Patent US4764936A successfully refreshed from Google Patents.
US4764936A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor laser array device
Assignee: Sharp Corp
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Filing: 1986-08-28
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Granted: 1988-08-16
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Expires: 2006-08-28
Abstract
Abstract A semiconductor laser array device comprising an oscillation operating area provided with a plurality of first index-waveguides in a parallel manner and a non-oscillation operating area provided with a plurality of second index-waveguides in a parallel manner through which laser light produced in said oscillation operating area are guided through the waveguide from said oscillation operating area to the end facets of the second index-waveguides of said non-oscillation operating area, wherein the second index-waveguides are different in length between the adjacent waveguides and the end facet of each of the second index-waveguides does not function as a cavity facet of the laser but it functions as the light-emitting facet of the device.
Inventors
- 👤 Mototaka Taneya
- 👤 Mitsuhiro Matsumoto
- 👤 Hidenori Kawanishi
- 👤 Sadayoshi Matsui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:05
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/20; H01S5/22; H01S5/40; H01S5/4025; H01S5/4031
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
118 words
In a semiconductor laser array device comprising an oscillation operating area provided with a plurality of first index-waveguides in a parallel manner: a non-oscillation operating area provided with a plurality of second index-waveguides in a parallel manner connected or coupled to said oscillation operating area, where each second index-waveguides differs in length from adjacent parallel second index-waveguides, said oscillation operating area and said non-oscillation operating area being formed monolithically and arranged such that laser beams are guided through said first index-waveguides from said oscillation operating area to the end facets of said second index-waveguides, where the other facets of said second index-wveguides function not as cavity facets of the laser but as the light-emitting facets of the device.
Claim 2
Dependent Claim
118 words
In a semiconductor laser array device comprising an oscillation operating area provided with a plurality of first index-waveguides in a parallel manner: a non-oscillation operating area provided with a plurality of second index-waveguides in a parallel manner connected or coupled to said oscillation operating area, where each second index-waveguides differs in length from adjacent parallel second index-waveguides, said oscillation operating area and said non-oscillation operating area being formed monolithically and arranged such that laser beams are guided through said first index-waveguides from said oscillation operating area to the end facets of said second index-waveguides, where the other facets of said second index-wveguides function not as cavity facets of the laser but as the light-emitting facets of the device.
Claim 3
Dependent Claim
82 words
A semiconductor laser array device according to claim 1, wherein said oscillation operating area comprises an active layer and a current and light blocking layer positioned above said active layer, said first index-waveguides formed within said active layer corresponding to a plurality of parallel channels in said current and light blocking layer, and said second index-waveguides composed of a plurality of parallel light-permeable ridges which have a refractive index larger than 1 and which extend along the direction of said first index-waveguides.
Claim 4
Dependent Claim
25 words
A semiconductor laser array device according to claim 1, wherein the proportion of light reflected from the light-emitting facets of said second index-waveguides is 3%.
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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |