Impact of RIN on Optical CDMA Transmission System

Optical code division multiple access (OCDMA) is one of the most upcoming technologies for future multiple access techniques along with WDMA and OTDMA. Optical CDMA offers greater scalability than other optical multiplexing technique and it provides flexible quality of service and data access security. OCDMA requires increasing demand for high speed, large capacity communications in optical networks which allow multiple users to share the fiber bandwidth. The data for multiple users are multiplexed asynchronously. In this Paper, we have presented an OCDMA model to the range of 90km. The simulation results reveal that the transmission distance is limited mainly by the Relative Intensity Noise (RIN) which arises when there is instability in the power level of a laser in the system because of the fact that RIN can be generated from fluctuations in the laser gain medium.