Exact evaluation of laser linewidth requirements for optical PSK homodyne communication systems with balanced PLL receivers

Sianchang Huang, Likarn Wang

Research output: Contribution to journalReview article

19 Citations (Scopus)


The power penalty induced by imperfect phase recovery in PSK homodyne communication systems with balanced phase-locked loop receivers are exactly evaluated. Optimum phase deviations between the mark-state and the space-state bits are used in this study. This study for the first time shows the imperfect-phase-recovery-induced power penalty as a function of laser linewidth with optimum phase deviations considered. It can be estimated from the theoretical result that an optimal balanced PLL receiver requires the laser linewidth as Δν ≤ 1.15 × 10-6 × (bit rate) in contrast to the previous reported one Δν ≤ 5.88 × 10-6 (bit rate). We also point out here that the previously reported laser linewidth requirement was wrongly estimated.

Original languageEnglish
Pages (from-to)661-664
Number of pages4
JournalJournal of Lightwave Technology
Issue number5
Publication statusPublished - 1996 May 1


All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics

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