US5548438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bidirectional optical amplifier
Assignee: Nokia of America Corp
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Filing: 1993-12-23
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Granted: 1996-08-20
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Expires: 2013-12-23
Abstract
Abstract A bidirectional optical amplifier uses a four port optical circulator. Optical amplification is obtained in two fiber amplifiers which are connected to the optical circulator.
Inventors
- 👤 Jean-Marc P. Delavaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:24
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/29; H04B10/291; H04B10/297; H04B10/2971; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/06754; H01S3/06758; H01S3/06787
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
52 words
An optical amplifier comprising: a first optical circulator having first, second, third, and fourth ports; at least a first fiber amplifier optically connected to said second and third ports, respectively; means for pumping said at least first fiber amplifier; and a second fiber amplifier optically connected to said second and third ports.
Claim 2
Dependent Claim
52 words
An optical amplifier comprising: a first optical circulator having first, second, third, and fourth ports; at least a first fiber amplifier optically connected to said second and third ports, respectively; means for pumping said at least first fiber amplifier; and a second fiber amplifier optically connected to said second and third ports.
Claim 3
Dependent Claim
56 words
An optical amplifier as recited in claim 1 in which said means for pumping comprises a multiplexer having first, second, third, and fourth ports, said first and said second ports being optically connected to said first and said second fiber amplifiers, respectively; and first and second light sources connected to said third and fourth ports, respectively.
Claim 4
Dependent Claim
18 words
An optical amplifier as recited in claim 2 in which said first and second light sources comprise lasers.
Claim 5
Dependent Claim
27 words
An optical amplifier as recited in claim 2 further comprising an optical isolator connected to said second port of said multiplexer and to said second fiber amplifier.
Claim 6
Dependent Claim
51 words
An optical amplifier comprising: a first optical circulator having first, second, third, and fourth ports; at least a first fiber amplifier optically connected to said second and third ports, respectively; and means for pumping said at least first fiber amplifier; said means for pumping is local to said first optical circulator.
Claim 7
Dependent Claim
51 words
An optical amplifier comprising: a first optical circulator having first, second, third, and fourth ports; at least a first fiber amplifier optically connected to said second and third ports, respectively; and means for pumping said at least first fiber amplifier; said means for pumping is local to said first optical circulator.
Claim 8
Dependent Claim
86 words
An optical amplifier comprising: a first optical circulator having first, second, third and fourth ports; at least a first fiber amplifier optically connected to said second and third ports, respectively; means for pumping said at least first fiber amplifier; and a second optical circulator having first, second, third, fourth ports, said second circulator being optically connected to said first optical circulator; third at least a third fiber amplifier connected to said second and third ports, respectively; and means for pumping said at least third fiber amplifier.
Claim 9
Dependent Claim
86 words
An optical amplifier comprising: a first optical circulator having first, second, third and fourth ports; at least a first fiber amplifier optically connected to said second and third ports, respectively; means for pumping said at least first fiber amplifier; and a second optical circulator having first, second, third, fourth ports, said second circulator being optically connected to said first optical circulator; third at least a third fiber amplifier connected to said second and third ports, respectively; and means for pumping said at least third fiber amplifier.
Claim 10
Dependent Claim
24 words
An optical amplifier as recited in claim 6 further comprising a dispersion compensated fiber optically connected to said first and said second optical circulators.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-08-20 | 2000-02-19 | 2000-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-08-20 | 2004-02-19 | 2004-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-08-20 | 2008-02-19 | 2008-08-20 | $7700.00 | Window Closed / Lapsed |