An alternative approach of developing a frequency encoded optical tri-state multiplexer with broad area semiconductor optical amplifier (BSOA)

During the last few decades several logic gates, sequential and combinational logic devices, have been developed using light signals. For this work several encoding as well as decoding techniques are proposed for data handling and information processing with optics as information carrying signal. Frequency encoding technique is one such type of encoding processes, which gives a very good response for long distance communication of logically processed data because frequency is a fundamental character of light and it remains unchanged for long distance communication. Here in this paper the authors propose a frequency encoded multiplexer with the proper use of semiconductor optical amplifier in tri-state logic.

► Broad area semiconductor optical amplifier (BSOA) is an important device in optical switching. ► Tri-state logic systems are advantageous in optical parallel processing. ► Suggests a method of developing all optical digital multiplexer. ► Proposed multiplexer exploits the advantages of both tri- state mechanism and BSOA. ► Operation exceeding THz speed can be achieved by this technique with a very large number of channels.