Optical switch attenuator

Details Optical switch attenuator Optical switch attenuator

1981-09-03

1983-10-18

Corbin, John K.

350356, G02F 113

Patent

active

044102380

ABSTRACT:
An optical switch having low insertion loss and low crosstalk is provided by two slabs of birefringent material having a polarization rotator as a control element interposed therebetween. By controlling the polarization rotator electrically, a selectable ratio of transmitted-to-displaced output optical power is realized. The optical switch therefore can function as an attenuator to a light beam traversing through it. In the preferred embodiment calcite crystals are used for the slabs, and a liquid crystal cell for the polarization rotator.

REFERENCES:
Berezin, P. D. et al., "Liquid Crystal Deflector," Soviet J. of Quantum Electronics,vol.4, No. 5 (Nov.1974) pp. 693-694.
Ley, J. M., Comment in Electronics Letters, vol. 2, pp. 138-139 (Apr. 1966).
Ley, J. M. "Low-Voltage Light-Amplitude Modulation" Electronics Letters, vol. 2, p. 12 (1966).

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