Lightwave Modulator for QPSK / QAM (LM-DPQAM-R)

Data Sheet

Product Overview

The Optilab LM-DPQAM-R is a high performance Dual Polarization Quadrature Amplitude Modulation (DP-QAM) lightwave transmitter designed for Optical Communication up to 400 Gb/s or beyond. The LMDPQAM-R incorporates an internal laser source (DFB, tunable laser) which couples into a four IQ drive speed MZI modulator for DPQAM modulation, with four broadband modulator drivers. The LM-DPQAM-R can also be used for Quadrature Amplitude Modulation (QAM). The LM-DPQAM-R has a built-in Automatic Bias Control board which allows for stable long-term operation, with up to 4 bias operating modes. Adjustable RF gain through the front panel interface and LabVIEW software can be performed.


  • Optical networks
  • Coherent communication
  • Research and development
  • Test and measurement


  • Up to 400 Gb/s bit rate
  • Quadrature modulator driver
  • Four auto bias modes
  • Four IQ modulators
  • Bandwidth options: 40/60/80 Gb/s

Feature Name Description
General Specifications
Bit Rate/ Bandwidth See Table 1.0
Internal Laser Source See Table 2.0
External Optical Input Level +20 dBm max
Impedance 50 Ω typ.
Optical Output Power -1 dBm min. @ 14 dBm input
Modulator Bias Mode Automatic bias control modes
Input RF Voltage Range 250 mV to 750 mV typ.
Eye Crossing Adjustment Available
Modulation Specifications
Operating Temperature -10 °C to +60 °C
Storage Temperature -50 °C to +90 °C
Power Supply Requirements 110/220 VAC, 50-60 Hz
Optical Connectors Diamond ADT-UNI APC
Input Fiber Type PANDA PM
Output Fiber Type SMF-28 standard; PANDA PM optional
RF Input Connector K type
Remote Control USB 2.0 and LabVIEW software included
Alarm Bias mode status, over temperature
Dimensions 1RU 482.60(L) x 470.57(W) x 44.00(H)