800-614-01

SuperK
SELECT
Product Guide

Revision 1.3 10-2023

PRODUCT GUIDEThis guide includes information for the following NKT Photonics products:

SuperK SELECT
Multi Channel Tunable Filter
Item number:
A203-XXX-XXX

SuperK External RF Driver
RF Signal Generator
Item number:
A901-100-000

SuperK COMMAND
Fast Wavelength Switching Signaling Interface
Item number:
A203-000-001

CAUTION: Do not open the device chassis. All chassis are equipped with warranty labels (see Figure 40) on their covers. The warranty is void if a device is
opened.

Manufactured by:

NKT Photonics A/S
Blokken 84, Birkerød-3460 Denmark
The information in this publication is subject to change without notice.
All company and product names mentioned within are either trademarks or registered trademarks of
NKT Photonics.
Specifications are listed as metric units. Imperial units listed are conversions.

Copyright 2023 NKT Photonics A/S. All rights reserved.

Author: W-10456

Guide Overview
This product guide is intended to provide functional, operational andinstallation information for the SuperK SELECT. The guide includes chaptersthat cover SELECT description, installation, operation and parameter
configuration.
WARNING: Do not operate a laser with the SELECT before first reading and understanding all warnings, cautions and handling information stated within the
document:
SuperK SELECT Safety, Handling and Regulatory Information
The paper copy of this guide is included with your accessory; it can also be
downloaded from:https://www.nktphotonics.com/product-manuals-and-documentation/

Terminology The guide may refer to the SuperK SELECT as the SELECT, device oraccessory.

Target Audience This guide is for technical personnel involved in the selection, planning anddeployment of lasers and photonic equipment in laboratory and industrial
settings. The guide assumes a reasonable knowledge level of lasers, photonic
principles and electrical interface connectivity.

Chapters Inside This guide includes the following chapters:•

Chapter I “Description” — Describes the accessory including its general
operational principles, management and interfaces.

•

Chapter 2 “Installation” — Includes information and procedures on how tocorrectly install the accessory chassis.

•

Chapter 3 “Output Power Considerations” — This chapter discusses beam
optimization and the strategies involved.

•

Chapter 4 “Using CONTROL” — This chapter provides the details on how tomanage the accessory using NKT Photonics CONTROL software interface.

•

Specifications — The guide includes appendices that cover specifications,
support contact details, how to install the management software, and a
special appendix on configuring and using a SuperK COMMAND module.

Added information Lasers with their accessories are highly dangerous devices that can cause
and Safety Notices serious injury and property damage. This guide use the following symbols toeither highlight important safety information or provide further information in
relation to a specific topic.

<3>

NOTE: Highlights additional information related to the associated topic and/or
provides links or the name of the NKTP guides describing the additional information.

CAUTION: Alerts you to a potential hazard that could cause loss of data, or damage the system or equipment.

WARNING: The laser safety warning alerts you to potential serious injury that
may be caused when using a laser with the accessory.

Revision This section records the document revision details.
Release date

Version and changes

2020-October

1.0 revised format updated from earlier manuals anddocuments.

2021-January

1.1 Updated support contact details in appendix B.

2021-April

1.0 Rolled back to revision 1.0 due to internal system
reasons.

2021 October

1.1 Updated λ bands for AOTF crystals in nIR2 column ofTable 1 on page 16.

2022 February

1.2 Updates include minor grammar corrections andimprovements in language clarity. Some figures havealso been modified for clarity.
• Updated description of “Auxiliary input” on page 20.
• Updated “Installing CONTROL” on page 63 with
Windows 10 screenshots.

2023 October

1.3 Updated the style of the document.

<4>

CONTENTS
Guide Overview ............................................................................................................... 3
Terminology ..................................................................................................................... 3
TABLES ....................................................................................................................................... 9
FIGURES ................................................................................................................................... 11
PROCEDURES .......................................................................................................................... 13

1

Description..................................................................................................................... 15
AOTF technology ........................................................................................................... 15
AOTF crystal types ......................................................................................................... 16
RF driver ........................................................................................................................ 17
Features ............................................................................................................................... 18
Output ............................................................................................................................ 18
Interlock .......................................................................................................................... 18
Shutters .......................................................................................................................... 18
Power lock (optional) ...................................................................................................... 18
Interfaces ............................................................................................................................. 19
Top panel ....................................................................................................................... 19
Optical apertures ............................................................................................................ 21
Monitor ports .................................................................................................................. 22
Electrical Interfaces ........................................................................................................ 23
External RF driver ................................................................................................................ 24
ERD - rear panel ............................................................................................................ 25
SuperK SELECT Control...................................................................................................... 26
Software Description ...................................................................................................... 26
Status LEDs ......................................................................................................................... 27
Chassis labels ...................................................................................................................... 28

2

Installation ..................................................................................................................... 31
Installation process ........................................................................................................ 31
General .......................................................................................................................... 31
Optical Connections ............................................................................................................. 32<5>

Inserting the SuperK collimator ...................................................................................... 32
Optical output ................................................................................................................. 33
Electrical Connections ......................................................................................................... 33
Single ERD system ........................................................................................................ 33
Dual ERD system ........................................................................................................... 35
Adding additional accessories ........................................................................................ 37

3

Output Power Considerations ....................................................................................... 39
Output beam quality............................................................................................................. 39
Free space delivery ........................................................................................................ 39
Fiber Delivery ................................................................................................................. 39
Optimum RF power.............................................................................................................. 40
RF power ........................................................................................................................ 40
Fiber coupled ................................................................................................................. 40
Optimum RF power level ................................................................................................ 41
Remapping the Optimum RF level ................................................................................. 42
Beam walk-off ...................................................................................................................... 42
Reduction in output power ............................................................................................. 42
Realignment ................................................................................................................... 42

4

Using CONTROL .......................................................................................................... 43
CONTROL overview ............................................................................................................ 43
Device Selector.................................................................................................................... 44
Address selector ............................................................................................................ 44
Status Panel......................................................................................................................... 45
Status Indicators ............................................................................................................ 45
System Info .................................................................................................................... 46
RF Power button ............................................................................................................ 46
Emission button .............................................................................................................. 47
Control settings .............................................................................................................. 47
Control panel........................................................................................................................ 49
Normal Operating mode ................................................................................................. 49
Fast wavelength switching mode ................................................................................... 53<6>

Wavelength sweep mode ............................................................................................... 54

A

Specifications ................................................................................................................ 57

BService and Support Information ................................................................................... 61
Servicing .............................................................................................................................. 61
Opening the chassis ...................................................................................................... 61
WARRANTY VOID IF REMOVED label ......................................................................... 61
Support Contact Details ....................................................................................................... 61
Online Support Web-page .............................................................................................. 61
Shipping Address ........................................................................................................... 62

C

CONTROL Software...................................................................................................... 63
Installing CONTROL ............................................................................................................ 63

D

Using a SuperK COMMAND module............................................................................. 69
Description ........................................................................................................................... 69
Connect to a SuperK SELECT system .......................................................................... 70
External signal requirements .......................................................................................... 71
Signaling and CONTROL configuration ............................................................................... 71
2 or 4-channel FWS ....................................................................................................... 71
Four 8-channel profile switching .................................................................................... 72
16-channel FWS ............................................................................................................ 74
Modulating emission power ............................................................................................ 77

<7>

<8>

TABLES
Table 1: AOTF crystal models – wavelength bands (nanometers) ............................................. 16
Table 2: SELECT Status LEDs ................................................................................................... 27
Table 3: Chassis labels............................................................................................................... 28
Table 4: Chassis labels............................................................................................................... 28
Table 5: Optical....................................................................................................................... 57

Table 6: Interfaces ...................................................................................................................... 57
Table 7: Mechanical dimensions................................................................................................. 57
Table 8: Electrical specifications – External RF Drivers ............................................................. 57
Table 9: Operating and storage environment ............................................................................. 58
Table 10: Safety and regulatory compliances ............................................................................ 58
Table 11: COMMAND input specifications.................................................................................. 71
Table 12: 2 or 4 channel FWS truth table ................................................................................... 71
Table 13: 4 profile FWS truth table ............................................................................................. 72
Table 14: 16-channel FWS truth table ........................................................................................ 74<9>

< 10 >FIGURES
Figure 1: SuperK SELECT with dual AOTF outputs – general view ........................................... 15
Figure 2: SuperK SELECT standard dual RF driver system view............................................... 17
Figure 3: Optical output shutters – VIR/NIR set open and NIR/IR set closed ............................ 18
Figure 4: Top panel..................................................................................................................... 19
Figure 5: Optical Interfaces......................................................................................................... 21
Figure 6: Optical Interfaces......................................................................................................... 22
Figure 7: Electrical Interfaces ad optical input ............................................................................ 23
Figure 8: External RF Driver unit – general view ........................................................................ 24
Figure 9: External RF Driver – rear panel ................................................................................... 25
Figure 10: SELECT Status LEDs................................................................................................ 27
Figure 11: Side panel manufacturing label ................................................................................. 28
Figure 12: Top panel labels ........................................................................................................ 29
Figure 13: Partially inserting the collimator ................................................................................. 32
Figure 14: Collimator alignment key and slot.............................................................................. 32
Figure 15: Collimator lock screw ................................................................................................ 33
Figure 16: Connecting a SELECT - single ERD ......................................................................... 34
Figure 17: Connecting single ERDs............................................................................................ 34
Figure 18: Bus defeater .............................................................................................................. 34
Figure 19: Setting External bus addresses - single ERD system ............................................... 35
Figure 20: Connecting a SELECT - dual ERD ............................................................................ 36
Figure 21: Connecting dual ERDs .............................................................................................. 36
Figure 22: Setting External bus addresses - dual ERD system .................................................. 37
Figure 23: Spectral output of a single AOTF channel ................................................................. 39
Figure 24: AOTF transmission spectrum for varying RF powers ................................................ 40
Figure 25: Optical power for a specific wavelength as a function of RF power .......................... 41
Figure 26: Wavelength versus optimum RF power level ............................................................ 41
Figure 27: CONTROL panel navigation ...................................................................................... 43
Figure 28: Device selector icon................................................................................................... 44
Figure 29: Device selector .......................................................................................................... 44
Figure 30: Device selector set to 0xE bus address..................................................................... 44
Figure 31: Status Panel .............................................................................................................. 45
Figure 32: CONTROL settings.................................................................................................... 47
Figure 33: Setup menu page ...................................................................................................... 47
Figure 34: CONTROL settings.................................................................................................... 49< 11 >

Figure 35: Channel controls - general operation......................................................................... 50
Figure 36: ‘Set button sliders ...................................................................................................... 51
Figure 37: Band views per output channel (crystal).................................................................... 51
Figure 38: VIS/NIR output with all channels ON ......................................................................... 52
Figure 39: NIR/IR output with all channels ON ........................................................................... 52
Figure 40: Dragging channels in the band view.......................................................................... 53
Figure 41: Fast wavelength switching mode............................................................................... 54
Figure 42: Wavelength sweep .................................................................................................... 55
Figure 43: Mechanical dimensions – Select module................................................................... 58
Figure 44: Mechanical dimensions – External RF Driver............................................................ 59
Figure 45: Warranty seal............................................................................................................. 61
Figure 46: COMMAND electrical connectors .............................................................................. 69
Figure 47: Connecting a COMMAND module............................................................................. 70
Figure 48: Fast wavelength switching: 2 or 4 λ setup ................................................................. 72
Figure 49: Fast wavelength switching: 4 profile setup ................................................................ 74
Figure 50: Fast wavelength switching: 16 λ setup ...................................................................... 76
Figure 51: Fast wavelength switching: simulated modulated 4 λ setup ...................................... 77
white< 12 >

PROCEDURES
Procedure 1: Inserting a SuperK output collimator .................................................................... 32
Procedure 2: Electrical connections for a SELECT with a single ERD ...................................... 33
Procedure 3: Electrical connections for a SELECT with dual ERDs .......................................... 35
Procedure 4: Connecting additional accessories ....................................................................... 37
Procedure 5: Remapping the optimum RF power level ............................................................. 42
Procedure 6: Installing CONTROL.............................................................................................. 63
Procedure 7: Setting up 2 or 4 channel fast wavelength switching............................................ 71
Procedure 8: Setting up four 8-channel profile switching........................................................... 73
Procedure 9: Setting up 16-channel fast wavelength switching................................................. 75< 13 >

< 14 >

1

Description
The SuperK SELECT is a plug & play filter accessory for the SuperK series oflasers. It can tune and select multiple wavelengths from the emission spectrumof a SuperK laser. The SELECT also includes a range of unique features whichmakes it an accessible, flexible and accurate tuning accessory to obtain any
wavelength at a configured power level from the output spectrum of SuperKseries lasers.

AOTF technology The SELECT uses Acousto-Optic Tunable Filter technology (AOTF). Each AOTF
can tune to over one octave of optical frequency. Using a single AOTF, the
SELECT can tune simultaneously up to 8 wavelengths and using an optional
second AOTF crystal, the SELECT widens its spectrum emission to a maximumof 16 tunable wavelengths. Note that the crystals are driven by a separate
External RF Driver that is connected to the SELECT.
Figure 1 SuperK SELECT with dual AOTF outputs – general view

The SuperK SELECT is versatile and supports the following features:•

Choice of wavelength splitting range•

Single or dual AOTF crystal•

Free space collimated or fiber coupled output beam delivery types

WARNING: The SuperK SELECT is for use with the SuperK laser series which arecomprised of Class 3B and 4 lasers. Only persons who are familiar with laser
safety regulations are allowed to operate any of these systems.
NOTE: This product has not been UL-approved; however, all integrated safety
components are UL-approved.

< 15 >

AOTF crystal types The SELECT can be specified with a variety of AOTF crystals that filter
wavelengths from the SuperK emission spectrum from 400 to 2000 nm. Table 1
lists the crystal models available and the combinations which can be fitted in adual AOTF SELECT. When dual crystals are fitted to the SELECT, the crystal
wavelength bands are selected to either extend the bandwidth or selectentirely different bands. For dual combinations shown in Table 1, where thebandwidth is extended, there is a gap due to the dichroic mirrors in the
SELECT. This is due to performance of the mirrors where their reflection andtransmission losses are at the maximum.
Table 1 AOTF crystal models – wavelength bands (nanometers)
Single crystal SELECT – λ band

UV-VIS
400-650 nm

VIS (1x)430-700 nm

VIS (4x)450-700 nm

VIS-nIR
500-900 nm

nIR1
640-1100 nm

nIR2
800-1400 nm

VIS-nIR
500-900 nm

nIR
640-1100 nm

nIR2
800-1400 nm

IR
1100-2000 nm

690-900

690-1100

800-1400

1100-2000

400-650–––

Single crystal SELECT – λ band

AOTF 1400-650–

690-1100430-670–

450-670–

800-1400–

800-1400

900-1400––

1100-2000
500-900––––

1100-2000
450-700

500-850–

1100-2000
430-700

450-700––

400-650

430-700

690-1100––

400-650

1200-2000
640-1100––

1200-2000
800-1100

2< 16 >

Dual crystal SELECT– λ bands

AOTF 2

RF driver An NKT Photonics External RF Driver (ERD) unit is connected to the SELECT’s RF1
input. A single ERD generates the necessary RF signals to drive a single AOTF
crystal. The RF signals generated by the driver are configured to drive an AOTF
for up to 8 output wavelengths. For a SELECT equipped with dual AOTFs and asingle ERD, only one AOTF can be configured for operation at one time. To
operate both AOTFs simultaneously, an additional ERD is connected to the
SELECT’s RF2 input. The External RF Driver is described in “External RF driver”
on page 24.
Figure 2 shows a SELECT system equipped with dual AOTFs and dual ERDs. All
units communicate through the External bus system and each ERD transmits an
RF signal over coaxial cable to the SELECT. Each AOTF of the SELECT receives
an RF signal from one of the two ERDs.The RF signals act on the crystal AOTFs
tuning them to filter the configured wavelengths emitted from the optical outputs.
Figure 2 SuperK SELECT standard dual RF driver system view

External RF
Driver 1

Optical outputs

Optical input

ou

t

ai
ns

RF
2
B
in
RF u st
1
dr hr.
iv toEers
fr xteo m rn
a
l
la b
se u
r s

in
RF

M

on

ito
r

m
AC

Ex
te
r
Ex & b nal
u btern s t us
al hr.
Bu b u
s s
de
fe
at
er

t2

ou

RF

RF

ou
t1

External RF
Driver 2< 17 >(fromlaser)

Features

Features
Output Emission from the SuperK SELECT output ports uses free space beams. To
deliver either the NIR/IR or the VIR/NIR output beam, a Fiber Delivery System(FDS) consisting of SuperK CONNECT and Fiber Delivery accessories can be
fitted to the SELECT.

Interlock The SuperK SELECT is designed to connect with the SuperK laser’s interlock
system. Emission is immediately disabled when the interlock circuit is broken
such as for example, an interconnected safety door switch. Refer to “Electrical
Connections” on page 33.

Shutters As a safety feature, each optical output of the SuperK SELECT is equipped with amechanical shutter. When a shutter is closed, it blocks all optical emission. The
shutters are manually operated by turning the shutter knob between the Open andClosed positions as shown in Figure 3.
Figure 3 Optical output shutters – VIR/NIR set open and NIR/IR set closed

CAUTION: When the laser outputs are not in use, NKTP recommends to CLOSE
the shutters.

NOTE: You can view the position of the shutters in the status panel of CONTROL,
see “Status Indicators” on page 45.

Power lock (optional) The Power Lock option enables you to lock and stabilize the emission power
level of the SuperK SELECT using a built-in photodetector. The detector output
is connected to the External Feedback BNC connector of the SuperK laser (ifequipped).
The long-term (multiple hours) stability of a locked output level is typicallystabilized to better than +/- 0.5 % depending on the wavelength. See “Monitor
ports” on page 22< 18 >

Interfaces

Interfaces
Top panel The top panel is shown in Figure 4 and includes shutter controls and mounting
holes.
Figure 4 Top panel
5

6

1
2

2

4

3

1

NIR/IR output shutter control

4

Auxiliary input

2

Mounting holes

5 Collimator locking screw

3

VIS/NIR output shutter control

6 Collimator release button

Collimator release button and locking screw
The beam output from a SuperK laser is from a barrel shaped collimator on theend of an armored fiber. When inserted into the optical input receptacle, it isautomatically retained by a locking mechanism that securely holds the barrel inplace. To release the collimator from the input receptacle, press the collimator
Release button (6). When the collimator is inserted, use the nearby locking screw(5) to securely fasten it.
Mounting holes
The two mounting holes (2) are designed to fasten the SuperK SELECT to either
metric or imperial optical tables that have screw holes spaced at either 25 mm or1” pitch.
NOTE: Two set of mounting screws are supplied in the NKTP Tool kit. One set
with metric threads and one set with imperial.
< 19 >

Interfaces

NIR/IR output shutterThis shutter can be set to block or unblock the NIR/IR output emission theaperture. Setting the shutter to Closed, blocks emission and setting it to Open,
unblocks emission from the aperture.
VIS/NIR output shutterThis shutter can be set to block or unblock the VIS/NIR filtered output emission
from the aperture. Setting the shutter to Closed, blocks emission and setting it
to Open, unblocks emission from the aperture.
Output monitors
See “Monitor optical output apertures” on page 21.
Auxiliary input
A beam from an optional extra laser light, is transmitted through the AUX input
port, where after it bypasses the VIS/NIR AOTF it is combined with the output
from the VIS/NIR output. The AUX input is intended for use with legacy SuperK
lasers that are limited in bandwidth to add for example, a 405 nm light source
to the output. When not used, a cover plate is mounted on the aperture.
AUX Output (not shown)This is an IR output where unused and unfiltered light from the input beam of
the SuperK laser is emitted from the SELECT. The port is intended for use withfor example, another SuperK SELECT operating at higher wavelengths. When
not used, a cover plate is mounted on the aperture to block emission.

< 20 >

Interfaces

Optical apertures Optical apertures are located on two of the side panels of the SELECT as shownin Figure 5 and described in the following.
Figure 5 Optical Interfaces

4
1
2
3

1

Optical input aperture3

VIS/NIR output aperture2

NIR/IR output aperture – with shipping
cover

4

Monitor optical output apertures – withpower monitors mounted

Optical input aperture
The Optical input aperture is a receptacle that houses the output collimator froma SuperK laser. The laser’s output collimator is inserted into the aperture until itclicks and locks in place. To remove the collimator, press the release button. The
collimator can be secured by tightening the lock screw.
The optical input includes an interlock switch. If a SuperK collimator is not fully
inserted in the input receptacle, the switch detects this and prevents emission(refer to Figure 7).
NIR/IR output apertureThis is a free space output aperture from the NIR/IR AOTF.
VIS/NIR output apertureThis is a free space output aperture from the VIS/NIR AOTF.
Monitor optical output apertures
See .“Monitor ports” on page 22.
NOTE: All output apertures include 4 screw holes for mounting for example, a fiber coupler with a SuperK CONNECT accessory. Mounting holes are threaded toaccept an M3 screw.

< 21 >

Interfaces

Monitor ports Monitor ports are located on the side panels of the SELECT as shown in
Figure 5. The ports and connectors shown in the figure are optionally fittedwith power monitors before leaving the factory. The power monitors receive atiny fraction of the VIS/NIR and NIR/IR output beams. The power monitors use a
detector which the SELECT uses to compose a signal that represents theoutput pulses.
Feedback power locking
The monitor signal is transmitted from the Monitor Output BNC port which is
fed to the external feedback port of a SuperK laser. This sets up a feedback
loop that stabilizes the laser emission power level.
The system only allows one output monitor signal to be transmitted from themonitor port. Therefore, a feedback loop can only be configured for a single
AOTF output (configured in CONTROL) “Power monitor selector” on page 48
Figure 6 Optical Interfaces
1

2

3

4

1.

VIS/NIR optical monitor aperture

3. VIS/NIR power monitor connector

2.

NIR/IR optical monitor aperture

4. NIR/IR power monitor connector< 22 >

Interfaces

Electrical Interfaces Figure 7 shows the electrical interfaces located on a side panel of the SELECT.
Figure 7 Electrical Interfaces ad optical input

1

2 3

5 6

4

7

8

9

1

Monitor output

6 RF Power I LED

2

Accessory bus address selector

73

RF Power II LED

8 Bus input port (External bus input)

4

RF Power II input

9 Emission, Power and Interlock LEDsi

5

RF Power I inputi.

See “Status LEDs” on page 27

Bus through port (External bus output)

Monitor output (optional)
The monitor output port transmits an electrical signal representing optical output
pulses from one of the optical outputs. Sampling from the VIS/NIR and NIR/IR
outputs is performed using optional power monitors (see “Monitor ports” onpage 22) that are fitted to the SELECT.
NOTE: The port’s function is optional and only available on custom orders as themonitors need to be factory fitted and calibrated with the SELECT. Contact NKT
Photonics sales engineering for further information.
Accessory bus address selector
Multiple accessories can be connected on an External bus daisy chain from a
SuperK laser. Each accessory requires a unique bus address. Use this dial to set
the bus address of the SELECT.
The address selector can set the bus address with up to 16 addresses from 0x0
to 0xF (hex). To set accessory addresses in the system:
1. Ensure the laser and External RF Driver (s) are turned OFF.
2. On each accessory, set a unique address.
3. Power ON the laser and External RF Driver(s)RF Power II LED
Indicates if RF power is received at the RFII input from an External RF Driver.

< 23 >

External RF driver

RFII input
For operating dual AOTFs synchronously, connect the RF output of a second
External RF Driver to this BNC port. The SELECT automatically switches theoutput RF signals from the two External RF Drivers to the AOTFs.
RFI input
This BNC port receives the RF signal from the External RF Driver RF output. The
system automatically switches the signal to the AOTF as configured in
CONTROL.
RF Power I LED
Indicates if RF power is received at the RFI input from an External RF Driver.
BUS ThroughConnects additional accessories to the External bus in a daisy chain
configuration. A bus defeater must be connected to this port if no otheraccessories are used with the SuperK laser. Without a bus defeater at the endof the accessory External bus daisy chain, the interlock loop circuit is left open
and emission is then disabled at the SuperK laser.
Bus input port
The bus input port connects accessories in a daisy chain with a SuperK laser.
SuperK lasers and their accessories connect using the NKTP External bus
protocol. The bus carries data communications, DC power and the interlock
signal from the laser to accessories connected on the bus.
Emission, Power and Interlock LEDs
See “Status LEDs” on page 27.

External RF driver
An External RF Driver (ERD) is an electrical driver for the AOTFs of the SELECT.
The ERD transmits an RF signal applied to an AOTF that to derive up to 8
desired wavelengths from the SuperK output spectrum.
The ERD is connected to the External bus of the SuperK laser system and ismanaged using NKT Photonics CONTROL software. Based on theconfiguration in CONTROL and the AOTF calibration, the ERD transmits anappropriate RF signal to an AOTF crystal. The RF signal applied to the AOTF
determines which wavelengths are filtered (up to a maximum of 8
wavelengths).
Figure 8 External RF Driver unit – general view< 24 >

External RF driver

ERD - rear panel Figure 9 External RF Driver – rear panel
9

1

2

3

4

5

6

7

8

10

11

1

Power/comms and interlock LEDs

7

Address selector (external bus)

2

Modulation connector

8

Bus through port (external bus)

3

PWM – reserved for future use

9

Bus input (external bus)

4

RF USB – reserved for future use

10

AC mains input - C14 line connector

5

RF Out11

AC mains ON/OFF switch

6

RF Out LED indicator

LEDs• Power/comms LED – Indicates External bus communication and if power isconnected.

•

Interlock LED– indicates if the Interlock circuit is open.

•

RF LED – RF signal is transmitting

Modulation connector
If Fast Wavelength Switching (FWS) is required, an optional SuperK COMMAND
module is connected to this port. A COMMAND module can connect to externalsignaling to drive FWS through the ERD and the SELECT. For more informationrefer to Appendix D.
Reserved for future use
PWM and RF USB ports are reserved for future use at this time and so are
currently not for use with the SELECT system.
RF out
BNC output port transmitting an RF signal to one of two RF input ports on the
SELECT.
Address selector
When multiple modules are connected to the External bus daisy chain, this switch
must be set to a unique number for the module before turning on power.
Bus input & through port
DB-15 in and out ports for External bus daisy chain connectivity< 25 >

SuperK SELECT Control

AC mains inputStandard C14 input connector for a C13 power cord.
AC ON/OFF switch
Toggles AC power on or off to the ERD.

SuperK SELECT Control
Software Description Both the SuperK laser and the SELECT accessory are controlled using NKT
Photonic’s CONTROL management software installed on a PC or the front panel
interface.
A management PC with CONTROL installed on it can connect to the laser using
either the USB serial port or the 10/100 BASE-T Ethernet ports on the laser.
CONTROL communicates with the SELECT through the laser’s External bus
connection.
Chapter “Using CONTROL” contains information on using NKTP’s CONTROL
software and how to connect to and control the SELECT. It also includes
instructions on how to set the UV center wavelength to a resolution of 0.1 nm tomatch the intended application.
CONTROL software installation
Refer to the procedure found in Appendix C.

< 26 >

Status LEDs

Status LEDs
The SELECT includes three status LEDs as described in Table 2. The LEDs arelocated on a side panel next to the External bus input as shown in Figure 10.
The emission LED is lit ON RED when the connected SuperK laser’s emission isenabled. When ON RED, laser light is present at the primary and auxiliary optical
output ports.
WARNING: If any of the aperture shutters are closed, emission is blocked. The position of the shutters does not affect the status of the emission LED, only theemission status of the connected SuperK laser.
Figure 10 SELECT Status LEDs

PowerInterlock

Emission

Table 2 SELECT Status LEDs
LED Name Condition

Description

Emission

Emission enabledi

ON RED

The SuperK laser system emission is ON and class 4
emission is present at the primary and auxiliary optical
output ports.
The position of the mechanical shutters at each output
port does not change the status of the emission LED.

Power

Interlock

i.
ii.

OFF

Emission disabled

ON GREEN

The SELECT is powered ON; the external bus 12V DC
power is OK.

ON RED

DC supply voltage is low.

FLASHING GREEN/
AMBER

Indicates data transmission on the external bus.

OFF

The SELECT is OFF; no DC power connected.

ON GREEN

Interlock safety circuit is closed; laser emission permitted.

ON REDii

Interlock safety circuit is open; laser emission is disabled.

Warning: SuperK emissions are rated Class 4.
Check the SuperK laser for interlock error information.

WARNING: DO NOT OPERATE the SuperK laser until you are familiar with the controls and have taken all precautions necessary as described in the laser’s safety
handling and regulatory information document.
< 27 >

Chassis labels

Chassis labels
The SuperK SELECT chassis includes multiple labels that indicate hazards andsafety and product information. The labels are located on the panels as
described in Table 4 with the panels shown in Figure 11 and Figure 12.
Table 3 Chassis labels
Label

Panel

Description

Class 4 Laser
Warning

Top

Safety information indicating the laser
emission radiation class andprecautions to take when the laser isoperating.

Laser Aperture Top

Safety information alert indicating thelocation of the aperture where laser
radiation is emitted from the device.

Manufacturing Side

Manufacturing information including
address, part and serial number, datemanufactured and regulatorycompliance.

Laser
Radiation
Warning

Safety information alert indicating thisarea of the device is near a source of
dangerous laser emissions.

Top

Table 4 Chassis labels
Figure 11 Side panel manufacturing label< 28 >

Chassis labels

Figure 12 Top panel labels

2
3
1

1
1

Laser Aperturesi

32

Laser Radiation Warningi.

NOTE: Laser apertures are located on the side panel below the label.

< 29 >Class 4 Laser Radiation Warning

Chassis labels< 30 >

2

Installation
CAUTION: For reliable operation, the SuperK SELECT should not be exposed tocorrosive agents or excessive moisture, heat or dust.

CAUTION: Ambient operating environment specifications are listed in Table 9.

CAUTION: This product is not UL-approved but all safety components are ULapproved.

Installation process The following steps outline the installation process:1. Prepare a suitable installation platform for the SELECT and External RF
Driver(s) – see section “General” below.
2. Place and fasten the SELECT to the prepared installation platform ensuring
the optical outputs are aligned with the intended application.
3. Place the External RF Driver(s) so that they can be connected conveniently
to AC power mains and the laser/SELECT.
4. Turn all optical output shutters to the Closed position.
5. Insert the SuperK output collimator into the Optical Input receptacle. See“Optical Connections” on page 32.
6. Follow the procedures applicable under “Electrical Connections” onpage 33 to connect the External bus and RF connections.
7. Ensure all bus addresses for each accessory are unique See “Accessory
bus address selector” on page 23.
8. Switch the SuperK laser power ON. (For some SuperK lasers this means
connecting DC power.)
9. Switch ON the External RF Driver(s).
10. Observe and ensure the power and Interlock LEDs are ON Green. See“Status LEDs” on page 27 to interpret their status condition. The Interlock
must be connected to a door switch. For more information, refer to the
documentation for your laser.

General All chassis types must be installed on a level surface that is free from vibrations.
The SuperK SELECT can be fastened to both metric and imperial optical tables.
The ambient temperature surrounding the laser and SELECT system should bestable and free from anything that could cause temperature fluctuations.
Temperature changes and vibrations may affect the device operation andresult in abnormal operation.

< 31 >

Optical Connections

CAUTION: The SuperK SELECT is intended for use with the SuperK Class 3B
and 4 lasers systems only. Using the SuperK SELECT with a laser source otherthan a SuperK laser may result in hazardous radiation exposure.

WARNING: To operate these systems, you must be familiar with laser safety regulations and have received instruction in the safe use of lasers.

Optical Connections
Follow the steps in Procedure 1 to insert the output collimator of the SuperK
laser into the Optical Input receptacle of the SuperK SELECT.

Inserting the SuperK Procedure 1 Inserting a SuperK output collimator
collimator
1. Disconnect power from the laser.

2. If not already installed, position the SuperK SELECT at its final operating
location and securing it to a suitable mounting surface.
3. Partially insert the laser’s output collimator barrel into the Optical Input
receptacle as shown in Figure 13.
Figure 13 Partially inserting the collimator

4. Holding the collar, rotate the collimator until the alignment key of thecollimator aligns with the slot at the optical port of the chassis (Figure 14).
Figure 14 Collimator alignment key and slot

NOTE: When the key is aligned with the slot, the axial orientation of the collimatoris correctly aligned.
< 32 >Electrical Connections

5. Push the collimator into the receptacle until its collar rests against thechassis. As you push it in, the collimator will encounter some resistance, andyou may feel two distinct clicks as it locks in place.
NOTE: Again, when seating the collimator in the aperture, you may need to rotate
the collimator slightly to align the collimator key with the alignment slot.
6. To secure the collimator in the receptacle, tighten the lock screw shown in
Figure 15 using a 2.5 mm hex key (Allen key).
Figure 15 Collimator lock screw
Lock screw
2.5 mm hex key

Insertedcollimator

Optical output All optical outputs are free space. NKT Photonics can provide SuperK CONNECT
accessories and collimators as described in the document:
SuperK CONNECT and Fiber Delivery Product Guide

Electrical Connections
For dual ERD systems – see “Dual ERD system” on page 35.

Single ERD system For basic operation, connect the External bus from the SuperK laser to the
SELECT and to the External RF Driver (ERD) where the bus is looped back with
the included bus defeater. The RF coaxial BNC port of the ERD must beconnected to the RF1 BNC port of the SELECT. Finally, a 50 Ω RF terminatorshould be placed on the unused RF2 BNC port of the SELECT. Follow
Procedure 2 to make the connections.
Procedure 2 Electrical connections for a SELECT with a single ERD
1. Disconnect power from the laser.
CAUTION: If the laser is powered ON when connecting the external bus cable,
DAMAGE can occur to both the laser and the SELECT.

< 33 >Electrical Connections

2. Using an External bus cable, connect the External bus connector of theSuperK laser to the Bus Input connector (item D of Figure 16) of the
SELECT.
Figure 16 Connecting a SELECT - single ERD

A
B

C

D
NOTE: Connect a 50 Ω BNC terminator to the unused RF input
port.

A: 50 Ω coaxial terminator
B: RF1 from RFout ERD
C: Bus Through to External BUSERD
D: Bus Input from External BUSSuperK laser

3. Using another External bus cable, connect the Bus Through connector of
the SELECT (item C of Figure 16) to the Bus Input connector of the ERD.
(item B of Figure 17)
Figure 17 Connecting single ERDs

C

A

B

A: RFERD to RF1 Select
B: External busfrom Select
C: Bus defeater

4. Connect the bus defeater (Figure 18) to the Bus Through connector of the
ERD (item C of Figure 17).
Figure 18 Bus defeater

5. Using the RF coaxial cable, connect the RF BNC port of the ERD (item A of
Figure 17) to the RF 1 port of the SELECT (item B of Figure 16).

< 34 >Electrical Connections

NOTE: To reduce RF leakage, connect a 50 Ω terminator to the unused RF port of
the SELECT (see Figure 16 item A).
6. Set the address bus select switches to a unique address for the SELECT and
ERD as shown in Figure 19.
CAUTION: All modules on the External bus must use a unique address. A bus conflict and system communication failure occurs when two or more modules are set
to the same address.
Figure 19 Setting External bus addresses - single ERD system

External RF Driver:
Bus address = 2

SELECT module:
Bus address = 0

7. Connect AC mains power to the ERD.
8. Turn ON the laser and ERD. Check that the SELECT is available in the Device
Selector panel of CONTROL (see “Device Selector” on page 44).

Dual ERD system For basic operation, connect the External bus from the SuperK laser to the
SELECT and to both External RF Drivers (ERDs) where the bus is looped backusing the included bus defeater on the last module in the bus chain. The RF
coaxial BNC ports of ERD 1 and ERD 2 must be connected to the RF1 and RF 2
BNC ports respectively on the SELECT. Follow Procedure 3 to make theconnections.
Procedure 3 Electrical connections for a SELECT with dual ERDs
1. Disconnect power from the laser.
CAUTION: If the laser is powered ON when connecting the external bus cable,
DAMAGE can occur to both the laser and the SELECT.

< 35 >Electrical Connections

2. Using an External bus cable, connect the External bus connector of theSuperK laser to the Bus Input connector (item D of Figure 20) of the
SELECT.
Figure 20 Connecting a SELECT - dual ERD

A

B

C

D

A: RF2 from RFout ERD2
B: RF1 from RFout ERD1
C: Bus Through to External BUSERD1
D: Bus Input from External BUSSuperK laser

3. Using the other External bus cable, connect the Bus Through connector of
the SELECT (item C of Figure 20) to the Bus Input connector of ERD 1 (item
C of Figure 21).
Figure 21 Connecting dual ERDs

ERD 1

ERD 2

E
A: RFERD1 to RF1 Select
B: RFERD2 to RF2 Select
C: External busfrom SelectD: External busERD1 to ERD2
E: Bus defeaterERD2 bus thr.

A B

C

D

4. Connect the Bus Through connector of ERD 1 to the Bus Input connector of
ERD 2 (item D of Figure 21).
5. Place the bus defeater (Figure 18) onto the Bus Through connector of the
ERD (item E of Figure 21).
NOTE: Ensure to terminate the External bus with an NKT Photonics bus defeater,
Without the bus defeater, the interlock circuit remains open disabling laser emission.
6. Using an RF coaxial cable, connect the RF BNC port of the ERD 1 (item A of
Figure 21) to the RF 1 port of the SELECT (item B of Figure 20).

< 36 >Electrical Connections

7. Using the other RF coaxial cable, connect the RF BNC port of the ERD 2 (item
B of Figure 21) to the RF 2 port of the SELECT (item A of Figure 20).
8. Set the bus address select switches to a unique address for the SELECT andeach ERD as shown in Figure 22.
CAUTION: All modules on the External bus must use a unique address. A bus conflict and the system communication failure occurs when two or more modules
are set to the same address.
Figure 22 Setting External bus addresses - dual ERD system

External RF Driver: 1
Bus address = 2

SELECT module:
Bus address = 0

External RF Driver: 2
Bus address = 4

9. Connect AC mains power to ERD 1 and 2.
10. Turn ON the laser and both ERDs. Check that the SELECT is available in the
Device Selector panel of CONTROL (see “Device Selector” on page 44).

Adding additional If additional accessories are to be connected to the SuperK laser External bus,
accessories follow the steps in Procedure 4.
Procedure 4 Connecting additional accessories
1. Remove the bus defeater from the Bus Through connector on your current
system. This is on the last accessory module in the External Bus daisy chain.

< 37 >Electrical Connections

2. Using an External bus cable, connect the Bus Through connector from thecurrent last module to the External bus connection of the newly added
accessory.
3. Repeat step 2 for each new accessory.
4. On last accessory module in the External bus daisy chain, connect the Bus
Defeater on its Bus Through connector.
5. Before powering on the system, set all bus address selector switches to aunique address.
The order of the modules on an External bus chain is not important. It is
important that power is OFF when connecting and the address selector switchof each module is set to a unique address before power is turned ON.
CAUTION: If the laser is powered ON when connecting the external bus cable,
DAMAGE can occur to both the laser, SELECT and ERDs.

NOTE: To enable emission on a SuperK laser, the power supply and the doorswitch interlock must be connected. Refer to the instruction manual for the SuperK laser system for more information.
NOTE: All bus cables used with a SuperK laser system must be shielded and amaximum of 3 meters long.

< 38 >

3

Output Power Considerations

Output beam quality
The output beam from the AOTF crystal naturally includes side lobes (seefigure 8-1). The side lobes have a different spatial distribution than the main
peak. This makes it possible to filter the beam spatially by inserting a small
aperture or by coupling to a single mode fiber.

Free space delivery In order to optimize the output beam quality, it is filtered through a small
aperture. Figure 23 shows the spectral output of a single AOTF channel as afunction of the size of the aperture. When there is no aperture, the main peakhas numerous side lobes on either side of the main peak. Decreasing the sizeof the aperture decreases the power in the side lobes. Power decreases
initially in the outer side lobes followed by the inner side lobes and eventually
the main peak.
In practice, the power in the first order side lobe and in the main peak iscoupled, so it is not possible to block the first order side lobes without
significantly decreasing the power in the main peak. The optimal aperture
occurs when the main peak and first order side lobes are transmitted but thehigher order side lobes are heavily damped.
Figure 23 Spectral output of a single AOTF channel

Fiber Delivery If a fiber delivery systemI is mounted to the outputs of the SuperK SELECT, thesingle mode coupling acts as a spatial filter. In this case, no aperture in the
beam path is required. Side lobe suppression will depend on the numericalaperture of the delivery fiber.
I.

Refer to the SuperK CONNECT FDS Product Guide< 39 >

Optimum RF power

Optimum RF power
RF power When operating the AOTF, RF power is one important factor to consider. As RF
power is increased, the central peak of the selected wavelength increases
gradually up to a point. Beyond this point, increasing RF power causes sideband power to increase instead of the central peak power. This is illustrated in
Figure 24. The RF power level beyond which the central peak does notincrease is called the optimum RF power.
NOTE: The systems shipped from NKT Photonics A/S, have their optimum RF
power mapped as a function of wavelength. Your SELECT system RF level is already optimally mapped at the NKT Photonics factory and unless you swap-out
certain hardware, no further optimization is required.
Figure 24 AOTF transmission spectrum for varying RF powers

In Figure 24, the red curve is optimum, whereas the green and blue curves
illustrate the result when RF power level is increased beyond the optimum.
Side band power increases and the amplitude of the central peak decreases.
In summary, the power ratio between the
2 sidebands and the primarytransmission (central) peak is determined by the selected configuration and theoperational parameters. For example, the selected wavelength, RF power andRF cable lengths used.

Fiber coupled In an application where the beam does not need to be perfectly single mode,
you can gain some output power increasing the RF power level beyond the
optimum. However, when single mode operation is needed, such as whenusing a fiber delivery system, going beyond the optimum RF power level resultsin decreasing output power. This is illustrated in Figure 25 where for a specificwavelength the fiber coupled power is plotted as a function of RF power. Once

< 40 >

Optimum RF power

the RF driver power reaches a level between 40 and 50 percent, no further output
optical power is achieved by further increasing the RF driver power.
Figure 25 Optical power for a specific wavelength as a function of RF power

Optimum RF The optimum RF power depends on several factors, one of which is the selected
power level wavelength. Figure 26 illustrates how the optimum RF power level for a typical visible
AOTF system varies as a function of wavelength. The shape of the curve in Figure 26,
depends on the components used and the RF cabling used between them.
Figure 26 Wavelength versus optimum RF power level< 41 >

Beam walk-off

Remapping the Since your SELECT system RF level is already optimally mapped at the NKT
Optimum RF level Photonics factory, the following procedure is not necessary unless the original
hardware has been swapped-out.
When remapping is required
The mapping depends on the specific hardware configuration (driver, crystal
and cables). If you decide to swap-out any part of your system’s factory
configuration remapping may be required. NKT Photonics suggests you
contact our support team before going forward with this procedure.
Remapping procedure
If the AOTF system configuration is changed and a remapping of the optimum
RF power level is needed, follow the steps in Procedure 5. Perform theprocedure for all wavelengths that you wish to implement.
CAUTION: Refer to the notice above in “When remapping is required” before
you perform this procedure. This procedure is unnecessary for factory stock
systems using the original supplied hardware.
Procedure 5 Remapping the optimum RF power level
1. Select wavelength.
2. Measure optical power as a function of RF power. This should result in a
curve similar to the one shown in Figure 25.
3. Determine the optimum RF power as the first peak on the curve (seeFigure 25).
4. Select the next wavelength and repeat from step 2.

Beam walk-off
Beam walk-off is a phenomena that displaces the beam alignment of thesystem upon a wavelength change. Beam walk-off in the AOTF of the SELECT
is a function of wavelength due to the grating’s first order diffraction.

Reduction in output When using an NKT Fiber Delivery System or similar, the beam output from thepower SELECT AOTF is aligned with the FDS optics to achieve optimum light coupling
efficiency. When changing the SELECT output wavelength, beam walk-off may
be pronounced enough to cause the coupling efficiency of the FDS to degradeconsiderably.

Realignment When power reduction is due to beam walk-off, realignment is necessary to
restore the optimum coupling efficiency and thus output power. The FDS must
be realigned using the procedures in the NKT Photonics document:
SuperK Fiber Deliver System Product Guide< 42 >

4

Using CONTROLCONTROL overview
CONTROL includes multiple panels and a selection of menu drop down itemsin the upper left corner. Figure 27 shows CONTROL’s main panels and menu;
their functions are described in the table below. This chapter only describes
CONTROL functions related to the SuperK SELECT, for all other functionality,refer to the specific SuperK documentation.
Panel

Function

See

DeviceSelector

Selectable list of connected devices (lasers andaccessories) sorted by the PC port they areconnected to.

Device Selector on
page 44

Quick
Connect

Provides a button when clicked, scans all available PC Refer to SuperK laser
ports for connected NKTP products.
documentation.

Status Panel

This panel displays the selected device status,
emission control and a CONTROL settings menu.

Status Panel on page 45

Menu Items

Five drop down menus with multiple functions.

Refer to SuperK laser
documentation.

Control Panel

The control panel provides adjustable settings for the Control panel on page 49
selected device. For the SuperK SELECT, CONTROL
includes configuration for wavelength and power
level for up to 16 channels.

Application
Log

This panel displays debug log output that can also be Refer to SuperK laser
saved to a file.
documentation.

DeviceMonitor

To help with troubleshooting, this panel displays
multiple port and device module parameters.

Refer to SuperK laser
documentation.

Figure 27 CONTROL panel navigation
Menu
items

Control panel

Status panel

Device selector list

Quick connect

Device monitor< 43 >

ApplicationlogDevice Selector

Device Selector
In the Device Selector panel, you can find icons of SuperK nodes that
CONTROL is currently communicating with. To manage any device, click on its
corresponding icon. When the icon is highlighted blue, its Control panel andStatus panel are displayed. In the device selector list, the SELECT isrepresented by the icon shown in Figure 28.
Figure 28 Device selector icon

Figure 29 shows a device selector list with a SuperK EVO laser and SuperK
SELECT accessory. An icon for the SELECT connected to the EVO has been
clicked on and selected which is indicated by the highlighted bar around theicon.
Figure 29 Device selector

External RF Drivers (ERD) are not shown in the device selector. ERDs operate inconjunction with the SELECT and any relevant configuration (for example,
selected wavelengths) from the SELECT configuration panels modifies thesettings for the External RF Driver(s).

Address selector When multiple accessories are used with a single SuperK laser, the laser’s
External bus connects accessories in a daisy chain topology. For each device,
the address selector wheel must be set to one of 16 (0x0 to 0xF) uniqueaddresses. Figure 30 shows a case where multiple accessories share theExternal bus. Refer to “Electrical Connections” on page 33 for information onconnection accessories.
2

Figure 30 Device selector set to 0xE bus address< 44 >

Status Panel

CAUTION: Only turn ON the SuperK laser and connected accessories after all connected accessories are configured with a unique address.

Status Panel
The Status Panel contains status indicators, error messages, an emission control
button, and a CONTROL settings menu.
Figure 31 Status Panel
Settings drop-down menu

Status indicators

System information &error display area

Emission button andindicator

Status Indicators The panel displays the following indicators:
VIS/NIR output shutter
Indicates the position of the mechanical shutter for the VIS/NIR output shutter.
The shutter is either in the closed or open position.

•

ON Green – the VIS/NIR output shutter is in the open position, laser emission
can pass through the aperture.

•

OFF Grey – the VIS/NIR output shutter is in the closed position, emission isblocked.

< 45 >

Status Panel

NIR/IR output shutter
Indicates the position of the mechanical shutter for the NIR/IR output shutter.
The shutter is either in the closed or open position.

•

ON Green – the NIR/IR output shutter is in the open position, laser emission
can pass through the aperture.

•

OFF Grey – the NIR/IR output shutter is in the closed position, laser
emission is blocked.

Interlock
Indicates the status of the Interlock circuit and whether emissions can beturned on or not. The indicator is either:•

ON Red – the interlock circuit is open or shorted to ground – no emission
allowed•ON Green – the interlock circuit is closed and reset – emission allowed

To clear the ON Red indicator, close the interlock circuit and reset it. Any shorts
to ground or circuit opens must be removed.
StatusIndicates the operational status of the laser. The indicator has the following
states:•ON Green – the SELECT is ready for operation.

•

ON Red – the SELECT has experienced a fault and has shutdown. An error
code is displayed underneath the Status indicator. Contact NKT Support if
the fault cannot be cleared - see “Support Contact Details” on page 61.

System Info The System Info section shows the following:•

SELECT Serial number•

SELECT Firmware version

See “View” on page 49 on toggling on and off the display of system
information.

RF Power button The RF power button toggles the supply of the External RF Driver (ERD) RF
signal power to the AOTF crystal(s). When clicked ON, the button indicatorturns ON RED and the crystal filters the beam according to the RF signal(“Channel buttons and text input fields” on page 50). When clicked OFF, nofiltered output is possible.
When this button is checked ON, the RF LED of the ERD is lit ON Red.

< 46 >

Status Panel

Emission button The emission button enables or disables the SuperK laser emission. The button
indicator turns ON Red when laser emissions are enabled. When disabled, theindicator is OFF Grey. This button is the same button available in the CONTROL
status panel of the connected SuperK laser. Refer to the SuperK laser
documentation for further information on managing emission.

Control settings The CONTROL settings are accessible by clicking the gear iconin the upper
right corner of the Status panel. Clicking the gear icon provides access to the
Setup and View setting menus as shown in Figure 32:
Figure 32 CONTROL settings

Click the gear icon
to access the menu

Setup
The setup page is shown below in Figure 33. Multiple settings for each output
are available and described in the following.
Figure 33 Setup menu page

< 47 >

Status Panel

VIS/NIR RF power – or – NIR/IR RF power – Range: Normal or Overdrive
In Normal mode, the power level in the main spectral peak increases as RF
power is increased. Power coupling to a fiber deliver system is optimized
when operating in this mode.
NOTE: The RF power settings for each crystal are calibrated at the factory together with the External RF Driver equipped with the system. Unless the crystal orExternal RF Driver is changed, this setting should always be set as Normalmode.
In Overdrive mode, as RF power increases, the main spectral peak only
increases up to a particular level of RF power. After that, increasing RF
power leads to an increase in side band power level and the power in themain peak starts to decrease. This mode results in slightly higher output
power. However, power coupling into a fiber deliver system is less efficientdue to higher side band power.
CAUTION: Only use Overdrive mode when either a new AOTF crystal or new External RF Driver is added to the SELECT. In these cases, the optimum RF power
calibration curve, set at the factory, is no longer valid and a new calibration
may be required as described in “Optimum RF power level” on page 41. Using
the Overdrive mode, results in slightly higher RF power applied to the crystal
which can cause issues with the beam lobes.
Power monitor selector
Range: VIR/NIR or NIR/IR
You can employ the Feedback power locking feature of the SuperK laser
by using the optional monitor output port of the SELECT. This parameter
sets monitor output port to transmit either the VIR/NIR or NIR/IR monitor
signal.
Connect the port to the SuperK laser’s external feedback port to feed the
SELECT’s power monitor signal to the laser. External power monitoring is
optional and installed at the factory – see “Monitor ports” on page 22.
NOTE: The power monitor signal can only represent the level of one of the output
ports as configured by the Power monitor selector setting.

VIS/NIR or NIR/IR power monitor gain
Range: X1 to X128
These settings increase or decrease the level of the monitor signal output
from the monitor output port. A gain of up to 128 times can be set and thesetting only functions when a least one power monitor and a monitor output
port is installed on the SELECT – see “Monitor ports” on page 22.

< 48 >

Control panel

VIS/NIR or NIR/IR modulation gain
Range: 0-1 V, 0-5 V, 0-10 V
When operating using Fast wavelength switching mode, the input modulation
gain should match modulation input signal(s) connected to an optional
SuperK COMMAND device. This setting allows you to choose between 3
different input voltage ranges for the Modulation inputs. The SuperKCOMMAND is an optional device specifically designed for Fast Wavelength
Switching using an FSK signal. For more information refer to Appendix D .
View
The View settings toggles on or off the display of the SELECT system info in thestatus panel.
System info – check or uncheck the box next to “System info” to toggle ON or
OFF the display of system information within the status panel.
Figure 34 CONTROL settings

Check to toggle ON the display of System info in the status panel

Control panel
The Control panel features three Operating modes:•

Normal – Up to 8 constant wavelengths can be configured for each crystal.

•

Fast Wavelength Switching – wavelengths are switched based on settingsand signaling from an external application with an optional COMMAND
module.

•Wavelength Sweep – the SELECT steps through multiple wavelengths at a
set rate.

Normal Operating The Control panel displays the output channel settings for the selected AOTF
mode crystal. For each crystal (VIS/NIR or NIR/IR output), up to 8 wavelengths and theirindividual power levels are set using the channel buttons. Select and configure acrystal’s channels by clicking on the Crystal drop down menu, see Figure 35.

< 49 >

Control panel

NOTE: If the system is equipped with a single External RF Driver, only a single
crystal or output is available for operation. You can select either AOTF using theCrystal selection drop down menu under Channels.
Figure 35 Channel controls - general operation
Select an AOTF crystal
Operating mode
drop down selection

Channel buttons andsettings
Click the channel # button
to turn it ON, it’s icon
appears in the band view

Band view withchannel 1 displayed

Crystal
Select either the VIS/NIR or NIR/IR AOTF crystal. The channel controls and“Band view” for the selected crystal is displayed.
NOTE: The Crystal selection arrow (i.e. the AOTF selection) is locked when a single ERD is equipped and the system RF power is ON (see “RF Power button” onpage 46). For dual External RF Driver systems, crystal selection is available(when two RF driver signals are present) thus channels can be activated on both
AOTFs.
NOTE: To select the other AOTF crystal on a single ERD equipped system, firstdelete the configured channels from the currently selected Crystal and turn OFF
RF power from the ERD.
Channel buttons and text input fields
8 channel buttons and their settings are available for each crystal. You can set
the power level and wavelength of each channel using the text input fields or
clicking the set button to launch a separate set of slider controls. Clicking thechannel button ON (green) enables the channel and it appears as a numberedsymbol in the “Band view”. When the channel button is ON and laser emission
is enabled, an output beam is emitted from the crystal at the set channel
parameters.
Set button
Instead of the band view, you can display sliders for each channel. Click the set
button to display the sliders for the channel setting. Click-hold and adjust the< 50 >

Control panel

sliders with your mouse to set the power and center wavelength of the channel.
To close the slider view, click the X in the upper right corner.
Figure 36 ‘Set button sliders

Band view
The band view displays a visual representation of the range of light wavelengths
available for a crystal. The range of wavelengths displayed, depends on theselected crystal. For example, when the output port for the VIR/NIS crystal isselected, the band shown ranges from 400 to 650 nm. If you select the NIR/IR
output port crystal, the band range changes to 690 nm to 1140 nm. The Y-axis of
the band view represents power in percentage. Within the band view, numberedsymbols appear for each wavelength (channel) switched ON.
Figure 37 Band views per output channel (crystal)

Click the channel # toggle
to turn it ON, it’s icon
appears in the band view

< 51 >

Control panel

When a channel is ON, it appears in the band view as shown in Figure 35. If all
8 channels are ON, 8 channels will appear in the band view as shown in
Figure 38 and Figure 39.
Figure 38 VIS/NIR output with all channels ON

Buttons toggled to green
indicate the channel is
ONEnter the channel’s
wavelength and power
level in the text fields

Channels appear
in the band view
when toggled ON
X axis - wavelength nm
Y axis - power level %NOTE: To simultaneously operate 8 channels in both the VIR/NIR and NIR/IRband views, two External RF Drivers must be equipped with the system. If only
one ERD is equipped and RF power is ON, the currently selected crystal operates. The system locks access to the other crystal.
Figure 39 NIR/IR output with all channels ON< 52 >

Control panel

Dragging channels
Using your mouse, you can click-hold on a channel symbol and slide it within theband view, thereby adjusting the wavelength and power level – see Figure 40.
Figure 40 Dragging channels in the band view

Click hold anddrag the icon

Release the mouseto set the new power& wavelength

Fast wavelength In fast wavelength switching mode, you can either switch between individual
switching mode wavelengths or configured profiles of up to 8 channels (wavelengths). To switch
wavelengths or profiles, a SuperK COMMAND module is connected to theExternal RF Driver. The COMMAND module has multiple inputs that accept
external signals to drive the selection of either wavelengths or profiles. The
COMMAND module is also capable of modulating the amplitude of the selected
wavelengths from the SELECT. Wavelength switching and amplitude modulation
can be achieved within approximately 10 μs. Refer to Appendix D for a
description of the SuperK COMMAND and detailed configuration instructions.
Wavelength Profiles
Figure 41 shows the configuration page for fast wavelength switching. In thewindow, to the right of Profile, are 4 profile buttons. Clicking on each button
displays a channels page for each of the 4 profiles. Refer to the procedures inAppendix D to configure the profiles for use with a SuperK COMMAND module.
NOTE: As stated to implement fast wavelength switching mode, a SuperKCOMMAND module must be integrated with the system. Refer to Appendix D for
detailed information.

< 53 >

Control panel

Figure 41 Fast wavelength switching mode

Wavelength sweep The “Wavelength sweep” mode allows for a relatively slow wavelength sweep/
mode step function. You can set a range of wavelengths to step through and repeat< 54 >

Control panel

as long as the Sweep button is clicked ON. Figure 42 shows an example of a
Wavelength sweep configuration with description below.
Figure 42 Wavelength sweep

Wavelength sweep example
In Figure 42, Wavelength sweep mode is set to perform the following sweep:•

Start wavelength is 400 nm•

Stop wavelength is 500 nm•

Step size is 50 nm•

Step interval is 5 seconds•

Channel power is 50%

For this example, three wavelengths are repeatedly selected: 400, 450 and 500
nm. The system emits 400 nm for 5 seconds then 450 nm for 5 seconds andfinally 500 nm for 5 seconds before repeating the sweep. You can set thecontrols as desired to achieve any sweep possible within the setting limits.

< 55 >

Control panel< 56 >

A

Specifications

Table 5 OpticalParameter
Number of tunable lines 1 – 8 (per AOTF)
Filter bandwidth of AOTF (UV-VIS) 1) [nm]i 1.8 – 8.5
Filter bandwidth of AOTF (VIS1x/VIS4x) 1) [nm]i 0.5 – 1.85 / 2.5 – 8.5
Filter bandwidth of AOTF (VIS-nIR) 1) [nm]i 3.5 – 14
Filter bandwidth of AOTF (nIR1/nIR2) 1) [nm]i 1.8 – 5 / 2.6 – 9.6
Filter bandwidth of AOTF (IR) 1) [nm]i 6.4 – 19.8
AOTF deflection efficiency [%] > 90 (1 – 8 channel operation)
Polarizationii Linear
Output mode Fiber or free-space collimatedMechanical shutter Integrated for both ports
Laser safety interlock Integratedi.
ii.

Collimated free-space output, FWHM bandwidth.
Horizontal with respect to base.

Table 6 Interfaces
All Chassis Models
External bus

DB-15 Female

Monitor

BNC (Optional - Custom feature, contact NKT Photonics)

Table 7 Mechanical dimensions
Specification

Select Module

External RF Driver

Size (H x W x D)

68 x 272 x 212 mm

66 x 441 x 370 mm

Weight7.9 kg

5.0 kgTable 8 Electrical specifications – External RF Drivers
Specification
Supply voltage

100 to 240 VAC

Power dissipation

60 W maximum

Fuse

T2A/250V< 57 >

Table 9 Operating and storage environment
Specification

Select Module

External RF Driver

Operating Temperature

18°C to 28°C

15°C to 37°C

Storage Temperature-20°C to 50°C

N/A

Operating Humidity (non-condensing)

20 to 80% RH

20 to 80% RH

Operating Altitude

3000 m maximum

N/A

Operating Air Pressure

700 hPa to 1060 hPa

N/A

Table 10 Safety and regulatory compliances
SafetyRegulatory

EN 60825-1:2014: Safety of laser products
Part 1: Equipment classification and requirements[Laser Class 4]
EN 61010-1:2010:Safety requirements for electricalequipment for measurement, control, and laboratory use
Part 1: General requirements

2014/30/EU: EMC directive
2014/35/EU: Low Voltage directive
EN 61326-1:2013: Electrical equipment for measurement,
control and laboratory use
EMC requirements – Part 1: General requirements

Figure 43 Mechanical dimensions – Select module2< 58 >

Figure 44 Mechanical dimensions – External RF Driver< 59 >

< 60 >

B

Service and Support Information

Servicing
The accessory has no user serviceable components. In case of malfunction,
contact NKT Photonics using the support channels in section “Support Contact
Details”.
CAUTION: Do not open the accessory chassis. The accessory is equipped withwarranty labels (see Figure 45) on the covers of the its chassis. The warranty isvoid if the system is opened.
CAUTION: The accessory contains electro-static discharge (ESD) sensitive components. To avoid permanent ESD damage, use ESD protection precautions
when handling the accessory. Always connect the accessory’s earth point to aground earth within your facility.

Opening the chassis There are no user serviceable components inside the accessory chassis.
Should your accessory malfunction, and it cannot be serviced on site, it must
be shipped to the NKT Photonics office in Denmark.

WARRANTY VOID IF The unit is sealed with a label “WARRANTY VOID IF REMOVED”. It is strictly
REMOVED label prohibited to remove the chassis cover.
Figure 45 Warranty seal

WARRANTY VOID IF SEAL
IS BROKEN OR REMOVED

Support Contact Details
For technical or general support, NKT Photonics can be contacted for help
regarding issues and questions with your accessory.

Online Support Web- 1. Go to:page
https://www.nktphotonics.com/support/
2. Scroll down and click or press:

3. Select the type of help required, fill in the form, and click or press Submit.

< 61 >

Support Contact Details

Shipping Address NKT Photonics A/S
Blokken 84
DK-3460 Birkerød
Denmark2< 62 >

C

CONTROL Software

Installing CONTROL
Download the software from:https://www.nktphotonics.com/support/
Follow the steps in Procedure 6.
Procedure 6 Installing CONTROL
Action1

On the PC, launch the installer package and then click the
Run button.
Installer

2

The installation wizard appears.
Click Next to continue.

3

Accept to use the default installation directory or selectanother directory by clicking the Browse button.
Click Next to continue.

< 63 >

Installing CONTROL

Action4

Uncheck the components you do not require. By default,
all components are installed.
Click Next to continue.

5

Read the End-User License Agreement, and check “Iaccept the license.” box.
Not checking the box ends the installation wizard.
Click Next to continue.

6

The wizard creates a start menu folder with program
short-cuts.
Use the default name or enter a new name for the folder.
Click Next to continue.

2< 64 >

Installing CONTROL

Action7

Check the box to create a desktop shortcut to accessControl.
Click Next to continue

8

Check the ‘Run the Silicon Labs CP10x driver installation’box and click Next.
Note: If you do not have the driver installed USB
connectivity will fail.

9

Click Install to install NKTP CONTROL software on yourPC.
Click Cancel if you want to abort the installation..

< 65 >

Installing CONTROL

Action10

The wizard displays a progress meter for the installation.
Note: a normal install should only take a few seconds.

11

Click Next to install the UART drivers for the PC USB port.

12

The drivers are installed.
Note: Depending on your computer this occurs so fast
you may not see this.

< 66 >

Installing CONTROL

Action13

The Silicon Labs drivers is installed successfully.
Click Finish to end the driver installation.

14

CONTROL is now installed.
Check the Run box to launch CONTROL when the Finish
button is clicked.
Click Finish to end the installation wizard.

< 67 >

Installing CONTROL< 68 >

D

Using a SuperK COMMAND module

Description
A SuperK COMMAND is a multi-input module that connects to the RF driver of a
SELECT system. The module accepts timing and modulation signals fromexternal applications. These signals are then used to drive and synchronize fast
wavelength switching and amplitude modulation of the output beam from an
AOTF crystal of a SuperK SELECT system. When using a COMMAND module,
the system can achieve wavelength switching based on external signal input atspeeds down to 10 microseconds.
Figure 46 COMMAND electrical connectors
Input pins Voltage adj. 0-10V output

3.3V output
Blank pin
MOD1-8 pins
FSK1-8 pins

40-pin SCSI cable connector (to External RF Driver)

All input pins are BNC connectors and include:•

8 FSK pins (FSK 1 to 8) – these pins typically connect to a logic signals froman application of interest. The FSK pins are used to select the AOTF’s
configured wavelength profiles and their respective channels.

•

8 Modulation pins (MOD 1 to 8) – A modulating signal can also be applied
to modulate the emission amplitude. Note that these pins must be pulledhigh when the FSK pins and the BLANK pin are used for wavelength or
profile selection.

•

1 Blank pin – The BLANK pin or blanking pin accepts a logic low or logic
high. The pin is used in combination with the FSK pins to select awavelength or profile from the CONTROL configuration. Switching or
selection of wavelengths or profiles is based on truth tables.

< 69 >

Description

Truth tables
When using a COMMAND module with the SELECT, wavelength or profile
selection is based on truth table results from a combination of the input signals.
The result determines the wavelength of a channel or entire profile asconfigured in CONTROL. Examples of this are described in section “Signaling
and CONTROL configuration” on page 71.

Connect to a SuperK 40-pin cable
SELECT system The COMMAND module includes a straight through 40-pin cable which must
be connected from the COMMAND module to the ERD’s Modulation connector(see “Modulation connector” on page 25).
Figure 47 shows the cable connected from the COMMAND module to the ERD.
CAUTION: Ensure all SuperK system modules are powered OFF before connecting the COMMAND module
Figure 47 Connecting a COMMAND module2< 70 >

Signaling and CONTROL configuration

External signal Electrical specifications for the COMMAND inputs are shown inrequirements
Table 11 COMMAND input specifications
Pin

Value

Comment

FSK1 to FSK8

0-3.3 V or TTL

MOD1 to MOD8

0-1 V, 0-5 V, 0-10 V

BLANK

0-3.3 V or TTL

Configured in CONTROL

Signaling and CONTROL configuration
For fast wavelength switching, CONTROL configuration determines the
wavelengths. Signals connected to the COMMAND module determine thewavelength(s) selected from the configuration. Refer to the figures in thefollowing examples to see how channel configuration relates to the input signals
connected to the COMMAND module from an application.

2 or 4-channel FWS For switching 2 or 4 individual wavelengths, connect application signals tomodule pins Blank and FSK1. Table 12 shows a truth table demonstrating the
wavelengths selected based on the input signals levels from your application.
Figure 48 shows the configuration in CONTROL and how the configuration is
selected based on the signal levels at the two pins. To set up 2 or 4-channel fast
wavelength switching, follow the steps in Procedure 7.
Table 12 2 or 4 channel FWS truth table
FSK1

Blank

Wavelength selected

Low

Low

Profile 1 Channel 1

High

Low

Profile 2 Channel 1

Low

High

Profile 3 Channel 1

High

High

Profile 4 Channel 1

Procedure 7 Setting up 2 or 4 channel fast wavelength switching
1. In CONTROL, click on the SELECT device icon and set the Operating mode to
Fast Wavelength Switching.
2. Select either the VIS/NIR or NIR/IR crystal.
3. Set the modulation gain in the Setup page to the 0-5 V range (see“VIS/NIR or
NIR/IR modulation gain” on page 49.
4. In each of the 4 Profiles, configure channel 1 with a desired wavelength.
When only 2 wavelength switching is required, you can configure channel 1 in
the first two profiles only. Figure 48 shows channel 1 configured in each of
the 4 profiles of a VIR/NIR crystal.
NOTE: Do not set channels 2 to 7 in the four profiles, leave them OFF.

< 71 >

Signaling and CONTROL configuration

5. Set the power level desired in one of the profile channels. This sets thepower level to be identical for all configured channels in each profile.
6. Using a BNC cable, connect the MOD1 pin to the +3.3 V output pin on the
COMMAND. When wavelengths are switched with constant amplitude, theMOD pin must be pulled high.
7. Connect the FSK1 and BLANK pins to your application.
8. The system is ready and channels are selected based on the signals shownin Figure 48.
Figure 48 Fast wavelength switching: 2 or 4 λ setup
CONTROL Channel/Profile

Wavelengths 1 to 4 Selectionin

ch1 - profile 1
MOD1inch1 - profile 2

V+Blankin

Test
Outputs

ch1 - profile 3V+

ch1 - profile 40V
V+Application
Signals

Blankin

FSK1in0V

Channel selected

ch1
profile 1

ch1
profile 2

ch1
profile 3

ch1
profile 4

Four 8-channel The system is also capable to switch the AOTF across all four 8-channel
profile switching profiles in Fast Wavelength Switching mode by connecting application signals
to module pins Blank and FSK1. Table 12 shows a truth table demonstrating the
profiles selected based on the input signals levels.
Figure 49 shows the configuration in CONTROL and how the profiles are
selected based on the input signals to the two pins. To set up four 8-channel
profile switching, follow the steps in Procedure 8.
Table 13 4 profile FWS truth table
FSK1

Blank

Profile selected

Low

Low

Profile 1 Channels 1 to 8

High

Low

Profile 2 Channels 1 to 8

< 72 >

Signaling and CONTROL configuration

Low

High

Profile 3 Channels 1 to 8

High

High

Profile 4 Channels 1 to 8

Procedure 8 Setting up four 8-channel profile switching
1. In CONTROL, click on the SELECT device icon and ensure the mode is set toFast Wavelength Switching.
2. Select the VIS/NIR or NIR/IR crystal.
3. Set the modulation gain in the Setup page to the 0-5V range (see“VIS/NIR or
NIR/IR modulation gain” on page 49.
4. In each of up to 4 Profiles, configure from 2 to 8 Channels. Each profile canhave multiple desired wavelengths set ON. Figure 49 shows 4 profiles eachwith 8 channels configured for a VIR/NIR crystal.
5. Set the power level desired of the profile channels. This sets the power level
to be identical for the same channels in each profile.
6. Using a BNC cable, connect the MOD1 pin to the +3.3 V output pin on the
COMMAND. When profiles are switched with constant amplitude, the MOD
pin must be pulled high.
7. Connect the FSK1 and BLANK pins to your application.
8. The system is ready and profiles are selected based on the signals shown in
Figure 49.

< 73 >

Signaling and CONTROL configuration

Figure 49 Fast wavelength switching: 4 profile setup
CONTROL Channel/Profile

Wavelengths 1 to 4 Selectionin

ch1 to 8/p1
ch1 to 8 - profile 1
MOD1inV+

ch1 to 8 - profile 2

Test
Outputs

Blankinch1 to 8 - profile 3

V+Blankin

0V
V+

Signals from
Application

ch1 to 8 - profile 4

FSK1in0V

ch1 to 8
profile 1

Profiles selected

ch1 to 8
profile 2

ch1 to 8
profile 3

ch1 to 8
profile 416-channel FWS For switching of up to 16 individual wavelengths, connect application signals tomodule pins Blank and FSK pins 1 to 8. Table 14 shows a truth tabledemonstrating the wavelengths selected based on the input signals from yourapplication.
Use profile 2 to configure the first 8 channels and profile 4 to configure the next
8. Figure 50 shows the configuration in CONTROL and how the configuration is
selected based on the input signals to the nine pins. To set up 16-channel fast
wavelength switching follow the steps in Procedure 9.
Table 14 16-channel FWS truth table
FSK1

FSK2 FSK3 FSK4 FSK5 FSK6 FSK7 FSK8 Blank Wavelength selected

High

Low

Low

Low

Low

Low

Low

Low

Low

Profile 2 Channel 1

Low

High

Low

Low

Low

Low

Low

Low

Low

Profile 2 Channel 2

Low

Low

High

Low

Low

Low

Low

Low

Low

Profile 2 Channel 3

Low

Low

Low

High

Low

Low

Low

Low

Low

Profile 2 Channel 4

Low

Low

Low

Low

High

Low

Low

Low

Low

Profile 2 Channel 5

Low

Low

Low

Low

Low

High

Low

Low

Low

Profile 2 Channel 6

Low

Low

Low

Low

Low

Low

High

Low

Low

Profile 2 Channel 7

Low

Low

Low

Low

Low

Low

Low

High

Low

Profile 2 Channel 8

High

Low

Low

Low

Low

Low

Low

Low

High

Profile 4 Channel 1

Low

High

Low

Low

Low

Low

Low

Low

High

Profile 4 Channel 2

Low

Low

High

Low

Low

Low

Low

Low

High

Profile 4 Channel 3< 74 >

Signaling and CONTROL configuration

Low

Low

Low

High

Low

Low

Low

Low

High

Profile 4 Channel 4

Low

Low

Low

Low

High

Low

Low

Low

High

Profile 4 Channel 5

Low

Low

Low

Low

Low

High

Low

Low

High

Profile 4 Channel 6

Low

Low

Low

Low

Low

Low

High

Low

High

Profile 4 Channel 7

Low

Low

Low

Low

Low

Low

Low

High

High

Profile 4 Channel 8

NOTE: You can also configure 16 wavelengths using profiles 1 and 3; however, thelogic of the signaling required for wavelength selection is reversed at the COMMAND module.
Procedure 9 Setting up 16-channel fast wavelength switching
1. In CONTROL, click on the SELECT device icon and ensure the mode is set toFast Wavelength Switching.
2. Select the VIS/NIR or NIR/IR crystal.
3. Set the modulation gain in the Setup page to the 0-5V range (see“VIS/NIR or
NIR/IR modulation gain” on page 49.
4. In each Profile 2 and 4, configure 2 to 8 channels with their desired
wavelengths. Figure 50 shows 8 channels configured in profiles 2 and 4 of a
VIR/NIR crystal.
5. Set the power level desired for a channel. The power level across profile
channels is constant. For example if you set channel 2 in profile 2 to 50%, thepower level of channel 2 in profile 4 will also be 50%.
6. Using BNC cabling and splitters, connect the MOD1 to 8 pins to the +3.3 V
output pin on the COMMAND. When wavelengths are selected with FSK
inputs, the corresponding MOD pin must be pulled high.
7. Connect the FSK1 to 8 and BLANK pins to your application.
8. The system is ready and channels are selected based on the signals shownin Figure 50.

< 75 >

Signaling and CONTROL configuration

Figure 50 Fast wavelength switching: 16 λ setup
Application signals
V+

V+

0V

0V

V+

0V

V+

0V

V+

0V

V+

Channel selected
0V

V+

0V

V+

0V

V+

0V

ch8 profile 4
ch7 profile 4
ch6 profile 4
ch5 profile 4
ch4 profile 4
ch3 profile 4
CONTROL Channel/Profilech2 profile 4
ch1 profile 4

Profile 2ch8 profile 2
ch7 profile 2
ch6 profile 2
ch5 profile 2

Profile 4ch4 profile 2
ch3 profile 2
ch2 profile 2
ch1 profile 2

Blankin

FSK1in FSK2in FSK3in FSK4in FSK5in FSK6in FSK7in FSK8in

MOD1inV+

Blankin< 76 >

Signaling and CONTROL configuration

Modulating emission To modulate the amplitude of selected channels, a modulating signal can be
power connected to the MOD1-8 signals (i.e. instead of them being pulled high). For
four-channel or four-profile FWS configurations only MOD1 is connected to avarying signal to modulate the channels. Use MOD1 to MOD8 as needed tomodulate channels in a 16-channel FWS configuration.
Modulation amplitude
CONTROL must be configured for the modulation signal range. See“VIS/NIR or
NIR/IR modulation gain” on page 49.
Simulate modulation
1. Using a 4-channel FWS configuration, connect the 0-10 V output pin of the
COMMAND to MOD1 instead of the +3.3 V output.
2. Set the modulation gain in the Setup page to the 0-10 V range (see“VIS/NIR
or NIR/IR modulation gain” on page 49.
3. With the system running, vary the voltage of the 0-10 V pin using theadjustment knob next to the pin.
4. Observe that the output emission level varies directly with the 0-10 V output
pin voltage.
Figure 51 Fast wavelength switching: simulated modulated 4 λ setup
CONTROL Channel/Profile

Wavelengths 1 to 4 Selectionin

ch1 - profile 1
MOD1inch1 - profile 2
Blankin

Test
Outputs
10V

ch1 - profile 30VV+

ch1 - profile 40V
V+

FSK1in0V

AOTF channel selected< 77 >

ch1
profile 1

ch1
profile 2

ch1
profile 3

ch1
profile 4

Application
Signals

BlankinSignaling and CONTROL configuration< 78 >

Item:Customer Revision:
NKT Photonics Revision:
Release Date:NKT Photonics A/S

800-614-01
1.3
2-0
10-2023

support@nktphotonics.com

Blokken 84, Birkerød-3460 Denmark
The information in this publication is subject to change without notice.
All company and product names mentioned within are either trademarks or registered trademarks of NKT Photonics.
Specifications are listed as metric units. Imperial units listed are conversions.
Copyright 2023 NKT Photonics A/S. All rights reserved.

SuperK SELECT Product Guide