All-optical asynchronous detection for a compact integrable incoherent optical CDMA system

Yanhua Deng, Konstantin Kravtsov, Mable P. Fok, Paul R. Prucnal, Kensuke Sasaki, Gyaneshwar Chandra Gupta, Shuko Kobayashi

Research output: Contribution to journalArticlepeer-review

22 Scopus citations

Abstract

In this paper, we investigate all-optical truly asynchronous detection without global clocking in an incoherent optical code-division multiple-access (CDMA) system. The implemented system is designed with an integrable optical source consisting of an electro-absorption modulator for pulse carving, compact coders consisting of fiber Bragg grating arrays for encoding and decoding, and receiver consisting of an all-optical thresholder for data and clock recovery. We compare three detection schemes: 1) synchronous detection with data from a photodetector and clock from an external source; 2) asynchronous detection with data and clock from the all-optically thresholded signal received by a clock and data recovery (CDR) unit; and 3) asynchronous detection with data from a photodetector and clock extracted from the all-optically thresholded signal using CDR. Error-free transmission is obtained for detection schemes 1) and 3). A combination of all-optical thresholding and CDR technology is demonstrated in an optical CDMA system for the first time.

Original languageEnglish (US)
Pages (from-to)5370-5375
Number of pages6
JournalJournal of Lightwave Technology
Volume27
Issue number23
DOIs
StatePublished - Dec 1 2009

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Keywords

  • All-optical thresholder
  • Fiber Bragg gratings (FBGs)
  • Optical code-division multiple-access (CDMA)
  • Pulse carver

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