Patent US5247168A successfully refreshed from Google Patents.
US5247168A
Expired / Lapsed
US
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Light frequency converter having laser device connected in series with photodetector
Assignee: Thales SA
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Filing: 1991-09-23
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Granted: 1993-09-21
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Expires: 2011-09-23
Abstract
Abstract A structure providing a monolithic integration of an optical detector with an optical transmitter working in the region of the visible or the near IR spectrum. This source type makes it possible to transpose a perceived image belonging to a wavelength region to another wavelength region with a good output (photons/electrons coupling). Such a device may find particular application in imagery and signal processing systems.
Inventors
- 👤 Jean-Paul Pocholle
- 👤 Michel Papuchon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:27
CPC Classifications
G; G02; G02F; G02F2/00; G02F2/02; H; H01; H01S; H01S5/00; H01S5/02; H01S5/026; H01S5/0262; H10; H10F; H10F55/00; H10F55/10; H10F55/15; H10F55/155; H01S5/06; H01S5/0607; H01S5/0608; H01S5/0609; H01S5/0611; H01S5/10; H01S5/18; H01S5/183
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
80 words
A light frequency converter comprising: a quantum multiwell or supernetwork photodetector formed of a group of layers and comprising a first and a second face, wherein light radiation to be converted is received on the first face and detected by the photodetector; a laser device placed on the second face of the photodetector having a plurality of semiconductor layers formed in a direction parallel to said group of layers of said photodetector and electrically connected in series with the photodetector.
Claim 2
Dependent Claim
80 words
A light frequency converter comprising: a quantum multiwell or supernetwork photodetector formed of a group of layers and comprising a first and a second face, wherein light radiation to be converted is received on the first face and detected by the photodetector; a laser device placed on the second face of the photodetector having a plurality of semiconductor layers formed in a direction parallel to said group of layers of said photodetector and electrically connected in series with the photodetector.
Claim 3
Dependent Claim
24 words
A light frequency converter according to claim 1, wherein the first face comprises a network for coupling the device with radiation to be detected.
Claim 4
Dependent Claim
31 words
A light frequency converter according to claim 1, wherein the photodetector is integral by its first face with a substrate receiving radiation to be detected and transmitting it to the photodetector.
Claim 5
Dependent Claim
30 words
A light frequency converter according to claim 3, wherein the substrate receiving the radiation to be detected has a network for coupling the substrate with the radiation to be detected.
Claim 6
Dependent Claim
54 words
A light frequency converter according to claim 1, further comprising: a first ohmic contact layer connected to the first face; a second ohmic contact layer connected to the second face and to the laser device; and a third ohmic contact layer connected to a fourth face opposite to a third face of the photodetector.
Claim 7
Dependent Claim
39 words
A light frequency converter according to claim 5, further comprising: a first voltage source connected between the first and the second ohmic contact layer; and a second voltage source connected between the second and the third ohmic contact layer.
Claim 8
Dependent Claim
24 words
A light frequency converts according to claim 1, wherein the photodetector consists of quantum multiwells and the laser device also consists of quantum multiwells.
Claim 9
Dependent Claim
21 words
A light frequency converter according to claim 7, wherein the photodetector consists of alternations of GaAs and Ga 1-x AlAs layers.
Claim 10
Dependent Claim
24 words
A light frequency converter according to claim 7, wherein the laser device consists of alternations of AlAs and Ga 1- Al x As layers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-09-20 | 1997-03-22 | 1997-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-20 | 2001-03-22 | 2001-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-20 | 2005-03-22 | 2005-09-21 | $7700.00 | Window Closed / Lapsed |