Photonic switching networks will provide dynamic allocation of fiber-optic network resources. Requirements of the physical layer include a high channel bandwidth for the throughput of ultrahigh-bandwidth information, fast switching speeds, and optical processing of switching control algorithms to remove the speed bottleneck imposed by electronic processing.1 Integrated optic waveguide switches offer a channel bandwidth transparency comparable with that of the fiber itself. Recently, complex integrated-optic switching structures such as a Ti:LiNbO3 8 X 8 crossbar switch matrix have been fabricated.2-4 Optical control of a self-routing protocol has also recently been reported and discussed.5 With these advances in channel transparency, switching speed. and control processing speed, the photonic switch will be compatible with the bandwidth of the fiber-optic network. Understanding the high-speed switching characteristics of integrated optic switch matrices is necessary to optimize the performance of photonic switching networks.

© 1988 Optical Society of America

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