The results show that the hybrid system is suitable for dense optical CDMA communication, thereby, the problem that there are less available code sequences for multi-users is m.

Phase encoder/decoder for optical code division multiple access;

Encoder and decoder of fiber Bragg gratings in optical code division multiple access system based on reconstruction-equivalent-chirp;

The base-band bipolar optical code division multiple access (OCDMA) system is introduced, with transform of unipolar-bipolar and bipolar-unipolar, transmission of signal with bipolar codes is realized through unipolar medium.

Information eavesdropping techniques of spectral phase-coded OCDMA system;

Investigation of Upper-Bounds on BER of OCDMA Systems Using Time Spreading/Wavelength Hopping Codes;

Investigation on Dispersion and Nonlinearly Effect on the Performanceof FFH-OCDMA System;

Multi-user detector for ultrashort pulse optical code-division multiple-access systems;

The impact of fiber chromatic dispersion on the BER(bit error rate) performance of a direct sequence optical code-division multiple-access(COMA) system is analyzed based on the coupled nonlinear Schrdinger equation(CNLSE).

Optical en/decoder is one of the key factors affecting the performance of optical code-division multiple-access(OCDMA) system.

Based on phase Shifted Superstructure Fiber Bragg Grating(SSFBG),the structure and bipolar encoding/decoding principles of an Optical Code Division Multiple Access(OCDMA) system were researched and its correlation property was simulated by transmission matrix method.

A new decoder for optical code division multiple access(OCDMA) communication systems sproposed.

There are three key modules in coherent optical code division multiple access(OCDMA)system:source of ultra-short optical pulse,en/decoder and receiver.