US4959837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Doped optical fiber laser amplifier
Assignee: Alcatel Lucent SAS
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Filing: 1989-11-13
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Granted: 1990-09-25
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Expires: 2009-11-13
Abstract
Abstract An erbium-doped fiber laser amplifier (1), characterized by the fact that said fiber (3) is doped to a concentration lying in the range 5 ppm to 50 ppm, that the length of said fiber lies in the range 250 m to 30 m depending on the selected concentration of doping, and that the radial position of the doped zone substantially coincides with the energy maximum of the set of propagation modes in said fiber at the pumping wavelength.
Inventors
- 👤 Herve Fevrier
- 👤 Josiane Ramos
- 👤 Jacques Auge
- 👤 Jean-Francois Marcerou
- 👤 Bernard Jacquier
- 👤 Jean-Claude Gacon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:33
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/06708; H01S3/06729
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
76 words
An erbium-doped fiber laser amplifier, characterized by the fact that said fiber is doped to a concentration lying in the range 5 ppm to 50 ppm, that the length of said fiber lies in the range 250 m to 30 m depending on the selected concentration of doping, and that the radial position of the doped zone substantially coincides with the energy maximum of the set of propagation modes in said fiber at the pumping wavelength.
Claim 2
Dependent Claim
76 words
An erbium-doped fiber laser amplifier, characterized by the fact that said fiber is doped to a concentration lying in the range 5 ppm to 50 ppm, that the length of said fiber lies in the range 250 m to 30 m depending on the selected concentration of doping, and that the radial position of the doped zone substantially coincides with the energy maximum of the set of propagation modes in said fiber at the pumping wavelength.
Claim 3
Dependent Claim
50 words
An optical fiber laser amplifier according to claim 1, characterized by the fact that the radial position of the doped zone lies at a distance from the center of the fiber in the range 0.6 R to 0.85 R where R is the radius of the core of said fiber.
References Cited (Backward Citations)
US4637025A
Cited
WO1987001246A1
Cited
US4782494A
Cited
US4910737A
Cited
GB8701246D0
Cited
EP0313209A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |