US5561683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circular grating surface emitting laser diode
Assignee: Pohang University of Science and Technology Foundation
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Filing: 1995-01-27
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Granted: 1996-10-01
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Expires: 2015-01-27
Abstract
Abstract A surface emitting laser diode comprises a circular grating defined on the top surface of the diode for emitting a laser therethrough, an active layer for generating the laser in the region thereof under the circular grating, a reflection layer for preventing the laser from emitting through the bottom surface of the diode and a first contact, which includes a plurality of electrodes, for providing the active layer with carriers of a first conduction type and a second contact for providing the active layer with carriers of a second conduction type.
Inventors
- 👤 O'Dae Kwon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:54
CPC Classifications
H; H01; H01S; H01S5/00; H01S5/10; H01S5/18; H01S5/183; H01S5/18386; H01S3/00; H01S3/09; H01S3/091; H01S3/094; H01S3/0941; H01S5/02; H01S5/022; H01S5/02208; H01S5/02212; H01S5/0225; H01S5/02251; H01S5/18391; H01S5/04; H01S5/042; H01S5/0425; H01S5/04256; H01S5/06; H01S5/062; H01S5/06233; H01S5/06243; H01S5/11; H01S5/40; H01S5/4025; H01S5/4075; H01S5/42; H01S5/423
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
135 words
A surface emitting laser diode having a top and a bottom surfaces comprising: a non-equally-spaced eccentric circular grating defined on a portion of the top surface for emitting a laser therethrough; an active layer for generating the laser in a region thereof under the non-equally-spaced eccentric circular grating; a reflection layer for preventing the laser from emitting through the bottom surface of the laser diode, the reflection layer being positioned intermediate the bottom surface and the active layer; a first contact for providing the active layer with carriers of a first conduction type, the first contact having a plurality of electrodes, each of which is controlled independently and disposed outside the non-equally-spaced eccentric circular grating on the top surface; and a second contact for providing carriers of a second conduction type to the active layer.
Claim 2
Dependent Claim
135 words
A surface emitting laser diode having a top and a bottom surfaces comprising: a non-equally-spaced eccentric circular grating defined on a portion of the top surface for emitting a laser therethrough; an active layer for generating the laser in a region thereof under the non-equally-spaced eccentric circular grating; a reflection layer for preventing the laser from emitting through the bottom surface of the laser diode, the reflection layer being positioned intermediate the bottom surface and the active layer; a first contact for providing the active layer with carriers of a first conduction type, the first contact having a plurality of electrodes, each of which is controlled independently and disposed outside the non-equally-spaced eccentric circular grating on the top surface; and a second contact for providing carriers of a second conduction type to the active layer.
Claim 3
Dependent Claim
14 words
An array of laser diodes including the surface emitting laser diode of claim 1.
Claim 4
Dependent Claim
135 words
A surface emitting laser diode having a top and a bottom surfaces comprising: a non-equally-spaced eccentric elliptical grating defined on a portion of the top surface for emitting a laser therethrough; an active layer for generating the laser in a region thereof under the non-equally-spaced eccentric elliptical grating; a reflection layer for preventing the laser from emitting through the bottom surface of the laser diode, the reflection layer being positioned intermediate the bottom surface and the active layer; a first contact for providing the active layer with carriers of a first conduction type, the first contact having a plurality of electrodes, each of which is controlled independently and disposed outside the non-equally-spaced eccentric elliptical grating on the top surface; and a second contact for providing carriers of a second conduction type to the active layer.
Claim 5
Dependent Claim
135 words
A surface emitting laser diode having a top and a bottom surfaces comprising: a non-equally-spaced eccentric elliptical grating defined on a portion of the top surface for emitting a laser therethrough; an active layer for generating the laser in a region thereof under the non-equally-spaced eccentric elliptical grating; a reflection layer for preventing the laser from emitting through the bottom surface of the laser diode, the reflection layer being positioned intermediate the bottom surface and the active layer; a first contact for providing the active layer with carriers of a first conduction type, the first contact having a plurality of electrodes, each of which is controlled independently and disposed outside the non-equally-spaced eccentric elliptical grating on the top surface; and a second contact for providing carriers of a second conduction type to the active layer.
Claim 6
Dependent Claim
14 words
An array of laser diodes including the surface emitting laser diode of claim 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) | 1999-10-01 | 2000-04-01 | 2000-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-01 | 2004-04-01 | 2004-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-01 | 2008-04-01 | 2008-10-01 | $7700.00 | Window Closed / Lapsed |