This paper describes a fast power transient management functionality incorporated into a 12.5 Gb/s maximum likelihood sequence estimation (MLSE) receiver for optical add/drop multiplexer (OADM)-based WDM networks. The receiver has a VGA with a fast automatic gain control and a high-bandwidth offset cancellation loop. Measured results indicate that the receiver IC tolerates a 10 dB/10 μs optical power transient with 72 consecutive identical digits with no BER impact, and offers a 100X improvement over a standard CDR in tracking an 8 dB sinusoidal power transient at a BER of 10^{-4}.

Original languageEnglish (US)
Article number4684632
Pages (from-to)2958-2966
Number of pages9
JournalIEEE Journal of Solid-State Circuits
Issue number12
StatePublished - Dec 2008


  • Clock and data recovery (CDR)
  • Electronic dispersion compensation (EDC)
  • Maximum likelihood sequence estimation (MLSE)
  • OC-192
  • Variable gain amplifier (VGA)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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