Optical router switch array and method for manufacture

Liquid crystal cells – elements and systems – Particular structure – Interconnection of plural cells in series

Reexamination Certificate

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Details

C349S113000, C349S177000, C349S185000, C349S201000, C359S015000, C359S432000

Reexamination Certificate

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06885414

ABSTRACT:
An optical router switch array includes a plurality of switchable mirror elements having holographic liquid crystal arranged in stack cells. Each of the mirror elements is isolated electrically from the other switchable mirror elements by a plurality of substrates alternative arranged between the switchable mirror elements. Holographic gratings are formed on the holographic liquid crystal by exposure to holography at predetermined incident angles. A single switchable mirror element can also be provided in cases where an array is not required. The switchable mirror elements are polarization insensitive, stable within the operational spectral region, and stable versus temperature. The invention also includes methods for manufacturing a single switchable mirror element and the optical arrray.

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