ALL OPTICAL OVSF CODE GENERATOR REALIZATION USING OPTICAL FLIP FLOP AND OPTICAL HARDLIMITTERS
Tamer A. Moniem, Noha EL Mosilhy · JES. Journal of Engineering Sciences/JES. Journal of engineering sciences · 2015
The orthogonal variables spreading factor (OVSF) provides variables data rates to flexible supportmany applications with different bandwidth. This paper presents an optical OVSF code generatorusing 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 opticalcommunications. The general objective is to make the OVSF code tree suitable to support a lot ofusers in the optical communication links. The overall design and the results are discussed through therealization and the computing numerical simulation to confirm its operation and feasibility. Theproposed scheme has been theoretically demonstrated for a spreading factor of 4 and 8.