Experiment research of multi-rate optical code division multiple access system based on linearly combinated code

Linearly combinated code (LCC) possesses the feature of large capacity, low bit error rate (BER). It is an effective way to realize the optical code division multiple access (OCDMA). Multi-bit rate transmission can be carried out by changing the number of sub-codewords in a LCC. Multi-bite rate random access experiment is set up by employing two-dimension time/wavelength domain fiber grating encoder and decoder based on the linearly combinated code. The sub-codewords of linearly combinated code come from prime code (PC)/PC set. In the experiment, spreading frequence of time domain and wavelength hopping are controlled by prime code with prime 3. The transmitting and receiving experiments for two users in every end are successfully executed. The feasibility of multi-bit rate optical code division multiple access system is experimentally demonstrated.