CA2154641A1 - Amplified telecommunication system for wavelength-division multiplexing transmissions, having an equalized reception power - Google Patents
Amplified telecommunication system for wavelength-division multiplexing transmissions, having an equalized reception powerInfo
- Publication number
- CA2154641A1 CA2154641A1 CA002154641A CA2154641A CA2154641A1 CA 2154641 A1 CA2154641 A1 CA 2154641A1 CA 002154641 A CA002154641 A CA 002154641A CA 2154641 A CA2154641 A CA 2154641A CA 2154641 A1 CA2154641 A1 CA 2154641A1
- Authority
- CA
- Canada
- Prior art keywords
- optical
- signals
- telecommunication system
- fibre
- wavelength
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
-
- 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
- H04B10/293—Signal power control
- H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
-
- 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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0221—Power control, e.g. to keep the total optical power constant
Abstract
An optical telecommunication system comprising a transmitting station and a receiving station for optical signals, connected with each other by an optical fibre line including optical line amplifiers having a rare-earth-doped active fibre and connected in series, in which the transmitting station comprises generation means for generating signals at several predetermined wavelengths, and conveyor means for conveying said signals to a single optical fibre line, and said optical signal receiving station comprises separation means for separating said signals, in which at least one of said optical line amplifier has dopants, fibre length and pumping power capable of determining, at the input of the receiving station, an optical signal/noise ratio which between the different wavelengths has a difference lower than 2 dB, and for each signal is greater than 15 dB.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI941573A IT1273676B (en) | 1994-07-25 | 1994-07-25 | MULTIPLATION AMPLIFIED TELECOMMUNICATION SYSTEM WITH WAVELENGTH DIVISION, WITH EQUALIZED RECEPTION POWER |
ITMI94A001573 | 1994-07-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2154641A1 true CA2154641A1 (en) | 1996-01-26 |
CA2154641C CA2154641C (en) | 2005-03-15 |
Family
ID=11369353
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002154641A Expired - Lifetime CA2154641C (en) | 1994-07-25 | 1995-07-25 | Amplified telecommunication system for wavelength-division multiplexing transmissions, having an equalized reception power |
Country Status (21)
Country | Link |
---|---|
US (2) | US5852510A (en) |
EP (1) | EP0695049B1 (en) |
JP (1) | JPH08195721A (en) |
KR (1) | KR960006371A (en) |
CN (1) | CN1117679A (en) |
AT (1) | ATE255302T1 (en) |
AU (1) | AU710198B2 (en) |
BR (1) | BR9502403A (en) |
CA (1) | CA2154641C (en) |
CZ (1) | CZ192295A3 (en) |
DE (1) | DE69532178T2 (en) |
FI (1) | FI953544A (en) |
HU (1) | HU218631B (en) |
IT (1) | IT1273676B (en) |
NO (1) | NO952929L (en) |
NZ (1) | NZ272564A (en) |
PE (1) | PE16097A1 (en) |
PL (1) | PL178061B1 (en) |
RU (1) | RU2159509C2 (en) |
SK (1) | SK93895A3 (en) |
TW (1) | TW270265B (en) |
Families Citing this family (40)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09116492A (en) * | 1995-10-18 | 1997-05-02 | Nec Corp | Wavelength multiplex light amplifying/repeating method/ device |
JPH10164020A (en) * | 1996-11-29 | 1998-06-19 | Nec Corp | Light wavelength multiplex relay transmission system and light s/n equalization method therefor |
US6052393A (en) | 1996-12-23 | 2000-04-18 | The Regents Of The University Of Michigan | Broadband Sagnac Raman amplifiers and cascade lasers |
US6914717B1 (en) | 1996-12-23 | 2005-07-05 | Xtera Communications, Inc. | Multiple wavelength pumping of raman amplifier stages |
JPH10276172A (en) * | 1997-03-28 | 1998-10-13 | Kokusai Denshin Denwa Co Ltd <Kdd> | Wavelength division optical processor and optical communication transmission line using the same |
DE69725840T2 (en) * | 1997-06-06 | 2004-07-22 | Avanex Corp., Fremont | Fiber optic telecommunication system |
AU8802498A (en) | 1997-08-01 | 1999-02-22 | Pirelli Cavi E Sistemi S.P.A. | Multi-band amplification system for dense wavelength division multiplexing |
JPH11112068A (en) * | 1997-10-06 | 1999-04-23 | Fujitsu Ltd | Method and system for transmitting optical signal |
JP3638777B2 (en) | 1998-02-04 | 2005-04-13 | 富士通株式会社 | Method for gain equalization and apparatus and system used to implement the method |
US6597493B2 (en) | 2000-05-05 | 2003-07-22 | The Regents Of The University Of Michigan | Nonlinear fiber amplifiers used for a 1430-1530nm low-loss window in optical fibers |
US6574037B2 (en) | 1998-06-16 | 2003-06-03 | Xtera Communications, Inc. | All band amplifier |
US6321016B1 (en) * | 1998-06-19 | 2001-11-20 | Pirelli Cavi E Sistemi S.P.A. | Optical fiber having low non-linearity for WDM transmission |
US6545799B1 (en) * | 1998-09-02 | 2003-04-08 | Corning Incorporated | Method and apparatus for optical system link control |
US6606178B1 (en) | 1999-09-23 | 2003-08-12 | Corning Incorporated | Method and system to reduce FWM penalty in NRZ WDM systems |
US6421167B1 (en) | 2000-03-03 | 2002-07-16 | General Dynamics Advanced Technology Systems, Inc. | Multiple function bandwidth management systems |
US6381063B1 (en) * | 2000-03-16 | 2002-04-30 | Corning Incorporated | Long band optical amplifier |
US6961522B1 (en) | 2000-11-22 | 2005-11-01 | Cisco Technology, Inc. | Automatic raman gain and tilt control for ultra-long-distance dense WDM optical communication system |
US6437906B1 (en) | 2000-11-22 | 2002-08-20 | Cisco Technology, Inc. | All-optical gain controlled L-band EDFA structure with reduced four-wave mixing cross-talk |
US6532101B2 (en) | 2001-03-16 | 2003-03-11 | Xtera Communications, Inc. | System and method for wide band Raman amplification |
US6810214B2 (en) | 2001-03-16 | 2004-10-26 | Xtera Communications, Inc. | Method and system for reducing degradation of optical signal to noise ratio |
US6941079B1 (en) | 2001-05-24 | 2005-09-06 | Cisco Technology, Inc. | Optical demultiplexer with multi-channel power control and tilt compensation |
US6697193B1 (en) | 2001-06-06 | 2004-02-24 | Cisco Technology, Inc. | Shared variable gain amplifier for WDM channel equalization |
US6587259B2 (en) | 2001-07-27 | 2003-07-01 | Xtera Communications, Inc. | System and method for controlling noise figure |
US6757099B2 (en) | 2001-08-15 | 2004-06-29 | Pts Corporation | Optical power transient control scheme for EDFA amplifiers |
US6594071B1 (en) | 2001-10-02 | 2003-07-15 | Xtera Communications, Inc. | Method and apparatus for amplifier control |
US20030067670A1 (en) * | 2001-10-04 | 2003-04-10 | Lacra Pavel | Dynamic optical spectral control scheme for optical amplifier sites |
CN1330119C (en) * | 2001-11-11 | 2007-08-01 | 华为技术有限公司 | Light signal regulating method and light transmission system for high-speed transmission system |
US6621626B1 (en) | 2001-12-05 | 2003-09-16 | Cisco Technology, Inc. | Modular optical amplifier structure for highly dense interleaved WDM systems |
US6819479B1 (en) | 2001-12-20 | 2004-11-16 | Xtera Communications, Inc. | Optical amplification using launched signal powers selected as a function of a noise figure |
US7233432B2 (en) * | 2001-12-20 | 2007-06-19 | Xtera Communications, Inc. | Pre-emphasized optical communication |
US6819478B1 (en) | 2002-03-15 | 2004-11-16 | Xtera Communications, Inc. | Fiber optic transmission system with low cost transmitter compensation |
US7197245B1 (en) | 2002-03-15 | 2007-03-27 | Xtera Communications, Inc. | System and method for managing system margin |
US6778321B1 (en) | 2002-03-15 | 2004-08-17 | Xtera Communications, Inc. | Fiber optic transmission system for a metropolitan area network |
US6825973B1 (en) | 2002-03-15 | 2004-11-30 | Xtera Communications, Inc. | Reducing leading edge transients using co-propagating pumps |
KR100458678B1 (en) * | 2002-03-20 | 2004-12-03 | 주식회사 럭스퍼트 | Gain-providing optical power equalizer |
US7054059B1 (en) | 2003-05-14 | 2006-05-30 | Cisco Technoloy, Inc. | Lumped Raman amplification structure for very wideband applications |
EP2475121A1 (en) * | 2011-01-10 | 2012-07-11 | Ntt Docomo, Inc. | Communication system and method for directly transmitting signals between nodes of a communication system |
CN104683036B (en) * | 2015-03-23 | 2017-07-28 | 东南大学 | A kind of many source laser binary phase modulation and demodulation device and methods |
EP3379745B1 (en) * | 2015-12-11 | 2020-03-25 | Huawei Technologies Co., Ltd. | Method and device for controlling transmitted power of optical network unit, and optical network unit |
US20220416897A1 (en) * | 2019-06-21 | 2022-12-29 | Nippon Telegraph And Telephone Corporation | Optical amplifier, receiver, optical transmission system, and optical amplifier design method |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5282079A (en) | 1988-06-10 | 1994-01-25 | Pirelli General Plc | Optical fibre amplifier |
US5087108A (en) | 1989-08-11 | 1992-02-11 | Societa' Cavi Pirelli S.P.A. | Double-core active-fiber optical amplifier having a wide-band signal wavelength |
IT1237136B (en) | 1989-10-30 | 1993-05-24 | Pirelli Cavi Spa | WIDE BANDWIDE SIGNAL WAVE LENGTH OPTICAL AMPLIFIER. |
US5267073A (en) | 1989-10-30 | 1993-11-30 | Pirelli Cavi S.P.A. | Amplifier adapter for optical lines |
DE4002369A1 (en) | 1990-01-27 | 1991-08-01 | Standard Elektrik Lorenz Ag | Multistage fibre=optic amplifier - provides constant amplification over large range of wavelengths using selective directional coupler and pump light source |
IT1237970B (en) | 1990-02-07 | 1993-06-19 | Pirelli Cavi Spa | ACTIVE FIBER OPTICAL AMPLIFIER, WITH DOUBLE CORE PORTIONS, WIDE SIGNAL WAVE LENGTH BAND |
US5117303A (en) | 1990-08-23 | 1992-05-26 | At&T Bell Laboratories | Method of operating concatenated optical amplifiers |
US5088095A (en) | 1991-01-31 | 1992-02-11 | At&T Bell Laboratories | Gain stabilized fiber amplifier |
US5225922A (en) * | 1991-11-21 | 1993-07-06 | At&T Bell Laboratories | Optical transmission system equalizer |
US5239607A (en) * | 1992-06-23 | 1993-08-24 | Bell Communications Research, Inc. | Optical fiber amplifier with flattened gain |
US5280383A (en) | 1992-12-02 | 1994-01-18 | At&T Bell Laboratories | Dual-stage low power optical amplifier |
JP3286972B2 (en) * | 1992-12-25 | 2002-05-27 | キヤノン株式会社 | Wavelength demultiplexer and wavelength division multiplexing communication system using the same |
US5406404A (en) * | 1993-11-02 | 1995-04-11 | At&T Corp. | Method of mitigating gain peaking using a chain of fiber amplifiers |
US5504609A (en) * | 1995-05-11 | 1996-04-02 | Ciena Corporation | WDM optical communication system with remodulators |
US5715076A (en) * | 1995-05-11 | 1998-02-03 | Ciena Corporation | Remodulating channel selectors for WDM optical communication systems |
US5726784A (en) * | 1995-05-11 | 1998-03-10 | Ciena Corp. | WDM optical communication system with remodulators and diverse optical transmitters |
-
1994
- 1994-07-25 IT ITMI941573A patent/IT1273676B/en active IP Right Grant
-
1995
- 1995-07-13 NZ NZ272564A patent/NZ272564A/en not_active IP Right Cessation
- 1995-07-21 EP EP95111501A patent/EP0695049B1/en not_active Expired - Lifetime
- 1995-07-21 AT AT95111501T patent/ATE255302T1/en not_active IP Right Cessation
- 1995-07-21 DE DE69532178T patent/DE69532178T2/en not_active Expired - Lifetime
- 1995-07-24 CN CN95108635A patent/CN1117679A/en active Pending
- 1995-07-24 RU RU95113209/09A patent/RU2159509C2/en active
- 1995-07-24 US US08/506,086 patent/US5852510A/en not_active Expired - Lifetime
- 1995-07-24 PE PE1995274552A patent/PE16097A1/en not_active Application Discontinuation
- 1995-07-24 HU HU9502215A patent/HU218631B/en not_active IP Right Cessation
- 1995-07-24 NO NO952929A patent/NO952929L/en not_active Application Discontinuation
- 1995-07-24 TW TW084107656A patent/TW270265B/zh active
- 1995-07-24 FI FI953544A patent/FI953544A/en unknown
- 1995-07-25 CZ CZ951922A patent/CZ192295A3/en unknown
- 1995-07-25 SK SK938-95A patent/SK93895A3/en unknown
- 1995-07-25 AU AU27184/95A patent/AU710198B2/en not_active Expired
- 1995-07-25 PL PL95309766A patent/PL178061B1/en unknown
- 1995-07-25 KR KR1019950022091A patent/KR960006371A/en not_active Application Discontinuation
- 1995-07-25 JP JP7189468A patent/JPH08195721A/en active Pending
- 1995-07-25 BR BR9502403A patent/BR9502403A/en unknown
- 1995-07-25 CA CA002154641A patent/CA2154641C/en not_active Expired - Lifetime
-
1998
- 1998-11-09 US US09/188,466 patent/US6025954A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
BR9502403A (en) | 1996-06-25 |
DE69532178T2 (en) | 2004-08-12 |
FI953544A0 (en) | 1995-07-24 |
AU2718495A (en) | 1996-02-08 |
ATE255302T1 (en) | 2003-12-15 |
PE16097A1 (en) | 1997-05-12 |
DE69532178D1 (en) | 2004-01-08 |
PL309766A1 (en) | 1996-02-05 |
JPH08195721A (en) | 1996-07-30 |
CN1117679A (en) | 1996-02-28 |
SK93895A3 (en) | 1996-02-07 |
CZ192295A3 (en) | 1996-02-14 |
NO952929D0 (en) | 1995-07-24 |
HU9502215D0 (en) | 1995-09-28 |
CA2154641C (en) | 2005-03-15 |
RU2159509C2 (en) | 2000-11-20 |
US6025954A (en) | 2000-02-15 |
TW270265B (en) | 1996-02-11 |
US5852510A (en) | 1998-12-22 |
FI953544A (en) | 1996-01-26 |
EP0695049A1 (en) | 1996-01-31 |
HUT72807A (en) | 1996-05-28 |
NZ272564A (en) | 1998-06-26 |
KR960006371A (en) | 1996-02-23 |
HU218631B (en) | 2000-10-28 |
AU710198B2 (en) | 1999-09-16 |
ITMI941573A0 (en) | 1994-07-25 |
EP0695049B1 (en) | 2003-11-26 |
NO952929L (en) | 1996-01-26 |
PL178061B1 (en) | 2000-02-29 |
ITMI941573A1 (en) | 1996-01-25 |
IT1273676B (en) | 1997-07-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20150727 |