US5883736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Er-doped optical fiber amplifier
Assignee: Oplink Technology Inc
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Filing: 1997-02-21
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Granted: 1999-03-16
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Expires: 2017-02-21
Abstract
Abstract An Er-doped optical fiber amplifier is adapted to increase the length of transmission path by raising the intensity of pumped light. In an Er-doped optical fiber amplifier 1 for amplifying signal light by means of an Er-doped optical fiber 7, using a 1,530 nm band pumping source 8, 1,530 nm band pumped light is Raman-amplified by a 1,430 nm-1,450 nm band light source 9 on the transmission path of an optical fiber 5.
Inventors
- 👤 Isamu Oshima
- 👤 Akira Fujisaki
- 👤 Haruki Ogoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:10
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/29; H04B10/291; H04B10/2912; H04B10/2916; H01; H01S; H01S3/00; H01S3/09; H01S3/091; H01S3/094; H01S3/094003; H01S2303/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/06754; H01S3/14; H01S3/16; H01S3/1601; H01S3/1603; H01S3/1608; H01S3/30; H01S3/302
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
51 words
An Er-doped optical fiber amplifier for amplifying signal light by means of an Er-doped optical fiber, using a 1,530 nm band pumping source, characterized in that 1,530 nm band light pumped from the pumping source is Raman-amplified by a 1,430-1,450 nm band light source on the transmission path of optical fiber.
Claim 2
Dependent Claim
51 words
An Er-doped optical fiber amplifier for amplifying signal light by means of an Er-doped optical fiber, using a 1,530 nm band pumping source, characterized in that 1,530 nm band light pumped from the pumping source is Raman-amplified by a 1,430-1,450 nm band light source on the transmission path of optical fiber.
Claim 3
Dependent Claim
33 words
An optical amplifier according to claim 1, characterized in that 1,530 nm band light is Raman-amplified, by the 1,430 nm-1,450 nm band light source on the transmission path of dispersion shifted optical fiber.
Claim 4
Dependent Claim
21 words
An optical amplifier according to claim 1, characterized in that signal light has a wavelength of a 1,550 nm-1,570 nm band.
Claim 5
Dependent Claim
31 words
An optical amplifier according to claim 1, characterized in that signal light is Raman-amplified by a 1,460 nm-1,480 nm band light source on the transmission path of dispersion shifted optical fiber.
References Cited (Backward Citations)
US5323404A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-15 | 2002-09-14 | 2003-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-15 | 2006-09-14 | 2007-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-15 | 2010-09-14 | 2011-03-16 | $7700.00 | Window Closed / Lapsed |