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Lin Yang Sanya University, Sanya Hainan 572022, China   Abstract—This paper will improve the spectral amplitude coding is used for OCDMA wavelength division multiplexing passive optical network system. Improved the system bit error rate of less than 10-10, multiple access interference suppressed to some extent, the performance of the transmission network stable and less volatile, strong coding scheme of randomness, invasion of increased difficulty, confidentiality system have the corresponding increase.

With the basis of the Improved SAC Code of OCDMA Wavelength Division Passive Network Security Research