Optical Multi Format Transmitter

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Confidential – may only be distributed by permission of ID Photonics Inquire with info@idphotonics.com for details Optical MultiFormat Transmitter Extended Data sheet Feature Overview Highbandwidth single & dualpol optical IQ modulation High End Automated BIAS Control No dependency on applied modulation format and RF amplitude No user tweaking required Zero noise feature Supports fast and simple switching between modulation formats applied by signal source Builtin or external laser source Addon to electrical AWG device specific calibration files enable softwarebased predistortion USB & Ethernet interface for remote control SCPI style remote control command set, LabView® drivers supplied Customized variants possible Applications Generation of advanced optical modulation formats (e.g. QPSK, 16QAM, …) Reference transmitter Testing coherent optical receivers Multichannel transmission experiments for system design tests The Optical MultiFormat Transmitter (OMFT) is a fully integrated optical frontend instrument that converts electrical RF signals into an IQ modulated optical signal. This device provides excellent quality and matched channels optimized for next generation multilevel transmission formats at very high symbol rates. It is suitable as reference transmitter for receiver characterization or transmitter reference setup. The unit comprises a Mach Zehnder based optical modulator and RF amplifiers for connecting to Arbitrary Waveform Generators (AWG) or Pulse Pattern Generators (PPG). The unique RF amplitude / modulation format independent automated BIAS control allows users to apply customized RF input signals without requiring manual tweaking of parameters and guaranteeing operation at the optimal operating point. This enables longterm stable operation and automated switching between modulation formats. A zero noise feature allows to achieve optimal and repeatable performance. Custom configuration options such as an internal laser source are available allowing to provide customer specific turnkey solutions to match your need. Inquire with us for details.

Transcript of Optical Multi Format Transmitter

Page 1: Optical Multi Format Transmitter

Confidential – may only be distributed by permission of ID PhotonicsInquire with info@id‐photonics.com for details

Optical Multi‐Format TransmitterExtended Data sheet

Feature Overview

High‐bandwidth single & dual‐pol optical  IQ modulation

High End Automated BIAS Control 

No dependency on applied modulation format and RF amplitude

No user tweaking required

Zero noise feature

Supports  fast and simple switching between modulation formats applied by signal source

Built‐in or external laser source

Add‐on to electrical AWG

device specific calibration files enable software‐based pre‐distortion

USB & Ethernet interface for remote control

SCPI style remote control command set, LabView® drivers supplied

Customized variants possible

Applications

Generation of advanced optical modulation formats (e.g. QPSK, 16‐QAM, …)

Reference transmitter

Testing coherent optical receivers

Multi‐channel transmission experiments for system design tests

The Optical Multi‐Format Transmitter (OMFT) is a fully integrated optical frontend instrument that  converts electrical RF signals into an IQ modulated optical signal.This device provides excellent quality and matched channels optimized for next generation multi‐level transmission formats at very high symbol rates. It is suitable as reference transmitter for receiver characterization or transmitter reference setup.The unit comprises a Mach Zehnder based optical  modulator and RF amplifiers  for connecting to Arbitrary Waveform Generators (AWG) or Pulse Pattern Generators (PPG).

The unique RF amplitude / modulation format independent automated BIAS control allows users to apply customized RF input signals without requiring manual tweaking of parameters and guaranteeing operation at the optimal operating point. This enables long‐term stable operation and automated switching between modulation formats.A zero noise feature allows to achieve optimal and repeatable performance.

Custom configuration options such as an internal laser source are available allowing to provide customer specific turnkey solutions to match your need. Inquire with us for details.

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Key Features

Application Example GUI

• Automatic BIAS control independent of RF input signalsUnlike other solutions, our unique BIAS control does not rely RF feedback signals derived from the data signal to control the  phase electrode in IQ Mach‐Zehnder structures. Instead, it uses internally generated feedback signals to identify and track the optimal BIAS setting, which provides a number of advantages

• The control is stable and independent of the  RF input signal; supports all modulation formats• Operates without any RF signal applied to the modulator data inputs• No manual tweaking by user of control loop parameters such as offset values required• Almost zero average quadrature error of constellation

• Zero noise feature This feature will mute signals used for the automatic BIAS control and freeze its current status achieving optimum performance. Once disabled again, the automatic control will continue optimizing. This feature can be triggered either by Software or by a 5V TTL signal. 

• High‐end full digital signal processing (DSP)All feedback extraction and processing is done using digital DSP Technologies ensuring maximum of performance possible close to theoretical limits. Customized algorithms can be easily implemented by Software changes. A locking status indicator gives users certainty about current status of the control.

• Easy to use graphical user interface (GUI) and Remote controlA comprehensive GUI allows setting up, control and monitoring the unit within minutes. Remote control via Ethernet or USB gives a maximum of flexibility connecting to the board. Configurations can be stored locally on the unit which are still available after a reboot.The SCPI style interface allows to easily implement custom remote control software. LabView® drivers are provided.

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Application Example56Gb/s SP‐QPSK

BIAS control active BIAS control off after optimization Manual optimization

TLS

BIAS control

SP‐ IQ MZMBIAS

RF driver

SHF PPG

IDP OMFT

CoherentRx

RTScope

DSP processing

Setup

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Application Example128Gb/s DP‐QPSK

TLS

BIAS control

DP‐ IQ MZM

BIA

S

RF driver

Keysight AWG M8195A

IDP OMFT

Keysight OMA N4391A 33GHz

OMA Screen shot after 5 Minutes

Traces during initialization period Setup

Data shows speed of initialization and performance achieved after 5 Minutes

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Application Example256Gb/s DP‐QAM‐16

TLS

BIAS control

DP‐ IQ MZM

BIA

S

RF driver

Keysight AWG M8195A

IDP OMFT

Keysight OMA N4391A 33GHz

OMA Screen shot after 5 Minutes

Traces during initialization period Setup

Data shows speed of initialization and performance achieved after 5 Minutes

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Parameter Specification

Wavelength Range  [nm][THz]

1526 – 1610191.3 – 196.25

XY Polarization Imbalance [dB] < 1

Gain Imbalance [dB] < 1

DC Extinction Ratio [dB] > 18

IQ Offset [dB] < ‐20

Insertion Loss [dB](maximum transmission point setting, no RF modulation)

< 12dB

EVM*, 32GBaud DP‐QPSK [%]32GBaud DP‐QAM16 [%]

< 11.5< 10

Quadrature error* [deg],  averaged mean99% confidence in >4hrs

< +/‐0.5< +/‐ 5

Startup Time of automatic BIAS Control (until settled) < 5 Minutes, 1 Minute typical

Input Power Locking Range of Bias Control [dBm] 8 – 18

Maximum Optical Input Power (@ optical input of OMFT) +18 dBm

Output Connector FC/APC, FC/PC, SC/PC

Optical Fiber Polarization ‐maintaining PANDA type Fiber, PER > 20dB, 25dB typ.

E/O Bandwidth [GHz], 3dB >20

Electrical RF Connectors 2.92mm, female

Optimum RF Input Voltage [mVpp]

(@ RF input connectors of OMFT)

320 (~2*Vpi)

RF Amplifier Gain adjustment range [dB] > 3

Maximum Electrical Input Voltage, AC [mV pp]

(@ RF input connectors of OMFT)800

Maximum Electrical Input Voltage, DC [mV pp]

(@ RF input connectors of OMFT)2000

Maximum Ambient Temperature Gradient [K/hr] +/‐ 1

Specifications

* Using Keysight AWG M8195A signal source; Keysight OMA N4391A for analysis

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Specification ‐ Internal Laser Option

Optical Parameter Specification Unit

Frequency range;  C – BandL – Band

191.3 – 196.25186.35 – 190.95

THz

Channel Spacing Continuous GHz

Frequency Fine Tune Resolution  1 MHz

Frequency Fine Tune Range +/‐ 12GHz GHz

Optical Power Range, before modulator path 6 – 16 dBm

Spectral Line Width;  3dB instantaneous, 3.5us (Lorentzian contribution)

< 10025 typical

kHz

Frequency accuracy Over LifetimeOver 24 hours

+/‐ 1.5+/‐ 0.3

GHz

SMSR; Side mode suppression ratio > 40 (50typ.) dB

RIN (10MHz to 3GHz) < ‐145 (up to 40GHz) dB/Hz

Output accuracy over Lifetime  Over 1 hourOver 24 hours

+/‐ 0.01 (typ.)+/‐ 0.03 (typ.)

dB

Output Power Setting Resolution 0.01 dB

Optical Fiber Polarization‐maintaining PANDA type Fiber, PER > 20dB, 25dB typ.

Contact information

ID Photonics GmbHAnton‐Bruckner‐Str. 685579 NeubibergGERMANYTel.: + 49 (0) 89 – 201 899 16

info@id‐photonics.comwww.id‐photonics.com

Ordering Information

OMFT ‐X ‐XX ‐X ‐XX ‐XX

ArticleNo of 

PolarizationsModulator 

TypeLaser Variant Connector

OpticalMulti‐Format 

Transmitter

D: DualS: Single

IQ: IQ Mod.IN: Intensity Mod.

N: NoneC: C BandL: L Band

00: standardCC: customer specific

FA = FC/APCFP = FC/PCSP = SC/PC

V1.0

Mechanical  & electrical Parameter

Operating Temperature +10 to +35°C non‐condensing

Size of Device(H x W x D)

482 x 102 x 540mm(19 x 4 x 21 inch)

Power Supply 90‐240 VAC, 100W, 50/60Hz