33 GHz Linear AGC Balanced Optical Receiver

May 10, 2024

The DSC-R422 is a linear AGC balanced receiver ideally suited for a variety of analog and digital applications, such as coherent 100G / 200G / 400G systems. The R422 offers a variety of useradjustable characteristics such as RF gain, output amplitude, and mode of operation (AGC or manual gain control). The R422 offers 33 GHz bandwidth, gain up to 2800 V/W, low power dissipation and a peak detector function. The R422 is available in a GPPO module package as well as in Discovery’s Lab Buddy instrument. The Lab Buddy is offered with built-in firmware which allows it to be integrated with other pieces of equipment in automated test setups.

Salient Features:

  • Balanced optical receiver to 33 GHz with well-matched fiber length, responsivity & RF response
  • Two modes of operation: automatic gain control (AGC) or manual gain control
  • User-adjustable differential gain: up to 2800 V/W
  • Operating wavelength from 1000 nm to 1650 nm
  • Peak detector function for monitoring of RF output amplitude
  • Low optical PDL (typically 0.05 dB)


  • Digital coherent systems, including DP-QPSK and 16QAM, up to 56 Gbaud
  • Coherent PON
  • Analog and RF photonics applications to 33 GHz
  • Free space communications links

Available Models:

  • DSC-R422 – 33 GHz Linear AGC Balanced Optical Receiver

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