ModBox-850nm-28Gbaud-PAM4

850 nm, 28 Gbaud Reference Transmitter

ModBoxThe ModBox-850nm-28Gbaud-PAM4 is the unique Linear Reference Transmitterat 850 nm available on the market allowing to generate very high quality PAM-4
data streams up to 28 Gbaud and NRZ up to 28 Gb/s. The transmitter producesvery clean eye diagrams with high SNR and short rise and fall times. It also
provides the flexibility of adjusting the extinction ratio for vertical eye closure.
The ModBox-850nm-28Gbaud-PAM4 provides R&D and Production engineers
with a user friendly turn-key instrument delivering state of the art performance.
It is being used in optical telecommunications laboratories and production test
beds.
The equipment incorporates a modulation stage based on a chirp-free LiNb03
Mach-Zehnder modulator, coupled with a high performance linear RF driver andan automatic bias control circuitry. It also integrates a DFB laser source.

FEATURES

In addition to the 850 nm, iXblue offers reference transmitters in the O-band,C-band.

• 850 nm Reference Transmitter• PAM-4 up to 28 Gbaud• NRZ up to 28 Gb/s

Performance Highlights• Reliable & reproducible measurements

Parameter

MinTypMax• High eye diagram stability

Operating wavelength-852 nm-• Variable Extinction Ratio

Modulation format
Modulation bandwidth

APPLICATIONSModulated output power (option HP)

PAM-4, NRZ
PAM-4 up to 28 Gbaud, NRZ up to 28 Gb/s
5 dBm

6 dBm

-

• Transmission system test
• Components characterization• Production test
• R&D laboratories
OPTIONS• Multi-Channel• O-band, C-band

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ModBox-850nm-28Gbaud-PAM4850 nm, 28 Gbaud Reference Transmitter

ModBoxFunctional Block Diagram

Laser

Laser output

Mod input

Modulator

DCRFMBCDriver

RF input

Mod output

The ModBox-850nm-28Gbaud-PAM4 features:•A chirp-free X-cut LiNb03 (Lithium Niobate) Mach-Zehnder external intensity modulator coming with an

unparalleled stability and a superior optical power handling capabilities. This modulator is moreover selected for its highelectro-optic bandwidth with flat and low ripple electro-optic response curve.
•A high bandwidth and highly linear RF driver.
•A modulator bias controller. The internal LiNbO3 modulator is a X-cut device with very low drift. However

an automatic bias control circuit is provided to lock the operating point of the modulator at the quadrature point whatever
the environmental conditions. The MBC ensures a highly stable optical output signal to provide reliable and reproducible
measurements.
•A 852 nm low RIN laser is integrated by default. For convenience, an external patch cord is delivered to connect

the laser output to the optical input of the modulation stage. Wavelength and power are tunable through the front panelcontrols or the ModBox software interface.
The ModBox-850nm-28Gbaud-PAM4 is controlled from the front panel via the Smart interface with a simple rotary knob andkeypad. The Smart manual interface allows for bias control circuit, driver gain and laser settings. It comes also with a simple GUI
solution, Windows based and implemented through the USB interface of the user PC.

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ModBox-850nm-28Gbaud-PAM4850 nm, 28 Gbaud Reference Transmitter

ModBoxInput Electrical Specifications

User supplied, not a ModBox specification

Parameter

SymbolCondition

MinTypMax

UnitData-rate-

PAM-4 electrical input signal

0.1-

28Gbaud

NRZ electrical input signal

0.1-

28Gb/s

Input voltage

VIN

AC coupled - 50 W SE - Linear operation-0.2000.300

Vpp

Jitter

JRMS--

11.2

ps

Rise / fall timetr / tf

20 % - 80 %-

1318

ps

Corss-point-

NRZ mode

455055%Input Optical Specifications

User supplied, not a ModBox specification

Parameter

SymbolCondition

Min

TypMaxUnit

Operation

lCW

850

852

854

nm

Polarization--PowerOPIN--10-dBm

Side Mode Supression Ratio

SMSR-30--dBSpectrum linewidth

DlFWHM-

0.51MHz

Polarization Extinction ratio

PER--19-dB

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Linear and controlled

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ModBox-850nm-28Gbaud-PAM4850 nm, 28 Gbaud Reference Transmitter

ModBox
Output Optical Specifications
Parameter

Specifications below are given with embedded 852 nm laser.

SymbolCondition

MinTypMax

Unit

Embedded Laserl

DFB integrated by default-852-nm

Data format--

Data-rate-

PAM-4 & NRZ-

PAM-4 electrical input signal

0.1-28Gbaud

NRZ electrical input signal

0.1-

28Gb/sStrandard

23-dBmHigh output power option

56-dBmJRMS

RMS Jitter, NRZ mode

-0.8-

psJPP

Peak-to-Peak Jitter, NRZ mode

-5-

ps

Minimum dynamic extinction ratio

DERMIN

By NRZ data input level adjustment

2-

-dB

Maximum dynamic extinction ratio

DERMAX

By NRZ data input level adjustment-

1013dB

Dynamic Signal to Noise Ratio

SNR

NRZ mode-

12-dB

Rise / fall timetr / tf

NRZ mode-15-

psCrosspoint-

NRZ mode

455055%

Optical return lossORL--40-45-

dB

Side Mode Supression Ratio

SMSR-30--dB

Spectrum linewidth

DlFWHM-1-

MHzSymbolCondition

MinTypMax

Unit

Wavelength laser tuning rangedl

Diode chip temperature control

-

0.8

1nm

Optical output power adjustment

dOPOUT

Diode Injection current control

0-

100%

Eye amplitude adjustment

dER--

3-

dB

Eye crosspoint adjustment

---4-

4%

Output modulated power

JitterOPOUT

SMART Interface and GUI
Parameter

Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are absolute stress ratings only. Functional operation ofthe device is not implied at these or any other conditions in excess of those given in the operational sections of the data sheet. Exposure to absolute maximum
ratings for extended periods can adversely affect device reliability.
Parameter

SymbolMinMax

Unit

Input voltage

VIN-

1

Vpp

Optical input power

OPin

-20

dBm

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ModBox-850nm-28Gbaud-PAM4850 nm, 28 Gbaud Reference Transmitter

ModBoxEye Diagrams - NRZ 25 Gb/s - 850 nm - From ModBox-850nm-28Gbaud-PAM4

Eye Diagrams - PAM-4 25 Gbaud - 850 nm - From ModBox-850nm-28Gbaud-PAM4

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ModBox-850nm-28Gbaud-PAM4

850 nm, 28 Gbaud Reference Transmitter

ModBoxInterfaces, Dimensions and ComplianceInterfaces
OpticalPolarization maintaining fiber PM85-U25D - FC/APC (by default, other connectors type in option)

RF inputSingle 1.85 mm female RF connector - 50 W

Control

Smart Interface (front panel), GUI (USB typeB)

Power supply100-120V/220-240 automatic switch 50-60Hz (Rear panel)

EMC and optical norms

EN61326-1 Ed. 2006 / NF EN 60825-1 & EN 60825-2 Ed.2014

Dimensions / Weight

Rack 19" x 3U, Depth=375mm / 3 kg

ModBox-850nm-28Gbaud-PAM4 - Front panel

Ordering information			

ModBox-850nm-28Gbaud-PAM4
09-2017_PT_SP_ED1

850nm = Operating wavelength, embeds laser at 852 nm by default
28Gbaud = Data-rate: NRZ up to 28 Gb/s - PAM-4 up to 28 Gbaud

Opt-YYYY = Output connectors, FA : FC/APC - SA : SC/APC

About us
iXBlue Photonics produces specialty optical fibers and Bragg gratings based fiber optics components and optical modulation
solutions based on the company lithium niobate (LiNbO3) modulators and RF electronic modules.
iXBlue Photonics serves a wide range of industries: sensing and instruments, defense, telecommunications, space and fiber
lasers as well as research laboratories all over the world.
Ixblue reserves the right to change, at any time and without notice, the specifications, design, function orform of its products described herein. All statements, specification, technical information related to theproducts herein are given in good faith and based upon information believed to be reliable and accurate
at the moment of printing. However the accuracy and completeness thereof is not guaranteed. No liability is assumed for any inaccuracies and as a result of use of the products. The user must validate all parameters for each application before use and he assumes all risks in connection with the use of the products

3, rue Sophie Germain
25 000 Besançon - FRANCE
Tel. : +33 (0) 381 853 180 - Fax : + 33 (0) 381 811 557
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