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2010-12-08T20:08:36+01:00
2010-11-01T22:32:06Z
2010-12-08T20:08:36+01:00
Jouve S.A., EPO - Publication - KB, TaggedPDF v1.27
EP-0323074-A2-19890705
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EP-0323074-A2-19890705
A tri-state optical device 400 is disclosed having photodiodes 401 and 402 with respective quantum-wells 403 and 404 in the intrinsic regions. The photodiodes are connected in series with a bipolar switch 406 and a source of electrical potential 405 for emitting a pair of optical output beams having various combinations of power levels depending on the state of the bipolar switch and the ratio of two optical control beams incident on the photodiodes. In one state of the tri-state device with the bipolar switch in a conducting state, the two output beams have complementary high and low power levels representing, for example, high and low logic levels "1" and "0". In a second state, the power levels of the two output beams are reversed, thus exhibiting complementary and symmetric output power levels. In the third state when the bipolar switch of the tri-state device in in a nonconducting state, the output beams both exhibit a low power level, and the tri-state device is nonresponsive to the power levels of the optical control beams.
A tri-state optical device 400 is disclosed having photodiodes 401 and 402 with respective quantum-wells 403 and 404 in the intrinsic regions. The photodiodes are connected in series with a bipolar switch 406 and a source of electrical potential 405 for emitting a pair of optical output beams having various combinations of power levels depending on the state of the bipolar switch and the ratio of two optical control beams incident on the photodiodes. In one state of the tri-state device with the bipolar switch in a conducting state, the two output beams have complementary high and low power levels representing, for example, high and low logic levels "1" and "0". In a second state, the power levels of the two output beams are reversed, thus exhibiting complementary and symmetric output power levels. In the third state when the bipolar switch of the tri-state device in in a nonconducting state, the output beams both exhibit a low power level, and the tri-state device is nonresponsive to the power levels of the optical control beams.
en
European Patent Office
EP0323074
EP 0323074
G02F 03/00
H01L 31/10
H01L 27/14
Tri-state optical device
Tri-state optical device - European Patent Office - EP 0323074 A2
Tri-state optical device - European Patent Office - EP 0323074 A2
Adobe PDF Library 8.0
"EP0323074"; "EP 0323074"; "G02F 03/00"; "H01L 31/10"; "H01L 27/14"; "Tri-state optical device"
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0323074
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88311780
1988-12-13
US
140198
1987-12-31
G02F 03/00
H01L 31/10
H01L 27/14
AMERICAN TELEPHONE AND TELEGRAPH COMPANY
Lentine, Anthony Lodovico
Tri-state optical device
Optische Anordnung mit drei Stellungen
Tri-state optical device
Dispositif optique à trois états
A tri-state optical device 400 is disclosed having photodiodes 401 and 402 with respective quantum-wells 403 and 404 in the intrinsic regions. The photodiodes are connected in series with a bipolar switch 406 and a source of electrical potential 405 for emitting a pair of optical output beams having various combinations of power levels depending on the state of the bipolar switch and the ratio of two optical control beams incident on the photodiodes. In one state of the tri-state device with the bipolar switch in a conducting state, the two output beams have complementary high and low power levels representing, for example, high and low logic levels "1" and "0". In a second state, the power levels of the two output beams are reversed, thus exhibiting complementary and symmetric output power levels. In the third state when the bipolar switch of the tri-state device in in a nonconducting state, the output beams both exhibit a low power level, and the tri-state device is nonresponsive to the power levels of the optical control beams.
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