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Liquid crystal 1 × N optical switch

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Abstract

The design, experimental results, and analysis of a 1 × N ferroelectric liquid-crystal optical switch based on polarization rotation are reported. The switch is broadband and tolerant to errors in the ferroelectric liquid-crystal tilt angle and cell thickness. Moreover, the cross talk in the switch is noncumulative and independent of the switch size N. The results of an experimental 1 × 4 switch are presented. The switch has a signal-to-cross-talk ratio ranging from 21.6 to 37.1 dB, a switching time of 50 μsec, and a worst-case insertion loss of 3.5 dB.

© 1990 Optical Society of America

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