US4815088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductor laser array device
Assignee: Sharp Corp
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Filing: 1987-10-05
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Granted: 1989-03-21
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Expires: 2007-10-05
Abstract
Abstract A semiconductor laser array device with a waveguide structure comprising waveguides designed such that the widths thereof gradually increase from the center waveguide to the waveguides positioned at both sides of the array portions.
Inventors
- 👤 Mitsuhiro Matsumoto
- 👤 Sadayoshi Matsui
- 👤 Mototaka Taneya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:23
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/40; H01S5/4025; H01S5/4031; H01S5/4068
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
181 words
A semiconductor laser array device with a waveguide structure comprising: a first array portion which is composed of n waveguides that are disposed in a parallel manner with an optical phase-coupling between the adjacent waveguides with a certain pitch, said waveguides being designed such that the widths thereof gradually increase from the center waveguide to the waveguides positioned at both sides of the first array portion (wherein n is an odd number greater than 2), a second array portion which is composed of (n-1) waveguides that are disposed opposite the waveguides of the first array portion and in a parallel manner with an optical phase-coupling between the adjacent waveguides with a certain pitch, said waveguides being designed such that the widths thereof gradually increase from the center waveguides to the waveguides positioned at both sides of the second array portion, and a third array portion which is composed of a plurality of symmetrically branching waveguides that optically connect the tapered portions of the waveguides of the first array portion with the tapered portions of the waveguides of the second array portion.
Claim 2
Dependent Claim
181 words
A semiconductor laser array device with a waveguide structure comprising: a first array portion which is composed of n waveguides that are disposed in a parallel manner with an optical phase-coupling between the adjacent waveguides with a certain pitch, said waveguides being designed such that the widths thereof gradually increase from the center waveguide to the waveguides positioned at both sides of the first array portion (wherein n is an odd number greater than 2), a second array portion which is composed of (n-1) waveguides that are disposed opposite the waveguides of the first array portion and in a parallel manner with an optical phase-coupling between the adjacent waveguides with a certain pitch, said waveguides being designed such that the widths thereof gradually increase from the center waveguides to the waveguides positioned at both sides of the second array portion, and a third array portion which is composed of a plurality of symmetrically branching waveguides that optically connect the tapered portions of the waveguides of the first array portion with the tapered portions of the waveguides of the second array portion.
Claim 3
Dependent Claim
34 words
A semiconductor laser array device according to claim 1, wherein the effective refractivities of the individual waveguides of the first and second array portions increase with an increase in the widths of said waveguides.
Claim 4
Dependent Claim
18 words
A semiconductor laser array device according to claim 1, wherein said waveguide structure is of a ridged type.
References Cited (Backward Citations)
US4255717A
Cited
JPS60130184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-20 | 1992-09-19 | 1993-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-20 | 1996-09-19 | 1997-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-20 | 2000-09-19 | 2001-03-21 | $7700.00 | Window Closed / Lapsed |