Radiant energy – Photocells; circuits and apparatus – Photocell controlled circuit
Patent
1996-03-14
1998-04-21
Allen, Stephone B.
Radiant energy
Photocells; circuits and apparatus
Photocell controlled circuit
250214DC, 250551, H01J 4014
Patent
active
057420459
ABSTRACT:
Configurable Optical Gates (COGs) are used to transmit and receive optical signals similar to an interconnect device as well as perform a logic function on those signals (they are smart pixels). COGs consist of a laser with an intracavity modulator, an integrated current source and one or more integrated photodetectors to drive the modulators. The devices are monolithically integrated on MultiQuantum Well (MQW) heterostructure. Certain logic functions require that the bottom N- contact which is under individual devices be accessible and electrically isolated from neighboring devices. For this reason, the laser heterostructure is grown on a semi-insulating substrate. Each COG has a built-in light baffle that prevents the laser emission from coupling into the photodetectors. The optical detection of the COG can be disabled during fabrication and the device can be directly modulated by conventional electronics.
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Kimmet James S.
Libby Stuart I.
Parker Michael A.
Swanson Paul D.
Allen Stephone B.
Auton William G.
Burstyn Harold L.
The United States of America as represented by the Secretary of
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