2n coding architecture for optical code-division multiple-access

Wing C. Kwong, Guu Chang Yang, Paul R. Prucnal

Research output: Contribution to journalConference articlepeer-review


Recent study shows that optical code-division multiple-access (CDMA) networks cannot be evaluated or designed by only considering the performance (i.e., correlation properties) of the optical pseudo-orthogonal codes selected. The structures of optical encoders and decoders are another important factors to consider and are needed to coordinate with the selected optical codes as much as possible. As a result, a "serial" coding architecture for optical CDMA has been introduced. This new architecture is found particularly attractive for ultrafast optical processing and waveguide implementation for the future high-capacity, low-loss, all-optical CDMA networks. Since the optical encoder is made of a serial combination of 2×2 optical switches with n of them being biased to a "mix-split" state, the generated OOC's, so-called 2n codes, pose with a symmetric delay-distribution property. In this paper, we first experimentally demonstrate the serial coding architecture. Afterwards, some techniques for algebraically constructing 2n codes of weight 4 are presented.

Original languageEnglish (US)
Pages (from-to)153-164
Number of pages12
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1996
Externally publishedYes
EventAll-Optical Communication Systems: Architecture, Control and Network Issues II - Boston, MA, United States
Duration: Nov 20 1996Nov 21 1996

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


  • Optical code-division multiple-access
  • Optical orthogonal codes
  • Serial coding architecture


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