US4583226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coupled cavity injection laser
Assignee: Nokia Bell Labs
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Filing: 1983-07-28
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Granted: 1986-04-15
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Expires: 2003-07-28
Abstract
Abstract Described is an internally mode stabilized injection laser. Stabilization is obtained in a coupled cavity structure where one cavity is passive. The passive cavity is a high efficiency waveguide with dimensions chosen to suppress unwanted modes.
Inventors
- 👤 Kang Liou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:54
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/10; H01S5/14; H01S3/00; H01S3/05; H01S3/08; H01S3/081; H01S3/082; H01S5/02; H01S5/022; H01S5/0225; H01S5/02251; H01S5/023; H01S5/02325; H01S5/06; H01S5/065; H01S5/0651; H01S5/0653; H01S5/0654; H01S5/1039
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
Laser device comprising an injection laser and a coupled cavity means situated adjacent the injection laser for influencing the mode structure of the output of the injection laser the invention characterized in that said coupled cavity means comprises a graded index lens with its axis aligned to the output axis of the injection laser, and a reflecting coating on a surface of the graded index lens so that light emerging from the injection laser traverses an optical path through the graded index lens and onto said reflective coating the invention further characterized in that the length of the optical path through the coupled cavity is less than the length of the optical path in the injection laser.
Claim 2
Dependent Claim
117 words
Laser device comprising an injection laser and a coupled cavity means situated adjacent the injection laser for influencing the mode structure of the output of the injection laser the invention characterized in that said coupled cavity means comprises a graded index lens with its axis aligned to the output axis of the injection laser, and a reflecting coating on a surface of the graded index lens so that light emerging from the injection laser traverses an optical path through the graded index lens and onto said reflective coating the invention further characterized in that the length of the optical path through the coupled cavity is less than the length of the optical path in the injection laser.
Claim 3
Dependent Claim
19 words
The device of claim 1 in which the graded index lens is a short length of glass fiber waveguide.
Claim 4
Dependent Claim
25 words
The device of claim 1 in which the length of the optical path one way through the coupled cavity is slightly less than 1/4 pitch.
References Cited (Backward Citations)
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Cited
US4278322A
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US4358851A
Cited
US4485474A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |