Tapered velocity couplers composed of nonlinear waveguides for limiting optical power

This paper proposes an optical power limiter composed of serially connected two tapered velocity couplers consisting partly of nonlinear material. The method of device designing is explained and it is exemplified that the opt ical output can be regulated stably to a prescribed value over a wide range of optical input. The del ice performance is: simulated by means: of FD-BP M algorithm.