FR2774483B1 - Systeme d'egalisation de gain - Google Patents

Systeme d'egalisation de gain

Info

Publication number
FR2774483B1
FR2774483B1 FR9901431A FR9901431A FR2774483B1 FR 2774483 B1 FR2774483 B1 FR 2774483B1 FR 9901431 A FR9901431 A FR 9901431A FR 9901431 A FR9901431 A FR 9901431A FR 2774483 B1 FR2774483 B1 FR 2774483B1
Authority
FR
France
Prior art keywords
equalization system
gain equalization
gain
equalization
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
FR9901431A
Other languages
English (en)
Other versions
FR2774483A1 (fr
Inventor
Takafumi Terahara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Ltd filed Critical Fujitsu Ltd
Publication of FR2774483A1 publication Critical patent/FR2774483A1/fr
Application granted granted Critical
Publication of FR2774483B1 publication Critical patent/FR2774483B1/fr
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
    • H04B10/294—Signal power control in a multiwavelength system, e.g. gain equalisation
    • H04B10/2941—Signal power control in a multiwavelength system, e.g. gain equalisation using an equalising unit, e.g. a filter
    • 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
    • H01S3/10007—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers
    • H01S3/10023—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by functional association of additional optical elements, e.g. filters, gratings, reflectors
    • 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
    • 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
    • H04J14/02216—Power control, e.g. to keep the total optical power constant by gain equalization
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2210/00—Indexing scheme relating to optical transmission systems
    • H04B2210/25—Distortion or dispersion compensation
    • H04B2210/258—Distortion or dispersion compensation treating each wavelength or wavelength band separately

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Optical Communication System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
FR9901431A 1998-02-04 1999-02-08 Systeme d'egalisation de gain Expired - Fee Related FR2774483B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP02353698A JP3638777B2 (ja) 1998-02-04 1998-02-04 利得等化のための方法並びに該方法の実施に使用する装置及びシステム

Publications (2)

Publication Number Publication Date
FR2774483A1 FR2774483A1 (fr) 1999-08-06
FR2774483B1 true FR2774483B1 (fr) 2000-06-23

Family

ID=12113194

Family Applications (3)

Application Number Title Priority Date Filing Date
FR9809854A Expired - Fee Related FR2774482B1 (fr) 1998-02-04 1998-07-31 Procede d'egalisation de gain, dispositif et systeme pour une utilisation dans la mise en oeuvre du procede
FR9901431A Expired - Fee Related FR2774483B1 (fr) 1998-02-04 1999-02-08 Systeme d'egalisation de gain
FR9901432A Expired - Fee Related FR2774532B1 (fr) 1998-02-04 1999-02-08 Egaliseur de gain variable applique a une certaine longueur de fibre optique

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR9809854A Expired - Fee Related FR2774482B1 (fr) 1998-02-04 1998-07-31 Procede d'egalisation de gain, dispositif et systeme pour une utilisation dans la mise en oeuvre du procede

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR9901432A Expired - Fee Related FR2774532B1 (fr) 1998-02-04 1999-02-08 Egaliseur de gain variable applique a une certaine longueur de fibre optique

Country Status (3)

Country Link
US (6) US6219176B1 (fr)
JP (1) JP3638777B2 (fr)
FR (3) FR2774482B1 (fr)

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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
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US6693737B2 (en) 1998-03-24 2004-02-17 Xtera Communications, Inc. Dispersion compensating nonlinear polarization amplifiers
US6335820B1 (en) 1999-12-23 2002-01-01 Xtera Communications, Inc. Multi-stage optical amplifier and broadband communication system
US6359725B1 (en) 1998-06-16 2002-03-19 Xtera Communications, Inc. Multi-stage optical amplifier and broadband communication system
US6839522B2 (en) * 1998-07-21 2005-01-04 Corvis Corporation Optical signal varying devices, systems and methods
US6344922B1 (en) * 1998-07-21 2002-02-05 Corvis Corporation Optical signal varying devices
JP3134854B2 (ja) * 1998-09-07 2001-02-13 日本電気株式会社 光増幅器
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JP4635402B2 (ja) * 1999-07-09 2011-02-23 住友電気工業株式会社 光増幅器及び光増幅方法
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Also Published As

Publication number Publication date
US20020041433A1 (en) 2002-04-11
FR2774483A1 (fr) 1999-08-06
US6381064B1 (en) 2002-04-30
FR2774482A1 (fr) 1999-08-06
US6580551B2 (en) 2003-06-17
US6829083B2 (en) 2004-12-07
JPH11224967A (ja) 1999-08-17
US20050094253A1 (en) 2005-05-05
FR2774532A1 (fr) 1999-08-06
US6219176B1 (en) 2001-04-17
US20040136054A1 (en) 2004-07-15
FR2774482B1 (fr) 2000-06-30
FR2774532B1 (fr) 2001-02-16
US6693739B2 (en) 2004-02-17
US20030123135A1 (en) 2003-07-03
JP3638777B2 (ja) 2005-04-13

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