All Optical Ovsf Code Generator Realization Using Optical Flip Flop and Optical Hardlimitters

Abstract

The orthogonal variables spreading factor (OVSF) provides variables data rates to flexible support many applications with different bandwidth. This paper presents an optical OVSF code generator using all optical gates and a set of all optical flip-flops based on two coupled polarization switches (PSWs). The optical OVSF code generator helps to use the OVSF code technique in optical communications. The general objective is to make the OVSF code tree suitable to support a lot of users in the optical communication links. The overall design and the results are discussed through the realization and the computing numerical simulation to confirm its operation and feasibility. The proposed scheme has been theoretically demonstrated for a spreading factor of 4 and 8.