ARRAYED WAVEGUIDE GRATING MULTIPLEXER-DEMULTIPLEXER

摘要

A multiplexer-demultiplexer including: an AWG chip including a first input-output waveguide, a first slab waveguide connected thereto, an arrayed waveguide connected thereto and formed of parallel channel waveguides of different lengths, a second slab waveguide connected thereto, and second input-output waveguides connected thereto; a base plate joined to an underside of the chip; a fixed piece and a movable piece formed by the chip and the base plate being cut across the first or second slab waveguide; a reference plate to which the fixed piece is joined and against which the movable piece is abutted; a member bridging between these pieces and compensating a temperature-dependent shift of a light transmission center wavelength of the multiplexer-demultiplexer by expanding/contracting according to a temperature change and changing relative positions of the pieces; and a clip sandwiching the reference plate and the movable piece allowing the piece to slide on the plate.