Study of Phase Modulations With Dual-Balanced Detection in Coherent Homodyne Optical CDMA Network

Mohammad Karbassian, Hooshang Ghafouri-Shiraz

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In this paper, we examine the performance of two different phase modulation methods in coherent optical code-division multiple-access (OCDMA) systems. As optical spreading sequences, a recently introduced prime code family hereby referred to as double-padded modified prime code has been employed and analyzed. The OCDMA system operates under synchronous homodyne dual-balanced detection scheme. In this analysis, binary phase-shift keying format is deployed where the phase is modulated by either a Mach-Zehnder interferometer external phase-modulator or an injection-locking of distributed feedback laser diode's driving current. The performances of the two phase-modulation techniques in the presence of multiple-access interferences in a shot-noise limited regime are studied. Phase limitations and reasonable consequence associated with the limited phase excursion are also investigated.
Original languageEnglish
Pages (from-to)2840-2847
Number of pages8
JournalJournal of Lightwave Technology
Volume26
Issue number16
DOIs
Publication statusPublished - 1 Aug 2008

Keywords

  • Coherent balanced detection
  • limited phase excursion
  • multiple-access interference
  • prime code family
  • injection locking
  • optical code-division multiple access

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