ZnS/ZnSe stratified grating wave filter fabricated by using vacuum coating technique on BK7 glass waveguide is reported in this paper and at room temperature optical controlling switch modulation of the grating wave filter has been realized by means of prism coupling with waveguide under Ar + laser paulse.

Present situation of research in picos econd optical switch controlled by optical light;

Demonstrating characteristic of photoresistance using acoustooptic controlled switch;