Dual Polarization IQ/QAM Transmitter, QPSK/xQAM Multi-format


The dual polarization IQ/QAM Transmitter is a high performance modulation evaluation unit that allows user to produce optical signals with complex modulation schemes (PM-QPSK, QAM, OFDM). It integrates high bandwidth PM-QPSK modulator and high speed RF drivers capable of dealing with data rate up to 128 Gbps. It features an embedded bias controller that allows to automatically set the modulator operating point.

DPIQ Benchtop


C or L band, Dual Polarization
QPSK, Data rate up to 128G bps
16-QAM, Symbol Rate up to 25G Baud
Automatic bias point setup and tracking


Long Haul Optical Transmission
Microwave Photonics
Carrier-Suppressed Single Sideband
Testing and Measurement


Parameter Unit Min. Typ. Max.
Operating Wavelength nm 1530 1550 1610
Optical Bandwidth GHz 23 26 30
On/Off Extinction Ratio dB 22 30 35
Insertion Loss dB 8 10 15
Maximum Data Rate Gbps 100 128
Chirp, Alpha Parameter dB -0.15 0 +0.15
Input Optical Power @ CW dBm -10 10 15
RF-MZI Electrode Internal Push-Pull
RF Input Amplitude @50Ω mVpp 100 300 500
RF Channel Gain Imbalance dB 0.1 0.5 1.0
RF Gain dB Typ.10 ( No Adjustment)
Eye Diagram Adjustment Jitter and Cross-over
Bias Control Mode Automatic
Modulation Format
Dual Polarization
( 16QAM Upon Request )
Optical Input Option Tunable Laser
RF Input Port 2.92mm K-Male
or Compatible
50Ohms 4 Ports
Optical Fiber and Connector PM1550, FC/APC
Back Panel Interface Manual, Trimming
Operating Temperature 0 ~50
Power supply* AC 90~220V
Dimensions  (L×W×H)* mm 240x350x65

Note: *The specifications subject to change without notice.

*The appearance and the key component varies  according to different performance requirements.



1 2 3 4 5 6 7
Package Format Wavelength Optional 1 Optional 2 Optional 3 Connector
B=EVB 4=4QAM C=C band BC=Bias Controller DR=RF Driver TL=Tunable Laser FA=FC/APC
D=Benchtop 16=16QAM L=L band N=No BC N=No DR N=No TL NA=None

Constellation Diagram – X & Y Polarization