CA2235480A1 - Photo signal amplification transmission system - Google Patents

Photo signal amplification transmission system

Info

Publication number
CA2235480A1
CA2235480A1 CA002235480A CA2235480A CA2235480A1 CA 2235480 A1 CA2235480 A1 CA 2235480A1 CA 002235480 A CA002235480 A CA 002235480A CA 2235480 A CA2235480 A CA 2235480A CA 2235480 A1 CA2235480 A1 CA 2235480A1
Authority
CA
Canada
Prior art keywords
wavelength
number information
signal
information management
transmission system
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
Application number
CA002235480A
Other languages
French (fr)
Other versions
CA2235480C (en
Inventor
Hiroshi Harano
Naoki Maruyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of CA2235480A1 publication Critical patent/CA2235480A1/en
Application granted granted Critical
Publication of CA2235480C publication Critical patent/CA2235480C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • H04B10/293—Signal power control
    • H04B10/2931—Signal power control using AGC
    • 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
    • H04B10/2933—Signal power control considering the whole optical path
    • H04B10/2935—Signal power control considering the whole optical path with a cascade of amplifiers
    • 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
    • H04B10/2942—Signal power control in a multiwavelength system, e.g. gain equalisation using automatic gain control [AGC]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems

Abstract

In a conventional photo signal amplification transmission system, since control is performed to make constant an output power, total output powers of all wavelengths are made constant when a multi-wavelength transmission is made.
An output power of one wavelength is decreased and deviated from an optimum power. To solve the problem, a transmission photo amplifier 3, a relay photo amplifier 4 and a receiving photo amplifier 5 are provided with wavelength number information management sections 11, 12 and 13, respectively.
An amplifying means is controlled in accordance with the number of wavelengths of the multi-wavelength signal which is obtained by the wavelength number information management sections. The wavelength number information management sections 11 to 13 multiplex a wavelength number information signal onto an optical fiber cable 6 and renews the signal.
CA002235480A 1997-04-25 1998-04-21 Photo signal amplification transmission system Expired - Fee Related CA2235480C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9121504A JP3068500B2 (en) 1997-04-25 1997-04-25 Optical signal amplification transmission system
JP121504/1997 1997-04-25

Publications (2)

Publication Number Publication Date
CA2235480A1 true CA2235480A1 (en) 1998-10-25
CA2235480C CA2235480C (en) 2002-03-26

Family

ID=14812836

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002235480A Expired - Fee Related CA2235480C (en) 1997-04-25 1998-04-21 Photo signal amplification transmission system

Country Status (4)

Country Link
US (1) US6233078B1 (en)
EP (1) EP0874480A3 (en)
JP (1) JP3068500B2 (en)
CA (1) CA2235480C (en)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3102397B2 (en) * 1997-12-10 2000-10-23 日本電気株式会社 Optical WDM transmission system
US6312388B1 (en) 1999-03-12 2001-11-06 Cardiac Pacemakers, Inc. Method and system for verifying the integrity of normal sinus rhythm templates
KR20010003638A (en) * 1999-06-24 2001-01-15 윤종용 Apparatus and method for stabilizing output power of wavelength division multiplexed erbium doped fiber amplifier in respect of channel number
US6411840B1 (en) * 1999-11-16 2002-06-25 Cardiac Intelligence Corporation Automated collection and analysis patient care system and method for diagnosing and monitoring the outcomes of atrial fibrillation
US6684100B1 (en) * 2000-10-31 2004-01-27 Cardiac Pacemakers, Inc. Curvature based method for selecting features from an electrophysiologic signals for purpose of complex identification and classification
US7146101B2 (en) * 2001-11-08 2006-12-05 Altera Corporation Optical media management channel
US7058301B2 (en) 2002-02-28 2006-06-06 Bosloy Jonathan L Apparatus and method for planned wavelength addition and removal in a wavelength division multiplexed system
US6950702B2 (en) * 2002-07-15 2005-09-27 Cardiac Pacemakers, Inc. Use of curvature based features for beat detection
US7031764B2 (en) * 2002-11-08 2006-04-18 Cardiac Pacemakers, Inc. Cardiac rhythm management systems and methods using multiple morphology templates for discriminating between rhythms
US7792571B2 (en) 2003-06-27 2010-09-07 Cardiac Pacemakers, Inc. Tachyarrhythmia detection and discrimination based on curvature parameters
US7500955B2 (en) * 2003-06-27 2009-03-10 Cardiac Pacemaker, Inc. Signal compression based on curvature parameters
JP4604574B2 (en) 2004-06-29 2011-01-05 日本電気株式会社 Wavelength multiplexed optical signal transmission method, wavelength multiplexed optical signal transmission system, and optical repeater
JP4569222B2 (en) * 2004-08-24 2010-10-27 日本電気株式会社 Optical add / drop apparatus and optical add / drop method
US7277747B2 (en) * 2004-11-23 2007-10-02 Cardiac Pacemakers, Inc. Arrhythmia memory for tachyarrhythmia discrimination
JP4724226B2 (en) 2006-05-25 2011-07-13 三菱電機株式会社 Optical repeater and optical repeater transmission system
JP2007324782A (en) * 2006-05-31 2007-12-13 Nec Corp Wavelength count detection system and its method, terminal node, and wdm optical communication system using same
JP5177035B2 (en) * 2009-03-19 2013-04-03 日本電気株式会社 Wavelength division multiplexing apparatus, wavelength division multiplexing transmission system, and wavelength division multiplexing signal control method
WO2012144585A1 (en) * 2011-04-20 2012-10-26 日本電気株式会社 Diverging device with oadm function and wavelength division multiplexing optical network system and method therefor
JP6561445B2 (en) * 2014-09-30 2019-08-21 富士通株式会社 Optical amplification device, optical transmission device, and optical transmission system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2787820B2 (en) 1990-07-20 1998-08-20 キヤノン株式会社 WDM optical communication system and optical amplifier used therein
GB2280561B (en) * 1993-07-31 1997-03-26 Northern Telecom Ltd Optical transmission system
JP3232825B2 (en) 1993-11-18 2001-11-26 日本電信電話株式会社 Optical path accommodation method and optical communication network
JP3369018B2 (en) 1994-11-16 2003-01-20 富士通株式会社 Optical cross connect and wavelength division type optical transmission system using the same
JPH08264871A (en) * 1995-03-20 1996-10-11 Fujitsu Ltd Multiple-wavelength batch optical amplifier device
JPH09116506A (en) 1995-10-17 1997-05-02 Hitachi Cable Ltd Optical transmission system
JP3306700B2 (en) 1996-05-02 2002-07-24 富士通株式会社 Optical amplifier and wavelength division multiplexing optical transmission system
JPH09321701A (en) 1996-05-31 1997-12-12 Fujitsu Ltd Optical communication system and optical amplifier
JP2904131B2 (en) 1996-07-04 1999-06-14 日本電気株式会社 WDM optical amplifier and WDM optical transmission equipment

Also Published As

Publication number Publication date
EP0874480A3 (en) 2000-01-12
JPH10303823A (en) 1998-11-13
JP3068500B2 (en) 2000-07-24
EP0874480A2 (en) 1998-10-28
US6233078B1 (en) 2001-05-15
CA2235480C (en) 2002-03-26

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed

Effective date: 20150421