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WO2009004720A1 - レベル低下検出装置、光増幅装置、およびレベル低下検出方法 - Google Patents

レベル低下検出装置、光増幅装置、およびレベル低下検出方法 Download PDF

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Publication number
WO2009004720A1
WO2009004720A1 PCT/JP2007/063311 JP2007063311W WO2009004720A1 WO 2009004720 A1 WO2009004720 A1 WO 2009004720A1 JP 2007063311 W JP2007063311 W JP 2007063311W WO 2009004720 A1 WO2009004720 A1 WO 2009004720A1
Authority
WO
WIPO (PCT)
Prior art keywords
threshold value
light
level
signal
unit
Prior art date
Application number
PCT/JP2007/063311
Other languages
English (en)
French (fr)
Inventor
Kousuke Komaki
Original Assignee
Fujitsu Limited
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 Fujitsu Limited filed Critical Fujitsu Limited
Priority to PCT/JP2007/063311 priority Critical patent/WO2009004720A1/ja
Priority to JP2009521481A priority patent/JP4900482B2/ja
Publication of WO2009004720A1 publication Critical patent/WO2009004720A1/ja
Priority to US12/654,543 priority patent/US20100104276A1/en

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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
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0775—Performance monitoring and measurement of transmission parameters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/05—Construction or shape of optical resonators; Accommodation of active medium therein; Shape of active medium
    • H01S3/06—Construction or shape of active medium
    • H01S3/063—Waveguide lasers, i.e. whereby the dimensions of the waveguide are of the order of the light wavelength
    • H01S3/067—Fibre lasers
    • H01S3/06754—Fibre amplifiers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
    • H01S3/10—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating
    • H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
    • H01S3/1305—Feedback control systems

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

　光増幅時の入力光に対するダイナミックレンジを大きくしても、データが重畳された信号光のレベル低下を確実に検出すること。この課題を解決するために、閾値比較部（２５３）は、信号光レベルと所定の閾値とを比較し、比較結果を信号低下通知部（２５６）へ出力する。差分算出部（２５４）は、監視光レベルから信号光レベルを減算し、差分Δを算出する。閾値比較部（２５５）は、監視光と信号光のレベル差ΔＰを所定の相対閾値と比較し、比較結果を信号低下通知部（２５６）へ出力する。信号低下通知部（２５６）は、閾値比較部（２５３）の比較結果において信号光レベルが所定の閾値以下であることを示す場合や、閾値比較部（２５５）の比較結果においてレベル差ΔＰが相対閾値以上であることを示す場合に、信号光のみの光強度が低下していることを警告する低下警報を制御部（１２０）へ出力する。
PCT/JP2007/063311 2007-07-03 2007-07-03 レベル低下検出装置、光増幅装置、およびレベル低下検出方法 WO2009004720A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/JP2007/063311 WO2009004720A1 (ja) 2007-07-03 2007-07-03 レベル低下検出装置、光増幅装置、およびレベル低下検出方法
JP2009521481A JP4900482B2 (ja) 2007-07-03 2007-07-03 レベル低下検出装置、光増幅装置、およびレベル低下検出方法
US12/654,543 US20100104276A1 (en) 2007-07-03 2009-12-22 Level decline detecting apparatus, optical amplifier apparatus, and level decline detecting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2007/063311 WO2009004720A1 (ja) 2007-07-03 2007-07-03 レベル低下検出装置、光増幅装置、およびレベル低下検出方法

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/654,543 Continuation US20100104276A1 (en) 2007-07-03 2009-12-22 Level decline detecting apparatus, optical amplifier apparatus, and level decline detecting method

Publications (1)

Publication Number Publication Date
WO2009004720A1 true WO2009004720A1 (ja) 2009-01-08

Family

ID=40225790

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/063311 WO2009004720A1 (ja) 2007-07-03 2007-07-03 レベル低下検出装置、光増幅装置、およびレベル低下検出方法

Country Status (3)

Country Link
US (1) US20100104276A1 (ja)
JP (1) JP4900482B2 (ja)
WO (1) WO2009004720A1 (ja)

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NZ599239A (en) * 2007-03-14 2013-10-25 Endocyte Inc Binding ligand linked drug delivery conjugates of tubulysins
US8355631B2 (en) * 2010-01-29 2013-01-15 Ciena Corporation Reducing optical service channel interference in phase modulated wavelength division multiplexed (WDM) communication systems
JP5994508B2 (ja) * 2012-09-18 2016-09-21 富士通株式会社 送信装置、通信システム、及び送信レベルの制御方法
US9276696B2 (en) * 2012-10-19 2016-03-01 Ciena Corporation Systems and methods for channel additions over multiple cascaded optical nodes
JP2017073739A (ja) * 2015-10-09 2017-04-13 富士通株式会社 伝送装置及び光ファイバの接続確認方法
US9986317B1 (en) 2016-11-29 2018-05-29 Ciena Corporation Systems and methods modeling optical sources in optical spectrum controllers for control thereof
US9985726B1 (en) 2016-11-29 2018-05-29 Ciena Corporation Systems and methods for a preemptive controller for photonic line systems
US10050737B1 (en) * 2017-05-04 2018-08-14 Ciena Corporation Methods and apparatus for pre-programming layer-0 service turn up speeds for photonic service provisioning or restoration
US10536235B2 (en) 2017-05-04 2020-01-14 Ciena Corporation Logical control seams in optical networks to improve restoration speed or timing for capacity adds
US10686543B1 (en) 2019-03-05 2020-06-16 Ciena Corporation Time and margin constrained routing, spectrum, and restoration speed assignment in optical networks

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JPH05244098A (ja) * 1992-02-28 1993-09-21 Hitachi Ltd 光送信装置、光中継装置、光受信装置、光ファイバ伝送システム、及び、その監視方法
JPH08181656A (ja) * 1994-12-22 1996-07-12 Kokusai Denshin Denwa Co Ltd <Kdd> 光波長多重通信伝送路の監視装置
JPH0918416A (ja) * 1995-06-28 1997-01-17 Hitachi Ltd 光増幅器
JP2000307552A (ja) * 1999-04-16 2000-11-02 Nec Corp 波長多重光伝送用光増幅装置
JP2004228404A (ja) * 2003-01-24 2004-08-12 Fujitsu Ltd 偏波モード分散補償機能を有する光増幅器

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JPH0837497A (ja) * 1994-05-20 1996-02-06 Fujitsu Ltd 光増幅器及び光送信装置
JP2748908B2 (ja) * 1995-10-19 1998-05-13 日本電気株式会社 光伝送路特性測定方法とその装置および光波長多重伝送方法とその装置
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US5859716A (en) * 1996-01-18 1999-01-12 Northern Telecom Limited Self-stimulation signal detection in an optical transmission system
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05244098A (ja) * 1992-02-28 1993-09-21 Hitachi Ltd 光送信装置、光中継装置、光受信装置、光ファイバ伝送システム、及び、その監視方法
JPH08181656A (ja) * 1994-12-22 1996-07-12 Kokusai Denshin Denwa Co Ltd <Kdd> 光波長多重通信伝送路の監視装置
JPH0918416A (ja) * 1995-06-28 1997-01-17 Hitachi Ltd 光増幅器
JP2000307552A (ja) * 1999-04-16 2000-11-02 Nec Corp 波長多重光伝送用光増幅装置
JP2004228404A (ja) * 2003-01-24 2004-08-12 Fujitsu Ltd 偏波モード分散補償機能を有する光増幅器

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JP4900482B2 (ja) 2012-03-21
US20100104276A1 (en) 2010-04-29
JPWO2009004720A1 (ja) 2010-08-26

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