Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Patent
1996-04-10
1997-02-25
Sikes, William L.
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
385 14, 385 31, 385 39, G02F 11335, G02B 612, G02B 626
Patent
active
056064390
ABSTRACT:
In all-optical networks, optical switching and routing become the most important issues for interconnecting the transport network layers. This invention describes a novel tunable optical add/drop filter for the all-optical wavelength-division-multiplexing (WDM) network applications. This filter can add or drop part of the high transmission capacity signals of a WDM link. It can be used to decentralized access point in the access network or as small core network node to realizing branching points in the network topology. It works in both wavelength and space domains. It has the advantages of: 1) High throughput and low voltage operation; 2) Wide tuning range and therefore, high channel capacity; 3) High isolation and high directivity between input and output ports; 4) Compact device packaging is possible as compares to the conventional grating and mechanical switching type of add/drop filter; 5) Multiple ports add/drop tunable filters can be realized with this invention to interconnect multiple WDM networks. This novel add/drop filter can be used in various WDM topologies. It enhances the performance of the conventional tunable filter by re-routing the rejected wavelengths back to network, which not only save the precious optical energy, but also cut down the return loss of the device.
REFERENCES:
patent: 5132826 (1992-07-01), Johnson et al.
patent: 5231521 (1993-07-01), Johnson et al.
patent: 5243455 (1993-09-01), Johnson et al.
patent: 5245451 (1993-09-01), Wu et al.
patent: 5303314 (1994-04-01), Duling, III, et al.
patent: 5450427 (1995-09-01), Fermann et al.
patent: 5469455 (1995-11-01), Reitz et al.
patent: 5481402 (1996-01-01), Cheng et al.
patent: 5488679 (1996-01-01), Wu
patent: 5513194 (1996-04-01), Tamura et al.
Macro-Vision Technology , Inc.
Nguyen Tsep H.
Sikes William L.
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