Performance analysis of coherent optical POLSK receivers with local oscillator intensity noise and unmatched quantum efficiencies

Hideyuki Uehara, Tomoaki Ohtsuki, Iwao Sasase

Research output: Contribution to journalArticle


The sensitivity degradation due to unmatched quantum efficiencies is theoretically investigated for coherent optical POLSK heterodyne, homodyne and balanced receivers with shot noise, thermal noise and LO intensity noise. This analysis is based on the exact expressions of the probability density function (PDF) of the noise process to calculate the bit-error-rate (BER) considering LO intensity noise and unmatched quantum efficiencies. We derive the optimum LO power to minimize the power penalty for POLSK receivers. The theoretical results clarify the relation between the unmatched quantum efficiencies and sensitivity degradation due to the LO intensity noise. Based on this analysis, it is found that the balanced receiver is preferable for the design of POLSK receivers.

Original languageEnglish
Pages (from-to)1590-1599
Number of pages10
JournalIEICE Transactions on Communications
Issue number12
Publication statusPublished - 1994 Dec 1


ASJC Scopus subject areas

  • Software
  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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