US4053914A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light emissive diode
Assignee: ITT Inc
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Filing: 1975-09-09
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Granted: 1977-10-11
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Expires: 1995-09-09
Abstract
Abstract A high radiance light emissive diode has a linear drive/output characteristic by providing the active region in a mesa structure with tapering sides so that super-radiant light emitted parallel with the junction is reflected and combined with the sublinear component emitted normal to the junction.
Inventors
- 👤 Anthony Richard Goodwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:54
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A uni-directional light emissive diode having improved linear response characteristics comprising: an active junction region for propagating light in a plane substantially parallel to said junction and in a plane substantially perpendicular to said junction; a mesa for containing said active region having a pair of top and bottom opposing surfaces and tapered sides connecting between said surfaces said tapered sides inclining toward said top surface for reflecting said parallel light in a direction perpendicular to said bottom surface and mixing said parallel light with said perpendicular light and causing said light to become uni-directional; and a cavity approximate said second surface for receiving one end of an optical fiber therein. whereby said uni-directional light is transmitted into said optical fiber.
Claim 2
Dependent Claim
121 words
A uni-directional light emissive diode having improved linear response characteristics comprising: an active junction region for propagating light in a plane substantially parallel to said junction and in a plane substantially perpendicular to said junction; a mesa for containing said active region having a pair of top and bottom opposing surfaces and tapered sides connecting between said surfaces said tapered sides inclining toward said top surface for reflecting said parallel light in a direction perpendicular to said bottom surface and mixing said parallel light with said perpendicular light and causing said light to become uni-directional; and a cavity approximate said second surface for receiving one end of an optical fiber therein. whereby said uni-directional light is transmitted into said optical fiber.
Claim 3
Dependent Claim
13 words
The diode of claim 1 wherein said diode comprises a double heterostructure configuration.
Claim 4
Dependent Claim
14 words
The diode of claim 1 wherein said active region comprises a layer of GaAs.
Claim 5
Dependent Claim
19 words
The diode of claim 3 wherein said GaAs layer is sandwiched between a first and second layer of GaAlAs.
Claim 6
Dependent Claim
116 words
A uni-directional light emissive diode comprising: a mesa having a pair of top and bottom opposing surfaces and tapered sides; a light producing junction within said mesa for propagating light in a plane perpendicular to said junction and in a plane parallel to said junction; an anti-reflection coating on said bottom surface for reducing light reflection therefrom said bottom surface; and a cavity proximate said bottom surface for receiving one end of an optical fiber therein; whereby said light propagated parallel to said junction becomes reflected by said tapered sides in a direction substantially perpendicular to said junction and mixes with said light propagated perpendicular to said junction and becomes directed into said optical fiber end.
Claim 7
Dependent Claim
116 words
A uni-directional light emissive diode comprising: a mesa having a pair of top and bottom opposing surfaces and tapered sides; a light producing junction within said mesa for propagating light in a plane perpendicular to said junction and in a plane parallel to said junction; an anti-reflection coating on said bottom surface for reducing light reflection therefrom said bottom surface; and a cavity proximate said bottom surface for receiving one end of an optical fiber therein; whereby said light propagated parallel to said junction becomes reflected by said tapered sides in a direction substantially perpendicular to said junction and mixes with said light propagated perpendicular to said junction and becomes directed into said optical fiber end.
Claim 8
Dependent Claim
33 words
The light emissive diode of claim 5 wherein the diode comprises a double heterostructure device wherein said active region consists of GaAs and wherein said active region is sandwiched between two GaAlAs layers.
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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) | 1980-10-10 | 1981-04-11 | 1981-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-10 | 1985-04-11 | 1985-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-10 | 1989-04-11 | 1989-10-11 | $7700.00 | Window Closed / Lapsed |