OCDMA technique with the switching of code between the users for enhancing the security

A new technique is proposed for optical code division multiple accesses for enhancing the security against the eavesdropper. Switching of the pulse spectrum of code is performed between the two users and switching position of the pulse spectrum of code varies from group to group. In this technique every pulse of a code does not have direct information. Code detection probability of individual user decreases against the eavesdropper. The analysis and simulation result compares with the exiting method MQC, RD and MDW code.