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106Gbps per Lane Optical DSP

LCredo Lark 850

Lark 850

The Lark 850 is a uni-directional 8 x 112Gb/s Digital Signal Processor (DSP) IC that is optimized for Linear Receive Optics (LRO). In an LRO transceiver or Active Optical Cable (AOC), only the transmit path from the electrical input to the optical line side output includes a DSP for signal retiming and equalization.

The Lark 850 based optical transceiver addresses the inherent weakness of a Linear Pluggable Optics (LPO) implementation by facilitating IEEE compliant optical transmit signaling and easing the deployment burden on system operators by eliminating manual, per port tuning.

Credo Lark 850

Parameters

Host Side
8x106G PAM4
Line Side
8x106G PAM4

Features

  • Powerful copper optimized DSPs on the electrical host side deliver industry leading sensitivity and BER performance.
  • High-performance transmitters come with multi-tap FIR filters and non-linear cancellation, allowing precision optimization at the optical interface.
  • Host side interface supports VSR or extended MR PCB reach, connecting seamlessly with different length switch interfaces without need for customized per-channel settings.
  • Independent phase locked loops per channel support flexible breakout configurations including 2x400GbE, 4x200GbE and 8x100GbE.
  • Full suite of test features simplifies lab bring-up, production testing and reduces time-to-market.
  • Low power dissipation enables higher rack utilization and lower thermal cooling requirements.

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