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Wave propagation in thin-film optical waveguides using gyrotropic or anisotropic material as substrate is studied. At the film-substrate boundary, the relation between the incident and reflected fields can be expressed in terms of a scattering matrix with matrix elements representing the TE-to-TE and TM-to-TM reflection coefficients and the TE-to-TM and TM-to-TE conversion factors. The property of the scattering matrix is examined, and the condition for continuous and complete mode conversion is derived. Various schemes to achieve complete mode conversion are proposed and the performance characteristics, including the physical dimension and the tolerances in the incident angle and film thickness, for several mode-converting structures are computed and compared. Once the practicability of complete mode conversion is established, it is possible to study the feasibility of practical devices. Various schemes for the realization of such devices as the gyrator, the isolator, the optical switch, and the nondestructive read out are proposed.

The Jitney Parallel Optical In~erconnect consists of a transmitter module, a receiver module, and a cable capable of sending 1 GigaByteIsec over 1-100 meter spans. This technology has been developed to be cost competitive with copper bus technology, while still offering all the features of optical interconnects.