US5042039A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Er-doped optical fiber laser device
Assignee: KDDI Submarine Cable Systems Inc
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Filing: 1989-12-19
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Granted: 1991-08-20
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Expires: 2009-12-19
Abstract
Abstract An Er-doped optical fiber laser device adapted for pumping by light from a pumping light source in an erbium (Er)-doped optical fiber which enters a single mode at the wavelength of amplified light. In accordance with the present invention, the Er-doped optical fiber is further doped with at least one of holmium (Ho), thulium (Tm) and dysprosium (Dy). The pumping light source emits light in a 1.1 to 1.4 μm band. The output light from the pumping light source and signal light incident to the Er-doped optical fiber are combined by a combining optical fiber coupler.
Inventors
- 👤 Noboru Edagawa
- 👤 Kiyofumi Mochizuki
- 👤 Hiroharu Wakabayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:12
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/06708
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
96 words
An Er-doped optical fiber laser device receptive of a signal light input for pumping by light from a pumping light source in an erbium (E)r-doped optical fiber which enters a single mode at the wavelength of amplified light, characterized in: that said Er-doped optical fiber is additionally doped with at least one of holmium (Ho), thulium (Tm) and dysprosium (Dy); that said pumping light source emits light in a 1.1 to 1.4 μm band; and combining means for combining the output light from said pumping light source and signal light input to said Er-doped optical fiber.
Claim 2
Dependent Claim
96 words
An Er-doped optical fiber laser device receptive of a signal light input for pumping by light from a pumping light source in an erbium (E)r-doped optical fiber which enters a single mode at the wavelength of amplified light, characterized in: that said Er-doped optical fiber is additionally doped with at least one of holmium (Ho), thulium (Tm) and dysprosium (Dy); that said pumping light source emits light in a 1.1 to 1.4 μm band; and combining means for combining the output light from said pumping light source and signal light input to said Er-doped optical fiber.
Claim 3
Dependent Claim
22 words
An Er-doped optical fiber laser device according to claim 1, characterized in that said pumping light source comprises an InGaAsP-series semiconductor laser.
Claim 4
Dependent Claim
28 words
An Er-doped optical fiber laser device according to claim 1, characterized by the provision of a single-mode optical fiber connecting said pumping light source to said combining means.
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) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |