SuperKVARIA

Tunable wavelength filter with variable bandwidthBandwidth and center
wavelength tuning
Ideal for Fluorescence-Lifetime Imaging
Microscopy
The SuperK VARIA is a unique filtering solution that allows
tuning of the center wavelength as well as the bandwidth of t
he filtered light.

SuperKVARIA
Applications
Test and measurement
High-sensitivity detectors
Photon counting set-ups
Characterization of nano-The VARIA suffers no polarization loss and delivers high-power
throughput. For example, above 50 mW per wavelength acrossthe full visible spectrum is easily achieved with the VARIA andthe SuperK FIANIUM FIU-15 using only a 10 nm bandwidthstructures

NKT PHOTONICS

BENEFITS

SuperK VARIA

Fluorescence-Lifetime Imaging
Microscopy, FLIM

2

SuperKVARIA

Ease of use
Co-linear output for all wavelengths
Choose your output to be either a free-space collimated beamor - via the SuperK CONNECT - a single-mode fiber delivery.
The output from the VARIA is co-linear for all wavelengths.

0.9
0.8
0.7

Out-of-band suppression
The VARIA has an industry-leading 50 dB out-of-band suppression, i.e. the signal difference between the transmitted lightwithin the selected wavelength region and the light leaking
through outside the filter bandwidth. This makes the VARIA
suitable for use with high-sensitivity detectors and photon
counting setups.

SoftwareNKT Photonics
CONTROLThe SuperK VARIA can becontrolled by our intuitive
CONTROL software that gives
easy access to all laser
functions.

Normalized transmission

0.6
0.5
0.4
0.3
0.2
0.1
0350

450

550

650

750

Wavelength [nm]NKT PHOTONICS

SuperK VARIA

850

The software automaticallydetects all units attached to thecomputer. You can control
several lasers simultaneously.
It is easy to use and supports
touch input as well as traditional mouse+keybord control.

BENEFITS

3Features
Options

IR pass-throughThe IR pass-through port transmits the part of the SuperK
spectrum above 900 nm without filtering. This IR output canthen be used directly or coupled into another filter accessory
like the SuperK SELECT.

Fiber delivery
SuperK CONNECT is a high-performance fiber delivery systemcomplete with broadband fibers and a range of termination
options such as FC/PC connectors or high-quality collimators.

Transmission versus bandwidth
The transmission through the VARIA is largely independent ofwavelength and bandwidth down to a bandwidth of 15-20nm
below which is drops off as shown in the following plot

Interfacing is handled by the CONNECT fiber coupling block
which ensures easy and stable single-mode coupling that canbe disconnected and reconnected without alignment.
Fiber delivery

1.2

Typical normalized transmission

1.0

0.8

0.6

0.4

0.2

0

SuperK
VARIA

0102030

40

50

60

70

80

90

Typ. coupling efficiency

70-80 %

Output fiber modeSingle mode

Termination options

Collimator, FC/PC or FC/APCFiber length

2.5 m (5 m/10 m available)

Polarization

PM or non-PM

400-840 nm tuning range
10-100 nm bandwidth>50 dB out-of-bandsuppression
High transmission, nopolarization loss
Tested and approved for FLIM
IR pass-through port
Easy Plug and Playconnection source
Simple and intuitive userinterface via NKT Photonics
CONTROL
Robust and compact industrial design
Maintenance-free 24/7 operation

100

Filter bandwidth [nm]NKT PHOTONICS

SuperK VARIA

SPECIFICATIONS

4

Specifications
OpticalMechanical/Electrical/Environmental

Wavelength tuning range [nm]400 – 840

Minimum bandwidth FWHM [nm]< 10Maximum bandwidth FWHM [nm]100Transmission through module [%] 1

70 - 90 unpolarizedUpper out-of-band suppression [dB] 2> 50Lower out-of-band suppression [dB] 3> 40

Output polarization

Unpolarized or
P-polarized (with added polarizer)

Tuning speed [nm/s]> 10

Repeatability of wavelength position [nm] 4< 0.2

Absolute wavelength accuracy [nm]±5Wavelength temperature sensitivity [nm/deg]< 0.05

Transmission temperature sensitivity [%/deg]< 0.2Interlock

Collimator, lead

Output mode

Collimated free-space orElectrical interface

SuperK BUS interface
Analog feedback signal

Dimensions (WxHxL) [mm3Weight [kg]211.5 x 67.6 x 272
7.91) Average in 50 nm bandwidth.
2) 10 nm above lower FWHM transmission wavelength in the 400-900 nm range.
With SuperK CONNECT single-mode fiber delivery, e.g. FD2.
3) 10 nm below lower FWHM transmission wavelength in the 400-900 nm range.
With SuperK CONNECT single-mode fiber delivery, e.g. FD2.
4) With collimator inserted. Wavelength position may shift if collimator is removed andreinserted.

SuperKVARIASupport andwarranty
The SuperK VARIA products
comes with industry leading
reliability and are backed by ourstandard 2 year warranty.

SuperK CONNECT with FC/APC

NKT PHOTONICS

SuperK VARIA

SPECIFICATIONS

5Technical Drawings

SuperKVARIAAll NKT Photonics products
are produced under ourquality management
system certified inaccordance with the
ISO 9001:2015 standard.

INVISIBLE LASER RADIATIONAVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION© Copyright 2023 NKT Photonics A/S All Rights Reserved

SuperK VARIA_20240516

CLASS 3B LASER PRODUCTNKT PHOTONICS

SuperK VARIATECHNICAL DRAWINGS6