Comparative Study of Codes for Spectral Amplitude Optical CDMA

Optical communication finds lot of new technology for the processing of signals by using optical fibers. Optical code division multiple access (OCDMA) is a branch of optical communication, which finds application in many communication systems. It has a bright future in communication because of its speed, efficiency, security and unlimited band width. The major advantage of OCDMA is its effective utilization of bandwidth as well as the multiuser communication capabilities. OCDMA requires spectral amplitude coding (SAC) to eliminate multiuser interference and also suppress the effect of phase induce intensity noise (PIIN) with fixed in phase cross-correlation. From past few decades work is going on rapidly for the generation and implementation of new SAC so that the problems of multiuser interference and different type’s attenuation and noises can be eliminated. There are many codes available which has their own reliability and advantages over the other. This paper presents a review on various codes on SAC OCDMA system which can be efficiently used in optical communications.