WO2002021203A1 - Amplificateur optique et systeme de communication optique - Google Patents
Amplificateur optique et systeme de communication optique Download PDFInfo
- Publication number
- WO2002021203A1 WO2002021203A1 PCT/JP2000/006101 JP0006101W WO0221203A1 WO 2002021203 A1 WO2002021203 A1 WO 2002021203A1 JP 0006101 W JP0006101 W JP 0006101W WO 0221203 A1 WO0221203 A1 WO 0221203A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- optical amplifying
- signal
- light
- amplification
- 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.)
- Ceased
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
- H04B10/2933—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
- 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
- H01S3/13—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
- 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
- H01S3/30—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects
- H01S3/302—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range using scattering effects, e.g. stimulated Brillouin or Raman effects in an optical fibre
-
- 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
- H04B10/2916—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 using Raman or Brillouin 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
- H01S2301/00—Functional characteristics
- H01S2301/02—ASE (amplified spontaneous emission), noise; Reduction thereof
-
- 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
- H01S3/05—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
- H01S3/06762—Fibre amplifiers having a specific amplification band
- H01S3/06766—C-band amplifiers, i.e. amplification in the range of about 1530 nm to 1560 nm
-
- 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
- H01S3/06762—Fibre amplifiers having a specific amplification band
- H01S3/0677—L-band amplifiers, i.e. amplification in the range of about 1560 nm to 1610 nm
-
- 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
- H01S3/14—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range characterised by the material used as the active medium
- H01S3/16—Solid materials
- H01S3/1601—Solid materials characterised by an active (lasing) ion
- H01S3/1603—Solid materials characterised by an active (lasing) ion rare earth
- H01S3/1608—Solid materials characterised by an active (lasing) ion rare earth erbium
-
- 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
- H01S3/23—Arrangements of two or more lasers not provided for in groups H01S3/02 - H01S3/22, e.g. tandem arrangements of separate active media
- H01S3/2383—Parallel arrangements
-
- 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
-
- 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
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Optics & Photonics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Lasers (AREA)
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP00957007A EP1229381A4 (en) | 2000-09-07 | 2000-09-07 | OPTICAL AMPLIFIER AND OPTICAL COMMUNICATION SYSTEM |
| PCT/JP2000/006101 WO2002021203A1 (fr) | 2000-09-07 | 2000-09-07 | Amplificateur optique et systeme de communication optique |
| JP2001545476A JP4565794B2 (ja) | 2000-09-07 | 2000-09-07 | 光増幅装置および光通信システム |
| US09/861,634 US6462861B2 (en) | 2000-09-07 | 2001-05-22 | Optical amplifying apparatus and optical communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2000/006101 WO2002021203A1 (fr) | 2000-09-07 | 2000-09-07 | Amplificateur optique et systeme de communication optique |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US09/861,634 Continuation US6462861B2 (en) | 2000-09-07 | 2001-05-22 | Optical amplifying apparatus and optical communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2002021203A1 true WO2002021203A1 (fr) | 2002-03-14 |
Family
ID=11736437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2000/006101 Ceased WO2002021203A1 (fr) | 2000-09-07 | 2000-09-07 | Amplificateur optique et systeme de communication optique |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US6462861B2 (ja) |
| EP (1) | EP1229381A4 (ja) |
| JP (1) | JP4565794B2 (ja) |
| WO (1) | WO2002021203A1 (ja) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004294587A (ja) * | 2003-03-26 | 2004-10-21 | Fujitsu Ltd | 光伝送装置 |
| EP1384098A4 (en) * | 2001-04-30 | 2004-12-15 | Avanex Corp | Method of operating a noise-compensating gain controller for an optical amplifier |
| US7505197B2 (en) | 2003-03-13 | 2009-03-17 | Fujitsu Limited | Optical amplifier provided with control function of pumping light, and optical transmission system using the same |
| US8086106B2 (en) | 2008-07-31 | 2011-12-27 | Fujitsu Limited | WDM optical transmission system and controlling method thereof |
| AU2008240722B2 (en) * | 2007-04-19 | 2012-02-02 | Qualcomm Incorporated | Voice and position localization |
| JP2019211590A (ja) * | 2018-06-04 | 2019-12-12 | 富士通株式会社 | ラマン光増幅器及びラマン光増幅方法 |
Families Citing this family (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8431881B2 (en) * | 2000-09-15 | 2013-04-30 | Kollsman, Inc. | Night vision goggles with pellicle |
| US7800043B2 (en) * | 2000-09-15 | 2010-09-21 | Night Vision Corporation | Night vision goggles with detachable or reattachable modular components |
| DE10056328A1 (de) * | 2000-11-14 | 2002-05-29 | Siemens Ag | Raman-Verstärker mit mehreren Pumpquellen |
| JP2002182253A (ja) * | 2000-12-12 | 2002-06-26 | Sumitomo Electric Ind Ltd | 光源安全装置、ラマン増幅器および光伝送システム |
| JP2002250947A (ja) * | 2001-02-23 | 2002-09-06 | Fujitsu Ltd | ラマン励起制御方法及び、これを用いる光伝送装置 |
| US20020131131A1 (en) * | 2001-03-16 | 2002-09-19 | Nagel Jonathan A. | Optical communication system using L-band wavelengths |
| JP3790455B2 (ja) * | 2001-10-12 | 2006-06-28 | 富士通株式会社 | 光中継器の監視制御方法および監視制御システム |
| JP2003124881A (ja) * | 2001-10-15 | 2003-04-25 | Fujitsu Ltd | 光伝送装置および光伝送システム |
| JP2003163642A (ja) * | 2001-11-28 | 2003-06-06 | Fujitsu Ltd | 光伝送装置および光伝送モジュール |
| JP3992565B2 (ja) * | 2002-08-27 | 2007-10-17 | 富士通株式会社 | 光伝送システム |
| JP3934529B2 (ja) * | 2002-10-30 | 2007-06-20 | 富士通株式会社 | 波長多重光通信システム |
| JP4101024B2 (ja) * | 2002-11-06 | 2008-06-11 | 富士通株式会社 | ロスポイント有無判定方法及びそれを用いた分布型ラマン増幅装置 |
| JP4046602B2 (ja) * | 2002-12-06 | 2008-02-13 | 三菱電機株式会社 | ラマン増幅器および光中継伝送システム |
| EP1503528B1 (en) * | 2003-04-03 | 2016-05-18 | Mitsubishi Denki Kabushiki Kaisha | Optical amplifier and optical communication system |
| US7554721B2 (en) * | 2003-08-01 | 2009-06-30 | Fujitsu Limited | Raman amplifier and Raman amplifier adjustment method |
| JP2005286906A (ja) * | 2004-03-30 | 2005-10-13 | Fujitsu Ltd | 波長分散補償方法及びその装置 |
| US20080050121A1 (en) * | 2004-06-17 | 2008-02-28 | Evangelides Stephen G | Submarine optical transmission systems having optical amplifiers of unitary design |
| US7436582B2 (en) * | 2005-11-15 | 2008-10-14 | At&T Corp. | Fast dynamic gain control in a bidirectionally-pumped Raman fiber amplifier |
| WO2006137123A1 (ja) * | 2005-06-20 | 2006-12-28 | Fujitsu Limited | ラマン光増幅器 |
| JP4872282B2 (ja) * | 2005-09-08 | 2012-02-08 | セイコーエプソン株式会社 | 画像表示システム,画像表示方法,画像表示プログラム,記録媒体,データ処理装置,画像表示装置 |
| US7280270B2 (en) * | 2005-11-15 | 2007-10-09 | At&T Corporation | Fast dynamic gain control in cascaded Raman fiber amplifiers |
| US7277221B2 (en) * | 2005-11-15 | 2007-10-02 | At&T Corp. | Fast dynamic gain control in cascaded Raman fiber amplifiers |
| US20070109623A1 (en) * | 2005-11-15 | 2007-05-17 | At&T Corp. | Fast Dynamic Gain Control in a Bidirectionally-Pumped Raman Fiber Amplifier |
| WO2008050386A1 (en) * | 2006-10-23 | 2008-05-02 | Fujitsu Limited | Light transmitting device |
| KR100912296B1 (ko) * | 2007-09-20 | 2009-08-17 | 한국전자통신연구원 | 광 감시 채널 역할을 보장한 네트워크 장치 및 방법 |
| JP5151453B2 (ja) * | 2007-12-20 | 2013-02-27 | 富士通株式会社 | 光増幅器を用いた光伝送システム |
| JP4555352B2 (ja) * | 2008-02-04 | 2010-09-29 | 富士通株式会社 | 光通信装置および光通信方法 |
| JP2012506626A (ja) * | 2008-10-23 | 2012-03-15 | テレフオンアクチーボラゲット エル エム エリクソン(パブル) | 光ネットワーク増幅器ノードとチャネルパワーの目減りを補償する方法 |
| US9059799B2 (en) | 2011-04-21 | 2015-06-16 | Futurewei Technologies, Inc. | Apparatus and method to calculate a noise figure of an optical amplifier for wavelength channels in a partial-fill scenario to account for channel loading |
| CN102307068B (zh) * | 2011-06-24 | 2015-04-01 | 武汉光迅科技股份有限公司 | 一种实现目标拉曼增益锁定的方法及其拉曼光纤放大器 |
| US8854726B2 (en) * | 2012-03-13 | 2014-10-07 | Adva Optical Networking Se | Method for controlling signal gain of a Raman amplifier |
| US8873135B2 (en) * | 2012-12-21 | 2014-10-28 | Ciena Corporation | Extended dynamic range optical amplifier |
| KR101489279B1 (ko) * | 2013-06-27 | 2015-02-04 | 주식회사 라이콤 | 자기 자동이득제어 분산형 라만증폭기의 자동이득제어방법 |
| JP2017017605A (ja) * | 2015-07-03 | 2017-01-19 | 富士通株式会社 | 伝送路損失測定装置、伝送路損失測定方法、及び、光伝送システム |
| EP3300265B1 (en) * | 2016-09-22 | 2018-12-26 | Xieon Networks S.à r.l. | Raman pumping arrangement with improved osc sensitivity |
| JP7464841B2 (ja) * | 2020-08-04 | 2024-04-10 | 富士通株式会社 | ラマン増幅器の制御装置および制御方法 |
| US11522629B2 (en) * | 2021-01-21 | 2022-12-06 | Ciena Corporation | Channelized optical amplifiers and amplifier arrays |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122835A (ja) * | 1994-10-27 | 1996-05-17 | Nippon Telegr & Teleph Corp <Ntt> | 光ソリトン中継器および中継方式 |
| JPH1022931A (ja) * | 1996-06-28 | 1998-01-23 | Nippon Telegr & Teleph Corp <Ntt> | 光中継伝送システム |
| JPH11112434A (ja) * | 1997-10-01 | 1999-04-23 | Nippon Telegr & Teleph Corp <Ntt> | 光ファイバ増幅器 |
| EP1018666A1 (en) * | 1998-07-23 | 2000-07-12 | The Furukawa Electric Co., Ltd. | Raman amplifier, optical repeater, and raman amplification method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5430572A (en) * | 1993-09-30 | 1995-07-04 | At&T Corp. | High power, high gain, low noise, two-stage optical amplifier |
| JP4115027B2 (ja) * | 1998-07-23 | 2008-07-09 | 古河電気工業株式会社 | 励起光発生手段と、ラマン増幅器とそれを用いた光中継器 |
| JP2001223641A (ja) * | 2000-02-14 | 2001-08-17 | Sumitomo Electric Ind Ltd | 光伝送システム及び光伝送方法 |
-
2000
- 2000-09-07 EP EP00957007A patent/EP1229381A4/en not_active Withdrawn
- 2000-09-07 WO PCT/JP2000/006101 patent/WO2002021203A1/ja not_active Ceased
- 2000-09-07 JP JP2001545476A patent/JP4565794B2/ja not_active Expired - Fee Related
-
2001
- 2001-05-22 US US09/861,634 patent/US6462861B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122835A (ja) * | 1994-10-27 | 1996-05-17 | Nippon Telegr & Teleph Corp <Ntt> | 光ソリトン中継器および中継方式 |
| JPH1022931A (ja) * | 1996-06-28 | 1998-01-23 | Nippon Telegr & Teleph Corp <Ntt> | 光中継伝送システム |
| JPH11112434A (ja) * | 1997-10-01 | 1999-04-23 | Nippon Telegr & Teleph Corp <Ntt> | 光ファイバ増幅器 |
| EP1018666A1 (en) * | 1998-07-23 | 2000-07-12 | The Furukawa Electric Co., Ltd. | Raman amplifier, optical repeater, and raman amplification method |
Non-Patent Citations (3)
| Title |
|---|
| H. MASUDA ET AL.: "Wide-band and low noise optical amplification using distributed Raman amplifiers and erbium-doped fiber amplifiers", 24TH EUROPEAN CONFERENCE ON OPTICAL COMMUNICATION. ECOC'98, vol. 1, 1998, pages 51 - 52, XP002934783 * |
| P.B. HANSEN: "Remote amplification in optical transmission systems", CONFERENCE PROCEEDINGS. LEOS'97, 10TH ANNUAL MEETING. IEEE LASERS AND ELECTRO-OPTICS SOCIETY 1997 ANNUAL MEETING, vol. 1, 1997, pages 224 - 225, XP002934781 * |
| S. KAWAI ET AL.: "Wide-bandwith and long-distance WDM transmission using highly gain-flattened hybrid amplifier", IEEE PHOTONICS TECHNOLOGY LETTERS, vol. 11, no. 7, 1999, pages 886 - 888, XP002934782 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1384098A4 (en) * | 2001-04-30 | 2004-12-15 | Avanex Corp | Method of operating a noise-compensating gain controller for an optical amplifier |
| US7505197B2 (en) | 2003-03-13 | 2009-03-17 | Fujitsu Limited | Optical amplifier provided with control function of pumping light, and optical transmission system using the same |
| US7719758B2 (en) | 2003-03-13 | 2010-05-18 | Fujitsu Limited | Optical amplifier provided with control function of pumping light, and optical transmission system using the same |
| US8054455B2 (en) | 2003-03-13 | 2011-11-08 | Fujitsu Limited | Optical amplifier provided with control function of pumping light, and optical transmission system using the same |
| JP2004294587A (ja) * | 2003-03-26 | 2004-10-21 | Fujitsu Ltd | 光伝送装置 |
| AU2008240722B2 (en) * | 2007-04-19 | 2012-02-02 | Qualcomm Incorporated | Voice and position localization |
| US8086106B2 (en) | 2008-07-31 | 2011-12-27 | Fujitsu Limited | WDM optical transmission system and controlling method thereof |
| JP2019211590A (ja) * | 2018-06-04 | 2019-12-12 | 富士通株式会社 | ラマン光増幅器及びラマン光増幅方法 |
| JP7077794B2 (ja) | 2018-06-04 | 2022-05-31 | 富士通株式会社 | ラマン光増幅器及びラマン光増幅方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1229381A1 (en) | 2002-08-07 |
| EP1229381A4 (en) | 2005-11-30 |
| US20020041431A1 (en) | 2002-04-11 |
| US6462861B2 (en) | 2002-10-08 |
| JP4565794B2 (ja) | 2010-10-20 |
| JPWO2002021203A1 (ja) | 2004-01-15 |
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