GB2324667B - Optical signal amplification control system - Google Patents

Optical signal amplification control system

Info

Publication number
GB2324667B
GB2324667B GB9808861A GB9808861A GB2324667B GB 2324667 B GB2324667 B GB 2324667B GB 9808861 A GB9808861 A GB 9808861A GB 9808861 A GB9808861 A GB 9808861A GB 2324667 B GB2324667 B GB 2324667B
Authority
GB
United Kingdom
Prior art keywords
control system
optical signal
signal amplification
amplification control
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.)
Expired - Fee Related
Application number
GB9808861A
Other versions
GB9808861D0 (en
GB2324667A (en
Inventor
Hiroshi Harano
Masano Amimoto
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 GB9808861D0 publication Critical patent/GB9808861D0/en
Publication of GB2324667A publication Critical patent/GB2324667A/en
Application granted granted Critical
Publication of GB2324667B publication Critical patent/GB2324667B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal
    • H04B10/0795—Performance monitoring; Measurement of transmission parameters
    • H04B10/07955—Monitoring or measuring power
GB9808861A 1997-04-25 1998-04-24 Optical signal amplification control system Expired - Fee Related GB2324667B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9121505A JPH10303821A (en) 1997-04-25 1997-04-25 Optical signal amplification and transmission system

Publications (3)

Publication Number Publication Date
GB9808861D0 GB9808861D0 (en) 1998-06-24
GB2324667A GB2324667A (en) 1998-10-28
GB2324667B true GB2324667B (en) 1999-06-16

Family

ID=14812863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9808861A Expired - Fee Related GB2324667B (en) 1997-04-25 1998-04-24 Optical signal amplification control system

Country Status (4)

Country Link
JP (1) JPH10303821A (en)
CA (1) CA2235915A1 (en)
FR (1) FR2762733A1 (en)
GB (1) GB2324667B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3166695B2 (en) 1998-01-05 2001-05-14 日本電気株式会社 Wavelength division multiplex transmitter
KR100322125B1 (en) * 1999-01-14 2002-02-04 윤종용 AWG module and method for monitoring optical signal using AWG module
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
GB2360654A (en) * 2000-03-25 2001-09-26 Marconi Comm Ltd Power controlling network element for adding new channels in a controlled manner
GB2362525B (en) * 2000-05-18 2002-07-24 Marconi Comm Ltd Radiation power equalization in wavelength division multiplexing (WDM) optical communication system
GB2366925A (en) * 2000-09-13 2002-03-20 Marconi Comm Ltd Power control and equalisation in an optical WDM system
JP4074750B2 (en) * 2001-02-20 2008-04-09 株式会社日立製作所 Optical amplification apparatus and gain characteristic monitoring method thereof
US6826331B2 (en) 2001-09-28 2004-11-30 Bookham Technology Plc Method of extracting spectral parameters of channels from non-channelized light
EP2020767B1 (en) 2006-05-25 2017-08-02 Mitsubishi Electric Corporation Optical relay device and optical relay transmission system
JP4864771B2 (en) * 2007-03-06 2012-02-01 日本電信電話株式会社 Optical signal monitoring apparatus, optical system, and optical signal monitoring method
WO2009093304A1 (en) 2008-01-22 2009-07-30 Mitsubishi Electric Corporation Optical transmission system and repeater
JP5858465B2 (en) * 2011-12-19 2016-02-10 富士通株式会社 Optical communication device, wavelength number measuring device, optical repeater, and wavelength number measuring method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280561A (en) * 1993-07-31 1995-02-01 Northern Telecom Ltd Optical transmission system
GB2294170A (en) * 1994-09-26 1996-04-17 Fujitsu Ltd Optical amplification of wavelength-division-multiplexed signals
EP0782289A1 (en) * 1995-12-28 1997-07-02 Nec Corporation Wavelength multiplexing optical transmission device
EP0801475A2 (en) * 1996-04-09 1997-10-15 Nec Corporation Optical amplifying apparatus and linear relay optical amplifier transmitter
EP0812078A2 (en) * 1996-05-31 1997-12-10 Fujitsu Limited Optical communication system and optical amplifier
EP0817415A2 (en) * 1996-07-04 1998-01-07 Nec Corporation Wavelength-division-multiplexing optical amplifier device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2280561A (en) * 1993-07-31 1995-02-01 Northern Telecom Ltd Optical transmission system
GB2294170A (en) * 1994-09-26 1996-04-17 Fujitsu Ltd Optical amplification of wavelength-division-multiplexed signals
EP0782289A1 (en) * 1995-12-28 1997-07-02 Nec Corporation Wavelength multiplexing optical transmission device
EP0801475A2 (en) * 1996-04-09 1997-10-15 Nec Corporation Optical amplifying apparatus and linear relay optical amplifier transmitter
EP0812078A2 (en) * 1996-05-31 1997-12-10 Fujitsu Limited Optical communication system and optical amplifier
EP0817415A2 (en) * 1996-07-04 1998-01-07 Nec Corporation Wavelength-division-multiplexing optical amplifier device

Also Published As

Publication number Publication date
GB9808861D0 (en) 1998-06-24
GB2324667A (en) 1998-10-28
FR2762733A1 (en) 1998-10-30
JPH10303821A (en) 1998-11-13
CA2235915A1 (en) 1998-10-25

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee