Optical switches made by nematic liquid crystal switchable mirrors, and apparatus of manufacture
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United States of America Patent
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Feb 14, 2006
Grant Date -
N/A
app pub date -
Oct 28, 2002
filing date -
Oct 26, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Technology for constructing a single layer polarization insensitive electrically switchable liquid crystal mirror is disclosed which serves as the basic element for constructing an optical router switch array in free space as well as waveguide format. The optical router switch array includes a plurality of switchable liquid crystal mirror elements having liquid crystal arranged in stack cells and/or in a waveguide configuration. The resulted optical router switches are motionless, polarization insensitive, stable within the operational spectral region, and stable versus temperature. The invention also includes methods for manufacturing a single switchable liquid crystal mirror element and the optical switch arrays. The same technology is further extended to constructing an electrically tunable optical filter that is motionless and polarization insensitive.
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