US4082419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical waveguide couplers
Assignee: International Standard Electric Corp
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Filing: 1976-02-23
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Granted: 1978-04-04
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Expires: 1996-02-23
Abstract
Abstract An optical directional coupler provides good guidance in the lateral direction by the use of projecting rib optical waveguide structure. One embodiment enables the use of sharper curves in the integrated optical circuitry with reduced optical loss.
Inventors
- 👤 George Horace Brooke Thompson
- 👤 David Francis Lovelace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:09
CPC Classifications
G; G02; G02F; G02F1/00; G02F1/29; G02F1/31; G02F1/313; G02F1/3132; G02F1/3133; G02F2201/00; G02F2201/06; G02F2201/063; G02F2202/00; G02F2202/10; G02F2202/101
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
97 words
A semiconductive heterostructure optical waveguide coupler comprising: a first layer of semiconductive material having first and second major surfaces; a plurality of protruding ribs of semi-conductive material formed on said first surface, said ribs defining a plurality of optical waveguides for providing optical confinement to light; means for applying a reverse bias across said ribs and said first layer to provide a depletion region within said first layer for altering the optical coupling between the waveguides; and a plurality of regions of semi-insulating material within the portions of said first layer intermediate said plurality of protruding ribs.
Claim 2
Dependent Claim
97 words
A semiconductive heterostructure optical waveguide coupler comprising: a first layer of semiconductive material having first and second major surfaces; a plurality of protruding ribs of semi-conductive material formed on said first surface, said ribs defining a plurality of optical waveguides for providing optical confinement to light; means for applying a reverse bias across said ribs and said first layer to provide a depletion region within said first layer for altering the optical coupling between the waveguides; and a plurality of regions of semi-insulating material within the portions of said first layer intermediate said plurality of protruding ribs.
Claim 3
Dependent Claim
24 words
The optical waveguide coupler of claim 1 wherein said first layer comprises n-type GaAs and the semiconductive material within the ribs comprises p-type GaAlAs.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-03 | 1981-10-03 | 1982-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-03 | 1985-10-03 | 1986-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-03 | 1989-10-03 | 1990-04-04 | $7700.00 | Window Closed / Lapsed |