Electrically controlled optical switch for multimode fiber applications
- 1 September 1980
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 19 (17) , 2921-2925
- https://doi.org/10.1364/ao.19.002921
Abstract
An electrically controlled optical switch based on polarization principles is described. It uses a liquid crystal twist cell that rotates polarization by 90°, and it operates on an ac voltage that switches between 0.8 and 2.5 V rms. The switch has a loss of ~0.4 dB, neglecting reflections, in an unpolarized incoherent beam and a cross-talk ratio of ~−20 dB. It operates in collimated light, but it can be applied to multimode fibers using collimating lenses, which are expected to add <0.8 dB to the loss.Keywords
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