OPTICAL WAVEGUIDE CIRCUIT MODULE

摘要

PURPOSE:To prevent characteristic deterioration caused by mismatching in coefficient of linear expansion between optical waveguide circuit constituent members. CONSTITUTION:An optically transparent filler 21 which has a refractive index nearly equal to the refractive index of a refractive index matching layer 5 provided on the connection border surface between an optical waveguide chip 1 and optical fibers 2, 3, and 4 for optical input and output and also has viscosity is charged in the periphery of the border surface and this filler enters a gap if the gap is formed between the optical fiber end surfaces and optical waveguide chip owing to peeling, thereby holding characteristics similar to those of the optical waveguide before the connection border surface peeling.