US4405236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor ring laser apparatus
Assignee: ISHIZAKA SEIICHI PRESIDENT OF KOGYO GIJUTSUIN DENSHIGIJUTSU SOGOKENKYUSHO
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Filing: 1981-08-13
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Granted: 1983-09-20
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Expires: 2001-08-13
Abstract
Abstract A semiconductor ring laser apparatus is provided which comprises a semiconductor laser element having a waveguide region therein and parallel cleavage planes formed between the waveguide region and the medium adjacent thereto. The waveguide region is inclined at a Brewster angle with respect to the normal to the cleavage planes in relation to the medium of the waveguide region and the adjacent medium, and optical means which have a ring-formed optical path are optically coupled to the waveguide region for receiving light therefrom through one of the cleavage planes. These optical means return at least a portion of the light from one of the cleavage planes to the other of the cleavage planes, with the semiconductor laser element and the optical means thereby forming a ring laser oscillator.
Inventors
- 👤 Yoshinobu Mitsuhashi
- 👤 Junichi Shimada
- 👤 Kenjiro Sakurai
- 👤 Yukinobu Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:07
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/08; H01S3/081; H01S3/083; G; G01; G01C; G01C19/00; G01C19/58; G01C19/64; G01C19/66; H01S5/00; H01S5/10; H01S5/1071
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A semiconductor ring laser apparatus comprising a semiconductor laser element having a waveguide region therein and parallel cleavage planes formed between said waveguide region and medium adjacent thereto, wherein the waveguide region is inclined at a Brewster angle with respect to the normal to the cleavage planes in relation to the medium of the waveguide region and said adjacent medium, and optical means having a ring-formed optical path optically coupled to said waveguide region for receiving light therefrom through one of said cleavage planes and returning at least a portion of the light therefrom to the other of the cleavage planes, said semiconductor laser element and said optical means thereby forming a ring laser oscillator.
Claim 2
Dependent Claim
115 words
A semiconductor ring laser apparatus comprising a semiconductor laser element having a waveguide region therein and parallel cleavage planes formed between said waveguide region and medium adjacent thereto, wherein the waveguide region is inclined at a Brewster angle with respect to the normal to the cleavage planes in relation to the medium of the waveguide region and said adjacent medium, and optical means having a ring-formed optical path optically coupled to said waveguide region for receiving light therefrom through one of said cleavage planes and returning at least a portion of the light therefrom to the other of the cleavage planes, said semiconductor laser element and said optical means thereby forming a ring laser oscillator.
Claim 3
Dependent Claim
34 words
A semiconductor ring laser apparatus as set forth in claim 1 wherein said optical means includes separating means for separating a portion of the light in said optical means into two oppositely oriented components.
Claim 4
Dependent Claim
19 words
A semiconductor ring laser apparatus as set forth in claim 2 wherein said separating means comprises a beam splitter.
Claim 5
Dependent Claim
49 words
A semiconductor ring laser apparatus as set forth in any one of claims 1-3 wherein said optical means comprises lens means in said adjacent medium for focusing the light emitted by said semiconductor laser element and a plurality of mirrors for reflecting said focused light along said ring path.
Claim 6
Dependent Claim
22 words
A semiconductor ring laser apparatus as set forth in any one of claims 1-3 wherein said optical means includes an optical fiber.
Claim 7
Dependent Claim
35 words
A semiconductor ring laser apparatus as set forth in claim 5 wherein said optical fiber contacts said waveguide regions of said semiconductor laser element along the cleavage planes thereof and is thereby said adjacent medium.
Claim 8
Dependent Claim
23 words
A semiconductor ring laser apparatus as set forth in claim 5 wherein said separating means comprises a diverged portion of said optical fiber.
References Cited (Backward Citations)
US3484713A
Cited
US3605037A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |