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Patent US6456637B1 successfully refreshed from Google Patents.
US6456637B1
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US
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Waveguide lasers and optical amplifiers having enhanced thermal stability
Assignee: CACI LGS Innovations LLC
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Filing: 2000-05-30
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Granted: 2002-09-24
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Expires: 2020-05-30
Abstract
Abstract In accordance with the invention, a waveguide laser or amplifier having a peak absorption wavelength is provided with pump emitters having wavelengths deliberately offset from the peak absorption wavelength. The offset wavelengths of the emitters are chosen to enhance the thermal stability of the laser or amplifier. In one exemplary embodiment, the laser or amplifier is pumped by a bimodal distribution of emitters.
Inventors
- 👤 Douglas P. Holcomb
- 👤 Jane Deborah LeGrange
- 👤 Gerald E. Tourgee
- 👤 Eva Milar Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:02
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/0675; H01S3/06754
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
144 words
An optical waveguide laser or amplifier comprising: a length of rare earth doped optical waveguide having a peak absorption wavelength a first plurality of semiconductor pump emitters having light output wavelengths offset from the peak absorption wavelength by 0.5-1.0% to the short wavelength side of the absorption peak; a second plurality of semiconductor pump emitters having light output wavelengths offset from the peak absorption wavelength by 0.5-1.0% to the long wavelength side of the absorption peak; and, the first plurality of semiconductor pump emitters and the second plurality of semiconductor pump emitters are spaced in wavelength about the waveguide peak absorption wavelength such that when the contribution of the light from one plurality of semiconductor pump emitters changes with temperature, the contribution of the light from the other plurality of semiconductor pump emitters changes in a complementary way for stabilizing light output with temperature.
Claim 2
Dependent Claim
144 words
An optical waveguide laser or amplifier comprising: a length of rare earth doped optical waveguide having a peak absorption wavelength a first plurality of semiconductor pump emitters having light output wavelengths offset from the peak absorption wavelength by 0.5-1.0% to the short wavelength side of the absorption peak; a second plurality of semiconductor pump emitters having light output wavelengths offset from the peak absorption wavelength by 0.5-1.0% to the long wavelength side of the absorption peak; and, the first plurality of semiconductor pump emitters and the second plurality of semiconductor pump emitters are spaced in wavelength about the waveguide peak absorption wavelength such that when the contribution of the light from one plurality of semiconductor pump emitters changes with temperature, the contribution of the light from the other plurality of semiconductor pump emitters changes in a complementary way for stabilizing light output with temperature.
Claim 3
Dependent Claim
23 words
An optical waveguide laser or amplifier according to claim 1 wherein the first plurality of pump emitters provides 50-80% of the pump power.
Claim 4
Dependent Claim
18 words
An optical waveguide laser or amplifier according to claim 1 wherein the optical waveguide is doped with erbium.
Claim 5
Dependent Claim
18 words
An optical waveguide laser or amplifier according to claim 1 wherein the optical waveguide is doped with ytterbium.
Claim 6
Dependent Claim
20 words
An optical waveguide laser or amplifier according to claim 1 wherein the optical waveguide is co-doped with erbium and ytterbium.
References Cited (Backward Citations)
US5500764A
Cited
US6226308B1
Cited
JPH09186383A
Cited
EP0893862A2
Cited
US6157663A
Cited
US6185235B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-09-23 | 2006-03-25 | 2006-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-09-23 | 2010-03-25 | 2010-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-09-23 | 2014-03-25 | 2014-09-24 | $7700.00 | Window Closed / Lapsed |