Patent US3855546A successfully refreshed from Google Patents.
US3855546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Folded lobe large optical cavity laser diode
Assignee: Texas Instruments Inc
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Filing: 1973-09-21
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Granted: 1974-12-17
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Expires: 1993-09-21
Abstract
Abstract An improved large optical cavity laser diode in which a beam reflecting surface is formed as part of the diode package to provide a folded lobe having a beam divergence which is reduced to 25* or less and requires no alignment for proper operation.
Inventors
- 👤 D Carr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:58
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
64 words
An improved large optical cavity laser diode arrangement comprising: a) means having at least one plane surface which is light reflecting; and b) an optical cavity laser diode mounted on said plane surface such that one of the two major lobes emitted by the laser diode is reflected so as to have its major axis parallel to the major axis of the other lobe.
Claim 2
Dependent Claim
64 words
An improved large optical cavity laser diode arrangement comprising: a) means having at least one plane surface which is light reflecting; and b) an optical cavity laser diode mounted on said plane surface such that one of the two major lobes emitted by the laser diode is reflected so as to have its major axis parallel to the major axis of the other lobe.
Claim 3
Dependent Claim
58 words
The invention according to claim 1 wherein said optical cavity laser diode comprises: a) a substrate; b) a grown N-type GaAlAs layer atop said substrate; c) a grown N-type GaAs layer atop said N-type GaAlAs layer; d) a P-type GaAs layer atop said GaAs N-type layer; and e) a grown P-type GaAlAs layer atop said P-type GaAs layer.
Claim 4
Dependent Claim
19 words
The invention according to claim 2 wherein the substrate of said laser diode is mounted on said plane surface.
Claim 5
Dependent Claim
14 words
The invention according to claim 1 wherein said plane surface is coated with gold
Claim 6
Dependent Claim
20 words
The invention according to claim 1 wherein said plane surface comprises the surface of a header of a semiconductor package.
Claim 7
Dependent Claim
53 words
The invention according to claim 5 wherein the surface of said header on which said laser diode is mounted is in a plane making an angle with the axis of said header which angle is equal to one half the beam divergence angle of the two major lobes emitted by said laser diode.
Claim 8
Dependent Claim
29 words
The invention according to claim 6 wherein said laser diode has metal alloyed at least to the side contacting said header and said diode is soldered to said header.
Claim 9
Dependent Claim
28 words
The invention according to claim 7 and further including a case surrounding said diode and header said case having a window for the beam emitted by said diode.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |