CA2055274A1 - Optical communication system with a fiber-optic amplifier - Google Patents
Optical communication system with a fiber-optic amplifierInfo
- Publication number
- CA2055274A1 CA2055274A1 CA2055274A CA2055274A CA2055274A1 CA 2055274 A1 CA2055274 A1 CA 2055274A1 CA 2055274 A CA2055274 A CA 2055274A CA 2055274 A CA2055274 A CA 2055274A CA 2055274 A1 CA2055274 A1 CA 2055274A1
- Authority
- CA
- Canada
- Prior art keywords
- fiber
- pump light
- signal
- communication system
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title abstract 7
- 238000004891 communication Methods 0.000 title abstract 4
- 230000006854 communication Effects 0.000 title abstract 4
- 239000000835 fiber Substances 0.000 abstract 4
- 230000003321 amplification Effects 0.000 abstract 1
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/2912—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form characterised by the medium used for amplification or processing
Abstract
In an optical communication system with a fiber-optic amplifier (10) which includes a wavelength-selective fiber-optic coupler (12) for coupling pump light into the amplifying length of fiber (11), according to the invention, an additional optical signal, e.g., a service-channel signal, is transmitted from the location of the fiber-optic amplifier (10) in one direction or the other by being used to modulate the pump light. Since the pump light is not completely absorbed in the amplifying length of fiber (11), a sufficient portion is transferred from the length of fiber (11) into the optical waveguide (15) of the optical communication system and passes down the optical waveguide to the end point (A) of the communica-tion system. There,it is coupled out and passed to an optical receiver (17) from whose output the transmitted additional signal is recovered by demodulation. To pre-vent the modulation of the pump light from modulating the amplification brought about by the amplifying length of fiber (11), the additional signal is modulated onto a carrier wave of sufficiently high frequency, and the re-sulting signal is used to modulate the pump light.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4036327A DE4036327A1 (en) | 1990-11-15 | 1990-11-15 | OPTICAL MESSAGE TRANSMISSION SYSTEM WITH A FIBER OPTICAL AMPLIFIER |
DEP4036327.9 | 1990-11-15 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2055274A1 true CA2055274A1 (en) | 1992-05-16 |
CA2055274C CA2055274C (en) | 1998-01-27 |
Family
ID=6418272
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002055274A Expired - Fee Related CA2055274C (en) | 1990-11-15 | 1991-11-13 | Optical communication system with a fiber-optic amplifier |
Country Status (8)
Country | Link |
---|---|
US (1) | US5285306A (en) |
EP (1) | EP0485813B1 (en) |
JP (1) | JPH04273624A (en) |
AT (1) | ATE139877T1 (en) |
AU (1) | AU647200B2 (en) |
CA (1) | CA2055274C (en) |
DE (1) | DE4036327A1 (en) |
ES (1) | ES2091272T3 (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3137632B2 (en) * | 1989-08-31 | 2001-02-26 | 富士通株式会社 | Optical communication system with optical fiber amplifier |
JP3425964B2 (en) * | 1992-03-19 | 2003-07-14 | 富士通株式会社 | Optical signal generator and optical transmission system using stimulated Brillouin scattering |
IL106766A (en) * | 1992-08-28 | 1995-12-31 | Hughes Aircraft Co | Bi-directional optical fiber amplifier for missile guidance data link repeater |
DE4310292A1 (en) * | 1993-03-30 | 1994-10-06 | Sel Alcatel Ag | Fiber optic amplifier with a device for monitoring the input power |
DE4324984A1 (en) * | 1993-07-26 | 1995-02-02 | Sel Alcatel Ag | Fiber optic amplifier as a wavelength converter |
US5481391A (en) * | 1994-02-17 | 1996-01-02 | At&T Corp. | Optical fiber system and method for overcoming the effects of polarization gain anisotropy in a fiber amplifier |
FR2721158B1 (en) * | 1994-06-14 | 1996-07-12 | Alcatel Submarcom | Transmission system on a fiber optic line without repeater, with remote and local amplifications. |
US5532864A (en) * | 1995-06-01 | 1996-07-02 | Ciena Corporation | Optical monitoring channel for wavelength division multiplexed optical communication system |
US5847853A (en) | 1995-12-29 | 1998-12-08 | Micron Technology, Inc. | Modulation and demodulation of light to facilitate transmission of information |
DE69839961D1 (en) | 1997-02-25 | 2008-10-16 | Hitachi Ltd | OPTICAL CROSS-LINKING DEVICE |
JP4647147B2 (en) * | 2001-07-16 | 2011-03-09 | 富士通株式会社 | Optical transmission method and optical transmission system using Raman amplification |
US6731428B2 (en) * | 2001-11-21 | 2004-05-04 | Lucent Technologies Inc. | Pump monitoring and control in a fiber Raman amplifier |
DE102004037549A1 (en) * | 2004-08-03 | 2006-03-16 | Deutsche Telekom Ag | Device for generating and modulating a high-frequency signal |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6175326A (en) * | 1984-09-21 | 1986-04-17 | Nec Corp | In-fiber optical amplifying and transmitting device |
DE3827228A1 (en) * | 1988-08-11 | 1990-02-15 | Standard Elektrik Lorenz Ag | TRANSMITTER / RECEIVER FOR A BIDIRECTIONAL COHERENT-OPTICAL TRANSMISSION SYSTEM |
JP3137632B2 (en) * | 1989-08-31 | 2001-02-26 | 富士通株式会社 | Optical communication system with optical fiber amplifier |
IT1238032B (en) * | 1990-01-30 | 1993-06-23 | Pirelli Cavi Spa | FIBER OPTIC TELECOMMUNICATION LINE WITH SEPARATE SERVICE CHANNELS |
US5153762A (en) * | 1990-03-19 | 1992-10-06 | General Instrument Corporation | Method and apparatus for recovering AM channell signals distributed on an optical fiber |
US5229876A (en) * | 1990-03-26 | 1993-07-20 | At&T Bell Laboratories | Telemetry for optical fiber amplifier repeater |
US5035481A (en) * | 1990-08-23 | 1991-07-30 | At&T Bell Laboratories | Long distance soliton lightwave communication system |
US5140656A (en) * | 1991-08-12 | 1992-08-18 | At&T Bell Laboratories | Soliton optical fiber communication system |
-
1990
- 1990-11-15 DE DE4036327A patent/DE4036327A1/en not_active Withdrawn
-
1991
- 1991-10-31 AT AT91118606T patent/ATE139877T1/en not_active IP Right Cessation
- 1991-10-31 ES ES91118606T patent/ES2091272T3/en not_active Expired - Lifetime
- 1991-10-31 EP EP91118606A patent/EP0485813B1/en not_active Expired - Lifetime
- 1991-11-06 AU AU87068/91A patent/AU647200B2/en not_active Ceased
- 1991-11-13 JP JP3297199A patent/JPH04273624A/en active Pending
- 1991-11-13 CA CA002055274A patent/CA2055274C/en not_active Expired - Fee Related
- 1991-11-14 US US07/791,370 patent/US5285306A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
ATE139877T1 (en) | 1996-07-15 |
DE4036327A1 (en) | 1992-05-21 |
US5285306A (en) | 1994-02-08 |
EP0485813A3 (en) | 1992-09-23 |
EP0485813B1 (en) | 1996-06-26 |
ES2091272T3 (en) | 1996-11-01 |
EP0485813A2 (en) | 1992-05-20 |
CA2055274C (en) | 1998-01-27 |
JPH04273624A (en) | 1992-09-29 |
AU8706891A (en) | 1992-05-21 |
AU647200B2 (en) | 1994-03-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKLA | Lapsed |