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