US4675873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single mode injection laser structure
Assignee: Iconectiv LLC
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Filing: 1986-04-21
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Granted: 1987-06-23
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Expires: 2006-04-21
Abstract
Abstract The present invention pertains to an injection laser which advantageously suppresses mode-partition-noise. The laser comprises a laser cavity with a gain or active material and means for providing a small amplitude wavelength selective loss. In one embodiment of the present invention the means for providing a small amplitude loss is a wavelength selective reflector.
Inventors
- 👤 Stewart E. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:37
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/10; H01S5/14; H01S5/141; H01S5/20; H01S5/22
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
111 words
An injection laser which comprises: an active laser region having a first end which is a partial reflector of laser radiation generated in the active laser region, means for injection pumping the active laser region to produce laser radiation, a first separate laser partial reflector of the laser radiation disposed to form a laser cavity between the first end and the first separate laser partial reflector, the laser cavity having a main mode, wherein the first separate laser partial reflector has a value of reflectivity at the wavelength of the main mode that is less than 10% higher than its reflectivity values at the wavelengths of modes than the main mode.
Claim 2
Dependent Claim
111 words
An injection laser which comprises: an active laser region having a first end which is a partial reflector of laser radiation generated in the active laser region, means for injection pumping the active laser region to produce laser radiation, a first separate laser partial reflector of the laser radiation disposed to form a laser cavity between the first end and the first separate laser partial reflector, the laser cavity having a main mode, wherein the first separate laser partial reflector has a value of reflectivity at the wavelength of the main mode that is less than 10% higher than its reflectivity values at the wavelengths of modes than the main mode.
Claim 3
Dependent Claim
89 words
An injection laser which comprises: an active laser region, means for injection pumping the active laser region to produce laser radiation, first and second separate partial reflectors of the laser radiation disposed on either side of the active laser region to form a laser cavity therebetween and having a main mode, wherein the first separate partial reflector has a value of reflectivity at the wavelength of the main mode that is less than 10% higher than its reflectivity values at the wavelengths of modes other than the main mode.
Claim 4
Dependent Claim
89 words
An injection laser which comprises: an active laser region, means for injection pumping the active laser region to produce laser radiation, first and second separate partial reflectors of the laser radiation disposed on either side of the active laser region to form a laser cavity therebetween and having a main mode, wherein the first separate partial reflector has a value of reflectivity at the wavelength of the main mode that is less than 10% higher than its reflectivity values at the wavelengths of modes other than the main mode.
Claim 5
Dependent Claim
21 words
The injection laser claimed in accordance with claims 1 or 2 wherein the first separate partial reflector is a multilayered dielectric.
Claim 6
Dependent Claim
20 words
The injection laser claimed in accordance with claims 1 or 2 wherein the first separate partial reflector is a grating.
Claim 7
Dependent Claim
18 words
The injection laser claimed in accordance with claim 4 wherein the grating is formed in LiNbO 3 .
Claim 8
Dependent Claim
43 words
The injection laser claimed in accordance with claim 5 wherein the first separate partial reflector further comprises metal electrodes disposed across the grating and a variable source of voltage applied across the electrodes whereby a variable electric field is applied to the grating.
Claim 9
Dependent Claim
17 words
The injection laser claimed in accordance with claim 4 wherein the grating is formed in fused silica.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |