Coherent Receiver Frontend

At a Glance

  • Fully differential optical receiver frontend in a 19“ 1HE-chassis
  • Coherent detection of highspeed optical QPSK and n-QAM signals

Features

  • Includes coherent receiver module with integrated beam splitter, 4 balanced photoreceivers/-detectors and optical 90° hybrid
  • Different versions for 100 Gbit/s DP-QPSK and up to 64 Gbaud n-QAM
  • Up to 8 Electrical RF-outputs for pos./neg., I/Q and both polarizations
  • Optical inputs for LO / data signal
  • Automatic or manually tunable gain and peakdetector output in TIA-version

Applications

  • Coherent detection of high-speed data signals with various modulation formats (QPSK, n-QAM)
  • Coherent receiver frontend for optical data transmission
  • O/E converter for detection of arbitrary optical waveforms
  • High-resolution optical spectrum measurements

Specifications

  • Operating wavelength range (nm): C-band (1530 – 1570) or L-band (1570 – 1612)
  • 3dB cut-off frequency (GHz): typical 25, typical 40*
  • Average photodiode responsivity (mA/W): typical 50
  • Common mode rejection ratio (dBe): typical -20
  • Imbalance ISig and ILO (dBo): <2
  • Phase deviation (deg): +/- 5, +/- 1*
  • Polarization extinction ratio for Sig & LO (dBo): typical 20

* depending on the implemented coherent receiver version