US5140658A
Expired / Lapsed
US
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Optical amplifiers involving single crystal waveguides
Assignee: Nokia Bell Labs
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Filing: 1991-04-26
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Granted: 1992-08-18
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Expires: 2011-04-26
Abstract
Abstract Optical amplifiers that are useful, for example, in optical communications are formed using a single crystal host waveguide and a dopant such as a transition metal. Through this combination, the amplified wavelength is adjustable and amplification at 1.3 μm is possible.
Inventors
- 👤 Steven A. Sunshine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:54
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S2302/00; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1611; H01S3/1613; H01S3/162; H01S3/1623; H01S3/163; H01S3/1655; H01S3/1661
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
98 words
A device suitable for amplifying an optical signal at a desired wavelength, said device comprising means for introducing said signal, means for introducing optical power for said amplification, output means, and a region suitable for guiding said signal and said optical power characterized in that said region comprises 1) a single crystal core including a dopant and 2) adjacent cladding of lower refractive index than said core to provide said guiding, wherein said dopant is an atom in an oxidation state having an electronic structure that interacts with said single crystal material to provide amplification at said wavelength.
Claim 2
Independent Claim
98 words
A device suitable for amplifying an optical signal at a desired wavelength, said device comprising means for introducing said signal, means for introducing optical power for said amplification, output means, and a region suitable for guiding said signal and said optical power characterized in that said region comprises 1) a single crystal core including a dopant and 2) adjacent cladding of lower refractive index than said core to provide said guiding, wherein said dopant is an atom in an oxidation state having an electronic structure that interacts with said single crystal material to provide amplification at said wavelength.
Claim 3
Dependent Claim
10 words
The device of claim 1 wherein said atom comprises chromium.
Claim 4
Dependent Claim
16 words
The device of claim 2 wherein said single crystal material comprises Y 2 SiO 5 .
Claim 5
Dependent Claim
16 words
The device of claim 1 wherein said single crystal material comprises Y 2 SiO 5 .
Claim 6
Dependent Claim
11 words
The device of claim 1 wherein said region comprises a fiber.
Claim 7
Dependent Claim
12 words
The device of claim 1 wherein said atom comprises a transition metal.
Claim 8
Dependent Claim
23 words
The device of claim 1 wherein said means for inputing optical power comprises butt coupling between said guiding region and a silica fiber.
Claim 9
Dependent Claim
20 words
The device of claim 1 wherein said output means comprises butt coupling between said guiding region and a silica fiber.
References Cited (Backward Citations)
US4272733A
Cited
US4932031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |