Patent ID: 7356219
Filing Date: 2008-04-08
Classification: G02B,G02F,H04Q

Abstract:
1. An integrated optical add/drop device having switching function for use in wavelength division multiplexing optical communication systems, the add/drop device comprising: first and second interferometric arms of an interferometer, the first and second interferometric arms being located between first and second 3-dB optical coupling regions; a tunable optical filter having first and second input ports and first and second output ports, said first input port being connected to a first portion of said first interferometric arm, said second input port being connected to a first portion of said second interferometric arm, said first output port being connected to a second portion of said first interferometric arm, said second output port being connected to a second portion of said second interferometric arm, said tunable optical filter being configured for acting as a selective switch exchanger for exchanging between one interferometric arm and the other at least one of a plurality of optical signals S(λ at least first and second variable optical phase shifters located on opposite sides of said optical filter.