Abstract: A nonlinear optical transistor comprises a pair of surface emitting semiconductor laser diodes, a phase modulator including a waveguide confined by a pair of first mirrors in the horizontal direction and located between the pair of surface emitting semiconductor laser diodes and a multiplicity of electrodes for controlling these elements. The transistor is characterized by its input optical signals for controlling the system; its high sensitivity; its capability to generate narrow, circularly symmetrical and single mode output signals; and its ability to carry out a multi-level processing of optical signals as well as computing operations and storage functions. These characteristics are obtained by introducing a pair of Fabry-Perot microresonators, each of the Fabry-Perot microresonators having a vertical optical axis, by utilizing a plurality of multilayer Bragg reflectors, wherein surface coatings are applied to the input faces to increase the reflection index to 1.

Abstract: A nonlinear optical device, operating in an optical bistability mode, capable of carrying out amplification, commutation, switching and computing of optical signals, comprises, a pair of directional couplers formed by optically coupling a pair of waveguides and a pair of nonlinear circular resonators and an optical transistor incorporating an optical mixer of bifurcation optical active type capable of functioning also as a phase modulator.

Abstract: An optical transistor comprising two semiconductor lasers 1, arranged in a nonlinear ring vibrator 2, and two strip waveguides 3, each of which has a region A of optical coupling with the nonlinear ring vibrator 2, positioned on a common substrate. The regions of optical coupling are positioned diametrically opposite each other. The semiconductor lasers 1 have electrodes 4 for power supply. Each region A of optical coupling is provided with a control electrode 5 and each section of the nonlinear ring vibrator 2, located between the semiconductor 1 and corresponding regions of optical coupling, is also provided with a control electrode 6. Mirrors 7 form vibrators for the semiconductor lasers 1.