Patent EP0323073A2 successfully refreshed from Google Patents.
EP0323073A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Wavelength conversion using self electrooptic effect devices
Assignee: AT&T Inc
•
Filing: 1988-12-13
•
Granted: —
•
Expires: 2008-12-13
Abstract
Abstract Information borne by an optical signal at first wavelength ( lambda 1) is transferred intact to another optical signal at a second and different wavelength ( lambda 2) and vice versa via an optoelectronic circuit employing quantum well devices (2,4) connected serially to facilitate self electrooptic effects therein. The optoelectronic circuit accepts two input signals (30,31)) and provides two output signals (32,33) wherein an input signal and its corresponding output signal are the same wavelength. Bidirectional information transfer equivalent to bidirectional wavelength conversion is permitted b the optoelectronic circuit.
Inventors
- 👤 Israel Bar-Joseph
- 👤 Daniel Simon Chemla
- 👤 David Andrew Barclay Miller
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 16:35
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/01; G02F1/015; G02F1/017; G02F1/01716; B; B82; B82Y; B82Y20/00; G02F2/00; G02F2/004; G02F3/00; G02F3/02; G02F3/028
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
An optical device comprising first means (2) including a light-sensitive quantum well region (22) and second means (4) including a quantum well region (42), said first means connected electrically in series with said second means for electrically controlling an optical absorption or an index of refraction in the quantum well region of said second means, CHARACTERISED IN THAT said quantum well region of said first means includes semiconductor material such that it is sensitive to light of a first wavelength (λ₁), said quantum well region of said second means includes semiconductor material such that the said controlled optical absorption or refractive index is that which applies to light of a second wavelength (λ₂) said first and second wavelengths being different from each other.
Claim 2
Dependent Claim
123 words
An optical device comprising first means (2) including a light-sensitive quantum well region (22) and second means (4) including a quantum well region (42), said first means connected electrically in series with said second means for electrically controlling an optical absorption or an index of refraction in the quantum well region of said second means, CHARACTERISED IN THAT said quantum well region of said first means includes semiconductor material such that it is sensitive to light of a first wavelength (λ₁), said quantum well region of said second means includes semiconductor material such that the said controlled optical absorption or refractive index is that which applies to light of a second wavelength (λ₂) said first and second wavelengths being different from each other.
Claim 3
Dependent Claim
25 words
A device as claimed in claim 1 wherein said first and second means are p-i-n diodes having the quantum well regions in the i-regions thereof.
Claim 4
Dependent Claim
16 words
A device as claimed in claim 2 wherein said quantum well regions comprise multiple quantum wells.
Claim 5
Independent Claim
18 words
A device as claimed in any of the preceding claims wherein the semiconductor materials are Group III-V compounds.
Claim 6
Dependent Claim
47 words
A device as claimed in claim 4 wherein the semiconductor material of said quantum well region in said first means consists of compounds from the AlGaAs/GaAs system and the semiconductor material of said quantum well region in said second means consists of compounds from the InGaAs/InP system.
Claim 7
Dependent Claim
47 words
A device as claimed in claim 4 wherein the semiconductor material of said quantum well region in said first means consists of compounds from the InGaAs/InGaAsP system and the semiconductor material of said quantum well region in said second means consists of compounds from the InGaAsP/InP system.
Claim 8
Independent Claim
49 words
A device as claimed in any of the preceding claims wherein said second means is also sensitive to light at said second wavelength for electrically controlling the optical absorption or index of refraction applying to light of said first wavelength in the quantum well region of said first means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.