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Reconfigurable multilevel phase holograms for optical switches

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4 Author(s)
Manolis, I.G. ; Dept. of Eng., Cambridge Univ., UK ; Wilkinson, T.D. ; Redmond, M.M. ; Crossland, W.A.

A way of dynamically encoding polarization-insensitive multilevel phase holograms using nematic liquid crystals is presented. The method, using a quarter wave plate and a mirror, allows the optical efficiency of a free space single-mode fiber-to-fiber switch to be greatly enhanced. The validity of the approach has been verified experimentally by observing the power diffracted in the /spl plusmn/1 orders of a nematic liquid crystal grating as a function of input polarization and applied voltage.

Published in:

Photonics Technology Letters, IEEE  (Volume:14 ,  Issue: 6 )

Date of Publication:

June 2002

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