MACH-ZENDER INTERFEROMETER TYPE ADD/DROP FILTER IN WAVE DIVISION MULTIPLE OPTICAL COMMUNICATION SYSTEM

摘要

PURPOSE: A mach-zender interferometer type add/drop filter in the wave division multiple optical communication system is provided to transfer a large number of each different signals of wavelengths at the same time by according the phases of two paths of both ends and adjusting the transition of a reflective wavelength arbitrarily. CONSTITUTION: Plane waveguide type 3-dB directional couplers(320,330) are connected to both ends of a multi-core optical fiber(310) respectively. A waveguide type connection part(340) connects between an input end and a drop end and the plane waveguide type 3-dB directional couplers(320). A waveguide type connection part(350) connects between an output end and an add end and the plane waveguide type 3-dB directional couplers(330). A phase adjuster(360) is connected between the multi-core optical fiber(310) and the 3-dB directional couplers(320). A phase adjustor(370) is connected between the multi-core optical fiber(310) and the 3-dB directional couplers(330). A variable reflective wavelength transition part(380) is connected to the multi-core optical fiber(310). A transition volume adjuster(380) is connected to the variable reflective wavelength transition part(380).