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Optical Review

Logical and relational operations of optical bistable devices operating without external bias

Young‐Wan Choi, Kwangjoon Kim, O-Kyun Kwon

Published Nov 1, 1996• 0 citations
Publisher
DOI
10.1007/bf02935953

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Optical bistable devices [1] are being developed with a view to their use as logic gates in optical processors [2]. The response of an optical bistable device is strongly nonlinear and once a device has been fabricated, its behaviour as a logic gate can still be modified to a large extent by the variation of certain parameters used to bias the device, Important responses include the device’s fanout potential, its switching speed and the contrast between its high and low output levels. Because of the complexity of the behaviour, it can be difficult to see how one response varies as another is improved. The method of ‘operating curves’ explained here allows a system designer to see how optimum performance may be attained.