Optical waveguide isolator.

摘要

Optical waveguide isolator (121) for monolithic integration with semiconductor light emitting diodes such as Fabry-Perot or ring laser diodes. The present optical isolator (121), with optical input port (95) and output port (96), comprises a branching waveguide coupler (56). This branching waveguide coupler (56) has a waveguide stem (60) splitted at one end into two waveguide branches (57,58) such that a light wave fed via said input port (95) into a first of these branches (58), is guided via the waveguide stem (60) and the output port (96) out of the device. A light wave fed to the isolator's output port (96) is guided along the stem (60) and coupled into the second waveguide branch (57) to the absorber (54). <IMAGE>