US3803511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gallium arsenide laser fiber coupling
Assignee: International Standard Electric Corp
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Filing: 1972-10-18
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Granted: 1974-04-09
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Expires: 1992-10-18
Abstract
Abstract The coupling of an injection laser diode into an optical fiber is improved by a short resonating length of fiber. A partially reflective layer is positioned at the remote end of the resonator section and a highly reflective layer with an aperture slit and anti-reflection layer in the slit are disposed at the laser end. A circulatory laser mode can also be improved using a resonator section with a matching interference layer at the coupling point. A rectangular contact strip confines current to the desired circulating area. Another variation includes two different coupling points with one more tightly coupled than the other for circulating light in one direction.
Inventors
- 👤 G Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:07
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/10; H01S5/1071; G; G02; G02B; G02B6/00; G02B6/24; G02B6/26; G02B6/30; G02B6/42; G02B6/4201; G02B6/4204; G02B6/4206; G02B6/421; H01S5/14; H01S5/146
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
37 words
The arrangement as claimed in claim 1 wherein said portion of optical fiber includes a partially reflecting surface at one end spaced from said laser and a highly reflecting surface at the opposite end adjacent said laser.
Claim 2
Dependent Claim
46 words
The arrangement as claimed in claim 2 wherein said laser is butt-coupled to said opposite end of said portion of said fiber through said highly reflecting surface, said highly reflecting surface including a slit interposed between said opposite end portion of said fiber and said laser.
Claim 3
Dependent Claim
15 words
The arrangement as claimed in claim 3 wherein said slit includes an anti-reflection interference layer.
Claim 4
Dependent Claim
76 words
The arrangement as claimed in claim 2 wherein said laser is adapted to lase in a circulatory mode between said side walls within said junction along a rectangular path having respective reflection points intermediate each of said side walls, said portion of optical fiber being attached along one side of said laser at a lengthwise position on said fiber intermediate said end surfaces so as to effect optical coupling with said laser at a reflection point.
Claim 5
Dependent Claim
51 words
The arrangement as claimed in claim 5 wherein said fiber includes an inner core and outer cladding, and a refractive index matching interference layer is interposed between said bore and the adjacent one side of said laser, said layer extending along a portion of said one side at a reflection point.
Claim 6
Dependent Claim
15 words
The arrangement as claimed in claim 6 wherein said layer is a three-quarter wavelength layer.
Claim 7
Dependent Claim
52 words
The arrangement as claimed in claim 6 including a second refractive index matching interference layer between said core and one side spaced further along said fiber from the first layer and from said highly reflecting surface, said second layer being more loosely coupled between said core and laser than said first layer.
Claim 8
Dependent Claim
16 words
The arrangement as claimed in claim 2 wherein the p-n junction region is of gallium arsenide.
Claim 9
Dependent Claim
19 words
The arrangement as claimed in claim 2 wherein the laser is of a Gallium Arsenide-Gallium Aluminum Arsenide double heterostructure.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |