Implementation and realization of all-optical multiplexer and encoder using SOA

In this paper, we propose an all-optical 4:1 multiplexer using AND, OR and NOT logic gates based on semiconductor optical amplifier (SOA). A 4:2 all-optical encoder has also been realized employing two OR gates based on SOA. The proposed devices work on the principle of cross phase modulation, which occurs as a result of interaction of photonic wave fields in an optical medium, causing phase modulation as a result of changes in refractive index caused by one optical field.Operation of proposed multiplexer and encoder has been achieved at 100 Gbps thus verifying successful operation of the devices.