US4605942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple wavelength light emitting devices
Assignee: Nokia Bell Labs
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Filing: 1984-10-09
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Granted: 1986-08-12
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Expires: 2004-10-09
Abstract
Abstract Presented is a dual wavelength structure wherein two edge-emitting devices are bonded with p-regions adjacent. The bonding medium is a conductive compound that forms a common electrode between the devices. Each device is separately addressable. Efficient coupling of emitted light into a single fiber is accomplished by restricting the vertical and horizontal separation of the light emitting stripes.
Inventors
- 👤 Irfan Camlibel
- 👤 Aland K. Chin
- 👤 Brymer H. Chin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:17
CPC Classifications
H; H10; H10H; H10H20/00; H10H20/80; H10H20/81; H10H20/813; G; G02; G02B; G02B6/00; G02B6/24; G02B6/42; G02B6/4201; G02B6/4219; G02B6/4228; G02B6/423; G02B6/4249; H10H29/00; H10H29/10; H10W; H10W90/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
66 words
A multiwavelength light emitting device comprising: two light emitting devices, each comprising a confined light emitting region which emits light at a different wavelength, said devices being bonded with a conductive material that forms a common electrode between them, the light emitting regions being sufficiently close together to couple light from both regions into a single optical fiber; and means for electrically addressing each device separately.
Claim 2
Dependent Claim
66 words
A multiwavelength light emitting device comprising: two light emitting devices, each comprising a confined light emitting region which emits light at a different wavelength, said devices being bonded with a conductive material that forms a common electrode between them, the light emitting regions being sufficiently close together to couple light from both regions into a single optical fiber; and means for electrically addressing each device separately.
Claim 3
Dependent Claim
21 words
The multiwavelength device according to claim 1 further comprising a heat sink between each light emitting device and the common electrode.
Claim 4
Dependent Claim
26 words
The multiwavelength device according to claim 1 wherein the vertical separation of the light emitting regions lies within the range of 5 μm to 100 μm.
Claim 5
Dependent Claim
22 words
The multiwavelength device according to claim 1 wherein the vertical separation of the light emitting regions is no greater than 25 μm.
Claim 6
Dependent Claim
34 words
The multiwavelength device according to claim 1 wherein the means for electrically addressing each light emitting device comprises ohmic contact layers formed on the surfaces of the light emitting devices opposite the bonded surfaces.
Claim 7
Dependent Claim
36 words
The multiwavelength device according to claim 1 wherein the length of one light emitting device is greater than the length of the other light emitting device, in order to permit electrical access to the common electrode.
Claim 8
Dependent Claim
24 words
The multiwavelength device according to claim 2 wherein the heat sink serves also as a shield against photo-excitation of one device by the other.
Claim 9
Dependent Claim
37 words
The multiwavelength device according to claim 1 wherein each device includes an n-type region and a p-type region, and the devices are bonded so that their p-type regions are in close proximity without any intervening n-type region.
Claim 10
Dependent Claim
31 words
The multiwavelength device according to claim 1 further comprising an optical fiber which is aligned with said light emitting regions so that light from both regions is coupled into said fiber.
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) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |