OPTICAL WAVEGUIDING DEVICES

摘要

An integrated optical frequency multiplexing/demultiplexing device has a series of thin film waveguides having ribs (10, 11, 12) each partially overlaid with a tongue (13, 14) which also acts as a waveguide and feeds the next higher waveguide. Only within the region where a rib is overlaid by a tongue are the phase velocities sufficiently matched to provide coupling between waveguides at different levels. The use of semiconductive materials allows an integrated optical/ electrical compound to be fabricated.