Abstract
Future optical communication and computer interconnect systems will require complex switching networks. Computer applications, in particular, may require monolithic, non-blocking switching networks of at least 100 × 100 elements. Numerous integrated-optical switch designs have been described and demonstrated with low insertion losses and high switching speeds.1 To . date, however, the highest level of integration achieved is a 16 × 16 LiNbO3 switch array on a 60 mm long substrate.2 One reason why these switch designs can’t be integrated to higher levels is the geometry of the basic device which consists of waveguides running in parallel or crossing at very small angles. This results in a device cell which is very long and thin and thus does not efficiently use substrate area. In addition, the near parallel waveguide geometry usually mandates the use of bends for waveguide separation which further increase overall switch area.
© 1993 Optical Society of America
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