Abstract

Three blocks of birefringent calcite and two 6-V twisted nematic liquid-crystal cells have been used to make a 2 × 2 optical bypass switch for series-type fiber-optic networks. Optical cross-talk levels of −32 dB have been obtained in both states. The insertion loss was 3 dB in a nonoptimized switch.

© 1982 Optical Society of America

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