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All-optical code-division-multiplexing technique supporting multirate data communications and local-area-network

Jian-Guo Zhang1, Awnashilal B Sharma, Wing C Kwong

  • 1Telecommunications Research Group, School of Electrical, Electronic and Information Engineering, South Bank University, 103 Borough Road, London SE1 0AA, United Kingdom. zhangja@sbu.ac.uk

Applied Optics
|March 23, 2002
PubMed
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This study introduces a new all-optical code-division multiplexing (AOCDM) method using strict optical orthogonal codes (OOCs). This technique enhances bandwidth efficiency and reduces bit error rates for multirate data communications.

Area of Science:

  • Optical Communications
  • Telecommunications Engineering
  • Information Technology

Background:

  • Existing all-optical code-division multiplexing (AOCDM) systems face limitations in supporting multirate data.
  • Conventional optical orthogonal codes (OOCs) can lead to performance degradation due to higher correlation constraints.

Purpose of the Study:

  • To propose an efficient AOCDM technique supporting multirate data communications and local-area-network (LAN) interconnections.
  • To enhance system performance by minimizing cross- and autocorrelation constraints.

Main Methods:

  • Utilizing strict optical orthogonal codes (OOCs) in multirate AOCDM systems for incoherent optical processing.
  • Analyzing implementation issues, including optical transmitter design and trade-offs in coherence time, spectral width, and pulse width.

Related Experiment Videos

Main Results:

  • The proposed strict OOC approach guarantees minimum autocorrelation and cross-correlation constraints (i.e., 1).
  • Multirate AOCDM systems demonstrate high operational flexibility for various bit rates and protocols.
  • The new system offers improved bandwidth efficiency and a lower bit error rate compared to conventional OOC systems.

Conclusions:

  • The proposed multirate AOCDM technique effectively supports diverse data communication needs.
  • Strict OOCs are crucial for optimizing performance in AOCDM systems.
  • The system provides a flexible and efficient solution for modern network interconnections.