DE69737190D1 - Verfahren zur Änderung der Anzahl Kanäle in einem optischen Kommunikationsnetzwerk - Google Patents
Verfahren zur Änderung der Anzahl Kanäle in einem optischen KommunikationsnetzwerkInfo
- Publication number
- DE69737190D1 DE69737190D1 DE69737190T DE69737190T DE69737190D1 DE 69737190 D1 DE69737190 D1 DE 69737190D1 DE 69737190 T DE69737190 T DE 69737190T DE 69737190 T DE69737190 T DE 69737190T DE 69737190 D1 DE69737190 D1 DE 69737190D1
- Authority
- DE
- Germany
- Prior art keywords
- channels
- changing
- communication network
- optical communication
- 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 - Lifetime
Links
- 230000003287 optical effect Effects 0.000 title 1
Classifications
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- 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
- H01S3/06758—Tandem 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
- H01S3/1301—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers
- H01S3/13013—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers by controlling the optical pumping
-
- 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
-
- 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
- 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
- H04B10/294—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
- 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
- H04B10/296—Transient power control, e.g. due to channel add/drop or rapid fluctuations in the input power
-
- 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
- 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
- H01S2301/00—Functional characteristics
- H01S2301/04—Gain spectral shaping, flattening
-
- 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
- H01S3/10015—Controlling the intensity, frequency, phase, polarisation or direction of the emitted radiation, e.g. switching, gating, modulating or demodulating in optical amplifiers by monitoring or controlling, e.g. attenuating, the input signal
-
- 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
- H01S3/1003—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 tunable optical elements, e.g. acousto-optic filters, tunable gratings
-
- 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
- H01S3/1301—Stabilisation of laser output parameters, e.g. frequency or amplitude in optical amplifiers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2210/00—Indexing scheme relating to optical transmission systems
- H04B2210/003—Devices including multiple stages, e.g., multi-stage optical amplifiers or dispersion compensators
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
- Lasers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11144796 | 1996-05-02 | ||
JP11144796 | 1996-05-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69737190D1 true DE69737190D1 (de) | 2007-02-15 |
DE69737190T2 DE69737190T2 (de) | 2007-11-08 |
Family
ID=14561441
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1997637190 Expired - Lifetime DE69737190T2 (de) | 1996-05-02 | 1997-04-30 | Verfahren zur Änderung der Anzahl Kanäle in einem optischen Kommunikationsnetzwerk |
DE1997637813 Expired - Lifetime DE69737813T2 (de) | 1996-05-02 | 1997-04-30 | Optisches Kommunikationssystem mit optischer Verstärkung |
DE69739010T Expired - Lifetime DE69739010D1 (de) | 1996-05-02 | 1997-04-30 | Vorrichtung und Verfahren zur Verstärkung eines optischen Signals und optisches Übertragungssystem |
DE1997637802 Expired - Lifetime DE69737802T2 (de) | 1996-05-02 | 1997-04-30 | Regler eines variablen optischen Dämpfers zur Regelung des Leistungsniveaus eines optischen Wellenmultiplexsignales falls die Zahl der Kanäle variiert |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1997637813 Expired - Lifetime DE69737813T2 (de) | 1996-05-02 | 1997-04-30 | Optisches Kommunikationssystem mit optischer Verstärkung |
DE69739010T Expired - Lifetime DE69739010D1 (de) | 1996-05-02 | 1997-04-30 | Vorrichtung und Verfahren zur Verstärkung eines optischen Signals und optisches Übertragungssystem |
DE1997637802 Expired - Lifetime DE69737802T2 (de) | 1996-05-02 | 1997-04-30 | Regler eines variablen optischen Dämpfers zur Regelung des Leistungsniveaus eines optischen Wellenmultiplexsignales falls die Zahl der Kanäle variiert |
Country Status (6)
Country | Link |
---|---|
US (14) | US6025947A (de) |
EP (6) | EP1578047B1 (de) |
JP (1) | JP2000196534A (de) |
KR (5) | KR100289013B1 (de) |
CN (5) | CN100477572C (de) |
DE (4) | DE69737190T2 (de) |
Families Citing this family (195)
Publication number | Priority date | Publication date | Assignee | Title |
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JP3306693B2 (ja) | 1995-01-19 | 2002-07-24 | 富士通株式会社 | 光増幅装置,光波長多重通信システム,光端局装置及び光中継装置 |
JP2000077757A (ja) * | 1998-08-28 | 2000-03-14 | Hitachi Ltd | 光増幅器、光伝送装置および光伝送システム |
US6025947A (en) * | 1996-05-02 | 2000-02-15 | Fujitsu Limited | Controller which controls a variable optical attenuator to control the power level of a wavelength-multiplexed optical signal when the number of channels are varied |
US6369938B1 (en) | 1996-05-28 | 2002-04-09 | Fujitsu Limited | Multi-wavelength light amplifier |
GB2314714B (en) * | 1996-06-26 | 2000-04-05 | Northern Telecom Ltd | Optical amplifier modules |
JP3821920B2 (ja) * | 1996-09-17 | 2006-09-13 | 富士通株式会社 | 光通信システム |
JP2914334B2 (ja) * | 1997-01-20 | 1999-06-28 | 日本電気株式会社 | 光波長多重通信システムの光増幅器出力レベル制御方式 |
JP3542253B2 (ja) * | 1997-06-19 | 2004-07-14 | 株式会社日立コミュニケーションテクノロジー | 光ファイバ増幅器およびそれを用いた光伝送システム |
US6078418A (en) * | 1997-08-12 | 2000-06-20 | Lucent Technologies Inc. | Wavelength locking of variable dispersive elements |
JPH11122192A (ja) * | 1997-10-17 | 1999-04-30 | Fujitsu Ltd | 光増幅器及び該光増幅器を備えた光通信システム |
JP3050299B2 (ja) * | 1997-11-17 | 2000-06-12 | 日本電気株式会社 | 波長多重伝送装置 |
JP3829962B2 (ja) * | 1998-01-22 | 2006-10-04 | 富士通株式会社 | 光アッテネータ並びに該光アッテネータを備えたシステム、光増幅器及び端局装置 |
KR19990069330A (ko) * | 1998-02-06 | 1999-09-06 | 윤종용 | 채널당 출력파워가 일정한 광증폭기 및 이를위한 방법 |
WO1999040695A1 (fr) | 1998-02-06 | 1999-08-12 | Fujitsu Limited | Amplificateur optique, procede de commande de la source de lumiere d'excitation dans un amplificateur optique et procede de commande de l'amplificateur optique |
US5966493A (en) * | 1998-02-20 | 1999-10-12 | Molecular Optoelectronics Corporation | Fiber optic attenuators and attenuation systems |
US6441955B1 (en) | 1998-02-27 | 2002-08-27 | Fujitsu Limited | Light wavelength-multiplexing systems |
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1997
- 1997-04-28 US US08/845,847 patent/US6025947A/en not_active Expired - Lifetime
- 1997-04-30 CN CNB021232474A patent/CN100477572C/zh not_active Expired - Lifetime
- 1997-04-30 EP EP20040025192 patent/EP1578047B1/de not_active Expired - Lifetime
- 1997-04-30 CN CNB021232458A patent/CN100477571C/zh not_active Expired - Lifetime
- 1997-04-30 EP EP19980123442 patent/EP0902565B1/de not_active Expired - Lifetime
- 1997-04-30 CN CNB021232466A patent/CN100477563C/zh not_active Expired - Lifetime
- 1997-04-30 EP EP19980123443 patent/EP0902566B9/de not_active Expired - Lifetime
- 1997-04-30 DE DE1997637190 patent/DE69737190T2/de not_active Expired - Lifetime
- 1997-04-30 CN CNB021232482A patent/CN100477573C/zh not_active Expired - Lifetime
- 1997-04-30 EP EP20100185439 patent/EP2296303B1/de not_active Expired - Lifetime
- 1997-04-30 DE DE1997637813 patent/DE69737813T2/de not_active Expired - Lifetime
- 1997-04-30 DE DE69739010T patent/DE69739010D1/de not_active Expired - Lifetime
- 1997-04-30 DE DE1997637802 patent/DE69737802T2/de not_active Expired - Lifetime
- 1997-04-30 EP EP19970107189 patent/EP0805571B1/de not_active Expired - Lifetime
- 1997-04-30 CN CN97110838A patent/CN1121626C/zh not_active Expired - Lifetime
- 1997-04-30 EP EP19980123445 patent/EP0902567A3/de not_active Ceased
- 1997-05-02 KR KR1019970016962A patent/KR100289013B1/ko not_active IP Right Cessation
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1998
- 1998-08-25 US US09/139,768 patent/US5995274A/en not_active Expired - Lifetime
- 1998-09-22 US US09/158,571 patent/US5966237A/en not_active Expired - Lifetime
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1999
- 1999-06-09 US US09/328,368 patent/US6157481A/en not_active Expired - Lifetime
- 1999-07-28 US US09/362,120 patent/US6198572B1/en not_active Expired - Lifetime
- 1999-09-20 US US09/399,225 patent/US6144485A/en not_active Expired - Lifetime
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2000
- 2000-02-10 JP JP2000033017A patent/JP2000196534A/ja active Pending
- 2000-06-30 KR KR1020000037167A patent/KR100326419B1/ko not_active IP Right Cessation
- 2000-06-30 KR KR1020000037164A patent/KR100326635B1/ko not_active IP Right Cessation
- 2000-06-30 KR KR1020000037165A patent/KR100326417B1/ko not_active IP Right Cessation
- 2000-06-30 KR KR1020000037168A patent/KR100326418B1/ko not_active IP Right Cessation
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2001
- 2001-03-20 US US09/811,787 patent/US6377395B2/en not_active Expired - Lifetime
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2002
- 2002-01-29 US US10/057,866 patent/US6646791B2/en not_active Expired - Lifetime
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2003
- 2003-08-29 US US10/650,990 patent/US6865016B2/en not_active Expired - Lifetime
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2004
- 2004-10-04 US US10/956,107 patent/US7227681B2/en not_active Expired - Fee Related
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2007
- 2007-04-30 US US11/742,508 patent/US7477447B2/en not_active Expired - Fee Related
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2008
- 2008-12-04 US US12/328,266 patent/US7969649B2/en not_active Expired - Fee Related
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2011
- 2011-04-29 US US13/097,669 patent/US8553319B2/en not_active Expired - Fee Related
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2013
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