Title:
LIQUID CRYSTAL VARIABLE OPTICAL ATTENUATOR
Document Type and Number:
WIPO Patent Application WO2004077105
Kind Code:
A3
Abstract:
A twisted nematic liquid crystal variable optical attenuator[100] is presented with one substrate that includes a integrated subwavelength nanostructured polarizer[111]. The device may incorporate an integrated isolator whereby a substrate of the liquid crystal sandwich is formed from doped garnet to comprise a faraday rotator etched with a subwavelength optical nanostructured polarizing grating and enabling the substrate to function as an isolator. The liquid crystal variable optical attenuator may include a deposited metal gasket moisture barrier[106] bonding the opposing top and bottom substrates each having a spacer layer[107] to accurately control cell gap thickness. The liquid crystal variable optical attenuator[100] may also include an integrated thermal sensor and heater deposition layer[ 108] sandwiched between or deposited on at least one or both opposing substrates.
Inventors:
CAVANAUGH SHANTI A
AUSTIN LINDSAY W
YOUNG MARK E
MOLINARI LOUIS J
AUSTIN LINDSAY W
YOUNG MARK E
MOLINARI LOUIS J
Application Number:
PCT/US2004/005310
Publication Date:
December 09, 2004
Filing Date:
February 21, 2004
Export Citation:
Assignee:
SPECTRASWITCH INC (US)
International Classes:
G02F1/09; G02F1/133; G02F1/1335; G02F1/1339; G02B; (IPC1-7): G02F1/1335
Foreign References:
| US5430561A | 1995-07-04 | |||
| US5914811A | 1999-06-22 | |||
| US6046851A | 2000-04-04 | |||
| US6144427A | 2000-11-07 |
Other References:
See also references of EP 1606669A4
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