Patent JPH0244061A successfully refreshed from Google Patents.
Patent US5392153A successfully refreshed from Google Patents.
US5392153A
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US
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Optical amplifier
Assignee: AT&T Inc
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Filing: 1993-08-31
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Granted: 1995-02-21
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Expires: 2013-08-31
Abstract
Abstract An amplifier is described which has a two stage arrangement in which the second stage is pumped with the pump signal not used in the first stage.
Inventors
- 👤 Jean-Marc P. Delavaux
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:38
CPC Classifications
H; H01; H01S; H01S3/00; H01S3/05; H01S3/06; H01S3/063; H01S3/067; H01S3/06754; H01S3/06758; H01S3/0675; H01S3/08; H01S3/08086; H01S3/0809; H01S3/09; H01S3/091; H01S3/094; H01S3/094003; H01S3/094015; H01S3/0941
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
93 words
An optical amplifier comprising; a pump laser producing a pump signal; a first multiplexer, said first multiplexer being adapted to combine said pump signal and information signals; a first fiber amplifier for amplifying signals from said first multiplexer; a second multiplexer, said multiplexer for demultiplexing and multiplexing said pump signal and said information signals; a second fiber amplifier, said amplifier receiving said pump signal from said second multiplexer; and means for taking said input signal from said second multiplexer and inserting said signal into said second multiplexer, said means comprises an interstage isolator.
Claim 2
Dependent Claim
93 words
An optical amplifier comprising; a pump laser producing a pump signal; a first multiplexer, said first multiplexer being adapted to combine said pump signal and information signals; a first fiber amplifier for amplifying signals from said first multiplexer; a second multiplexer, said multiplexer for demultiplexing and multiplexing said pump signal and said information signals; a second fiber amplifier, said amplifier receiving said pump signal from said second multiplexer; and means for taking said input signal from said second multiplexer and inserting said signal into said second multiplexer, said means comprises an interstage isolator.
Claim 3
Dependent Claim
17 words
An optical amplifier as recited in claim 1 in which said interstage isolator comprises a filter means.
Claim 4
Dependent Claim
17 words
An optical amplifier as recited in claim 2 in which said isolation element comprises an optical isolator.
Claim 5
Dependent Claim
17 words
An optical amplifier as recited in claim 2 in which said interstage isolator comprises a wavelength filter.
Claim 6
Dependent Claim
17 words
An optical amplifier as recited in claim 4 in which said wavelength filter comprises an add-drop filter.
Claim 7
Dependent Claim
19 words
An optical amplifier as recited in claim 1 in which said means for taking comprises an optical fiber loop.
Claim 8
Dependent Claim
33 words
An optical amplifier as recited in claim 6 in which said optical fiber loop is connected to said second multiplexer so that the signal from said multiplexer is looped through said second multiplexer.
Claim 9
Dependent Claim
29 words
An optical amplifier as recited in claim 6 in which said fiber loop is connected to said second multiplexer and the output signal is taken from said second multiplexer.
Claim 10
Dependent Claim
77 words
An optical amplifier comprising; a fiber grating laser, said laser capable of transmitting a pump signal and an information signal; a first fiber amplifier connected to said fiber grating laser; a multiplexer, said multiplexer demultiplexing said pump signal and said information signals; a second fiber amplifier, said amplifier receiving said pump signal from said multiplexer; and means for taking said signal from said multiplexer and inserting said signal into said multiplexer, said means comprising as interstage isolator.
Claim 11
Dependent Claim
77 words
An optical amplifier comprising; a fiber grating laser, said laser capable of transmitting a pump signal and an information signal; a first fiber amplifier connected to said fiber grating laser; a multiplexer, said multiplexer demultiplexing said pump signal and said information signals; a second fiber amplifier, said amplifier receiving said pump signal from said multiplexer; and means for taking said signal from said multiplexer and inserting said signal into said multiplexer, said means comprising as interstage isolator.
Claim 12
Dependent Claim
19 words
An optical amplifier as recited in claim 9 in which said means for taking comprises an optical fiber loop.
Claim 13
Dependent Claim
32 words
An optical amplifier as recited in claim 10 in which said fiber loop is connected to said second multiplexer so that the signal from said multiplexer is looped through said second multiplexer.
Claim 14
Dependent Claim
29 words
An optical amplifier as recited in claim 11 in which said fiber loop is connected to said second multiplexer and the output signal is taken from said second multiplexer.
Claim 15
Dependent Claim
75 words
An optical amplifier comprising; means for generating pump signal and information signal wavelengths; a first fiber amplifier for amplifying signals from said means; a multiplexer, said multiplexer for demultiplexing and multiplexing said pump signal and said information signals; a second fiber amplifier, said amplifier receiving said pump signal from said multiplexer; and a fiber loop connected to at least one of said second fiber amplifier and said multiplexer, said fiber loop being an interstage isolator.
Claim 16
Dependent Claim
75 words
An optical amplifier comprising; means for generating pump signal and information signal wavelengths; a first fiber amplifier for amplifying signals from said means; a multiplexer, said multiplexer for demultiplexing and multiplexing said pump signal and said information signals; a second fiber amplifier, said amplifier receiving said pump signal from said multiplexer; and a fiber loop connected to at least one of said second fiber amplifier and said multiplexer, said fiber loop being an interstage isolator.
Claim 17
Dependent Claim
33 words
An amplifier as recited in claim 13 in which said means for generating comprises; a pump laser; a multiplexer, said multiplexer being adapted to combine signals from said pump laser and input signals.
Claim 18
Dependent Claim
15 words
An amplifier as recited in claim 14 in which said fiber loop is wavelength equalized.
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) | 1998-02-20 | 1998-08-22 | 1999-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-02-20 | 2002-08-22 | 2003-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-02-20 | 2006-08-22 | 2007-02-21 | $7700.00 | Window Closed / Lapsed |