Design and Performance Analysis of Large Capacity Sharable Optical CDMA Encoder/Decoder with Minimized Implementing Hardware

S. Shin, Y. Bai, and S. Lee (Korea)


Optical code division multiple access (OCDMA), generalized multi-wavelength Reed Solomon code (GMWRSC), generalized multi-wavelength prime code (GMWPC), arrayed waveguide grating (AWG), tunable wavelength converter (TWC).


We propose a two-dimensional (2-D) temporal/ wavelength large capacity shared-type optical code division multiple access (OCDMA) encoder/decoder which can cover larger number of subscribers with sharable less amount of implementing hardware. The encoder/decoder can be shared by many simultaneous users through arrayed waveguide grating (AWG) and the already used OCDMA codes can be re-allocated to other users by proposed programmable structure. The system employs generalized multi-wavelength Reed-Solomon code (GMWRSC) rather than generalized multi wavelength prime code (GMWPC) used in the conventional OCDMA system, which results in minimized implementing hardware. The performance of the proposed OCDMA system is demonstrated in terms of its eye diagram and BER by using a numerical modeling software package such as the VPI.

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