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1. (WO2001025848) OPTICAL SWITCHING WITH FERROELECTRIC LIQUID CRYSTAL SLMS

Pub. No.:    WO/2001/025848    International Application No.:    PCT/GB2000/003810
Publication Date: Apr 12, 2001 International Filing Date: Oct 4, 2000
IPC: G02B 5/32
G02B 6/26
G02B 6/32
G02B 6/35
G02F 1/13363
G02F 1/139
G02F 1/141
G02F 1/31
G03H 1/08
Applicants: THOMAS SWAN & CO., LTD.
WARR, Steven
TAN, Kim, Leong
CROSSLAND, William
MANOLIS, Ilias
REDMOND, Maura
WILKINSON, Timothy
HOLMES, Melanie
ROBERTSON, Brian
Inventors: WARR, Steven
TAN, Kim, Leong
CROSSLAND, William
MANOLIS, Ilias
REDMOND, Maura
WILKINSON, Timothy
HOLMES, Melanie
ROBERTSON, Brian
Title: OPTICAL SWITCHING WITH FERROELECTRIC LIQUID CRYSTAL SLMS
Abstract:
An optical switch uses two ferroelectric liquid crystal spatial light modulators (10, 11) with an interconnect region in between. The switch uses bulk lenses (2, 8) to focus light from an input fibre array (1) to a first spatial light modulator (10), and from the second spatial light modulator (11) to an output array (9). Each spatial light modulator displays a respective hologram selected from a previously calculated set, to cause a desired switching of light from the input fibre array to the output array.