DE69722291D1 - Optisches nachrichtensystem - Google Patents
Optisches nachrichtensystemInfo
- Publication number
- DE69722291D1 DE69722291D1 DE69722291T DE69722291T DE69722291D1 DE 69722291 D1 DE69722291 D1 DE 69722291D1 DE 69722291 T DE69722291 T DE 69722291T DE 69722291 T DE69722291 T DE 69722291T DE 69722291 D1 DE69722291 D1 DE 69722291D1
- Authority
- DE
- Germany
- Prior art keywords
- message system
- optical message
- optical
- message
- 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
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
- H04B10/294—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
- 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
- H01S3/13—Stabilisation of laser output parameters, e.g. frequency or amplitude
- H01S3/131—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation
- H01S3/1312—Stabilisation of laser output parameters, e.g. frequency or amplitude by controlling the active medium, e.g. by controlling the processes or apparatus for excitation by controlling the optical pumping
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP05065496A JP3556379B2 (ja) | 1996-03-07 | 1996-03-07 | 光伝送システム |
JP5065496 | 1996-03-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69722291D1 true DE69722291D1 (de) | 2003-07-03 |
DE69722291T2 DE69722291T2 (de) | 2004-04-01 |
Family
ID=12864945
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69722291T Expired - Fee Related DE69722291T2 (de) | 1996-03-07 | 1997-03-07 | Optisches nachrichtensystem |
Country Status (4)
Country | Link |
---|---|
US (2) | US6344914B1 (de) |
EP (1) | EP0794599B1 (de) |
JP (1) | JP3556379B2 (de) |
DE (1) | DE69722291T2 (de) |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3556379B2 (ja) * | 1996-03-07 | 2004-08-18 | 富士通株式会社 | 光伝送システム |
JPH10285113A (ja) * | 1997-04-07 | 1998-10-23 | Kokusai Denshin Denwa Co Ltd <Kdd> | 利得等化装置及び光増幅伝送路 |
DE69836670T2 (de) * | 1997-10-28 | 2007-10-04 | Nec Corp. | Optischer Ein-/Ausfügemultiplexer |
JP3111964B2 (ja) | 1998-01-28 | 2000-11-27 | 日本電気株式会社 | 光利得等化装置及び方法 |
US6496300B2 (en) * | 1998-02-27 | 2002-12-17 | Fujitsu Limited | Optical amplifier |
FR2776152A1 (fr) * | 1998-03-16 | 1999-09-17 | Alsthom Cge Alcatel | Controle a distance de l'excursion de gain dans un systeme de transmission a fibre optique et a multiplexage de longueur d'ondes |
JP2000004061A (ja) | 1998-06-15 | 2000-01-07 | Nec Corp | 光利得等化装置 |
EP1033794A4 (de) * | 1998-07-07 | 2002-10-02 | Furukawa Electric Co Ltd | Optischer verstärkunsentzerrer sowie optischer verstärker und optischer wellenlängenmultiplexsender, die beide den optischen verstärkungsentzerrer enthalten |
AUPP617198A0 (en) * | 1998-09-25 | 1998-10-22 | University Of Sydney, The | High q optical microwave processor using hybrid delay-line filters |
JP2000106544A (ja) | 1998-09-28 | 2000-04-11 | Fujitsu Ltd | 光増幅器及び波長多重光伝送システム |
JP3745560B2 (ja) * | 1998-11-05 | 2006-02-15 | 日本電信電話株式会社 | 波長等化装置制御方法 |
US6321000B1 (en) | 1998-12-01 | 2001-11-20 | Nortel Networks Limited | Optical equalizer |
GB9827602D0 (en) * | 1998-12-15 | 1999-02-10 | Northern Telecom Ltd | Optical equaliser |
KR20000051028A (ko) * | 1999-01-18 | 2000-08-16 | 윤종용 | 광 필터 및 이를 이용한 광채널 감시 장치 및 방법 |
US6384964B1 (en) | 1999-01-27 | 2002-05-07 | The Furukawa Electric Co., Ltd. | Optical gain equalizer, and method for producing the optical gain equalizer, and applications of the optical gain equalizer |
CA2266195C (en) * | 1999-03-19 | 2004-12-21 | Itf Optical Technologies Inc.-Technologies Optiques Itf Inc. | Optical clean-up filters and method of making the same |
JP4340355B2 (ja) * | 1999-07-06 | 2009-10-07 | 株式会社日立コミュニケーションテクノロジー | 波長利得特性シフトフィルタ、光伝送装置および光伝送方法 |
US6275328B1 (en) | 1999-07-27 | 2001-08-14 | Nortel Networks Limited | Amplifier control |
US6347006B1 (en) | 1999-12-29 | 2002-02-12 | Nortel Networks Limited | Control for periodic optical filter |
JP2001255423A (ja) | 2000-03-13 | 2001-09-21 | Furukawa Electric Co Ltd:The | 光部品 |
JP2002050816A (ja) * | 2000-08-02 | 2002-02-15 | Fujitsu Ltd | 光増幅器 |
DE10040790B4 (de) * | 2000-08-21 | 2004-03-04 | Siemens Ag | Regelverfahren und optische Datenübertragungsstrecke mit einer Vorrichtung zur Kompensation von Änderungen des SRS-bedingten Leistungsaustausches |
WO2002019572A1 (fr) * | 2000-08-31 | 2002-03-07 | Fujitsu Limited | Procede de demarrage d'un systeme de communication optique, procede d'agrandissement/de reduction de canaux, et support enregistre lisible par un ordinateur |
US6751012B1 (en) * | 2000-12-14 | 2004-06-15 | Tyco Telecommunications (Us) Inc. | Method and apparatus for measuring noise figure in optical amplifiers |
US7006279B2 (en) * | 2001-02-16 | 2006-02-28 | Ec-Optics Technology Inc. | Optical harmonic equalization control systems and methods |
US20020131159A1 (en) * | 2001-03-16 | 2002-09-19 | Jun Ye | Dynamic spectral filters with internal control |
US6529316B1 (en) * | 2001-05-03 | 2003-03-04 | Onetta, Inc. | Optical network equipment with optical channel monitor and dynamic spectral filter alarms |
US6941079B1 (en) * | 2001-05-24 | 2005-09-06 | Cisco Technology, Inc. | Optical demultiplexer with multi-channel power control and tilt compensation |
JP4665344B2 (ja) * | 2001-06-04 | 2011-04-06 | 株式会社日立製作所 | 波長間レベル偏差や光sn偏差を補償する光伝送装置 |
JP4686906B2 (ja) * | 2001-06-04 | 2011-05-25 | 株式会社日立製作所 | 波長多重用光伝送装置 |
EP1280288A1 (de) * | 2001-07-27 | 2003-01-29 | Alcatel | Verfahren und Vorrichtung zum automatischen Verstärkungsausgleich in einem optischen Übertragungssystem |
US20030067670A1 (en) * | 2001-10-04 | 2003-04-10 | Lacra Pavel | Dynamic optical spectral control scheme for optical amplifier sites |
US20030133651A1 (en) * | 2002-01-16 | 2003-07-17 | Teraphase Technologies, Inc. | Filtering noise in optical signal transmission |
AU2003235979A1 (en) * | 2002-05-09 | 2003-11-11 | Nikon Corporation | Optical filter module and light amplifier using the module |
US7801446B2 (en) * | 2002-06-14 | 2010-09-21 | Infinera Corporation | Wavelength division multiplexed optical communication system with rapidly-tunable optical filters |
AU2003275648A1 (en) * | 2002-10-25 | 2004-05-13 | The Furukawa Electric Co., Ltd. | Dynamic gain equalizer |
JP3974018B2 (ja) | 2002-11-13 | 2007-09-12 | 富士通株式会社 | 可変光フィルタおよびそれを用いた光伝送システム、並びに、可変光フィルタの制御方法 |
US7006280B2 (en) * | 2002-12-17 | 2006-02-28 | Jds Uniphase Corporation | Multi-stage filtered optical amplifier |
US8014541B1 (en) * | 2004-10-08 | 2011-09-06 | Kind of Loud Technologies, LLC. | Method and system for audio filtering |
US7904519B2 (en) * | 2006-02-21 | 2011-03-08 | Alcatel-Lucent Usa Inc. | Method for switching between embedded communications and external communications |
US9337923B2 (en) * | 2011-10-18 | 2016-05-10 | Nec Corporation | Optical spectral shaping for nonlinearity enhancement in high speed digital coherent optical transmissions |
US20170373656A1 (en) * | 2015-02-19 | 2017-12-28 | Dolby Laboratories Licensing Corporation | Loudspeaker-room equalization with perceptual correction of spectral dips |
US10274681B1 (en) * | 2017-12-22 | 2019-04-30 | Inphi Corporation | Optical equalizer for photonics system |
EP3767843A4 (de) * | 2018-03-16 | 2021-05-19 | NEC Corporation | Variabler entzerrer und verfahren zur steuerung eines variablen entzerrers |
US11764875B2 (en) * | 2020-11-06 | 2023-09-19 | Subcom, Llc | Gain equalization error management in optical communication systems |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62276154A (ja) * | 1986-05-26 | 1987-12-01 | 松下電工株式会社 | 屋根葺き構造 |
IT1237136B (it) | 1989-10-30 | 1993-05-24 | Pirelli Cavi Spa | Amplificatore ottico a fibra attiva a larga banda di lunghezza d'onda di segnale. |
US5005175A (en) | 1989-11-27 | 1991-04-02 | At&T Bell Laboratories | Erbium-doped fiber amplifier |
JP2591529B2 (ja) | 1990-10-19 | 1997-03-19 | 富士通株式会社 | 希土類ドープファイバ及びそのプリフォームの製造方法 |
JP2947983B2 (ja) | 1991-07-18 | 1999-09-13 | 富士通株式会社 | 光ファイバ増幅器 |
JPH0563259A (ja) | 1991-09-03 | 1993-03-12 | Sumitomo Electric Ind Ltd | 光フアイバ増幅器 |
EP1156606A3 (de) | 1991-10-21 | 2004-02-04 | Nec Corporation | Optisches Übertragungssystem |
US5225922A (en) * | 1991-11-21 | 1993-07-06 | At&T Bell Laboratories | Optical transmission system equalizer |
JPH05226759A (ja) | 1992-02-10 | 1993-09-03 | Sumitomo Electric Ind Ltd | 光測定用光源 |
CA2137082C (en) | 1992-06-01 | 2001-04-17 | Stephen Anthony Cassidy | Filter with preselected attenuation/wavelength characteristic |
JPH06276154A (ja) | 1993-03-19 | 1994-09-30 | Nippon Telegr & Teleph Corp <Ntt> | 光利得等化回路 |
JP2846212B2 (ja) | 1993-04-21 | 1999-01-13 | 国際電信電話株式会社 | 監視信号受信方法及び装置 |
JP2751789B2 (ja) * | 1993-07-14 | 1998-05-18 | 日本電気株式会社 | 光ファイバ増幅器 |
US5365362A (en) * | 1993-09-10 | 1994-11-15 | At&T Bell Laboratories | Ultra-high capacity non-soliton optical transmission using optical phase conjugation |
US5406404A (en) * | 1993-11-02 | 1995-04-11 | At&T Corp. | Method of mitigating gain peaking using a chain of fiber amplifiers |
JP3263889B2 (ja) | 1994-11-25 | 2002-03-11 | ソニー株式会社 | 量子化方法及びその装置、高能率符号化装置、記録再生装置並びに情報伝送システム |
US5541766A (en) * | 1994-11-30 | 1996-07-30 | At&T Corp. | Gain control for optically amplified systems |
US5530584A (en) * | 1994-12-16 | 1996-06-25 | National Research Council Of Canada | Control of gain and dispersion of a signal in an optical medium |
US5696615A (en) * | 1995-11-13 | 1997-12-09 | Ciena Corporation | Wavelength division multiplexed optical communication systems employing uniform gain optical amplifiers |
CA2163061C (en) | 1995-11-16 | 2002-01-08 | Yves Painchaud | Method for spatially controlling the period and amplitude of bragg filters |
JP3556379B2 (ja) * | 1996-03-07 | 2004-08-18 | 富士通株式会社 | 光伝送システム |
DE69932231T2 (de) | 1998-01-29 | 2007-06-28 | Asahi Kasei Kogyo K.K. | Glatte polyesterfaser |
-
1996
- 1996-03-07 JP JP05065496A patent/JP3556379B2/ja not_active Expired - Fee Related
-
1997
- 1997-02-26 US US08/805,825 patent/US6344914B1/en not_active Expired - Lifetime
- 1997-03-07 EP EP97103864A patent/EP0794599B1/de not_active Expired - Lifetime
- 1997-03-07 DE DE69722291T patent/DE69722291T2/de not_active Expired - Fee Related
-
2001
- 2001-09-24 US US09/960,403 patent/US6807376B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US6807376B2 (en) | 2004-10-19 |
EP0794599A3 (de) | 1999-05-12 |
US20020033995A1 (en) | 2002-03-21 |
DE69722291T2 (de) | 2004-04-01 |
EP0794599A2 (de) | 1997-09-10 |
JPH09244079A (ja) | 1997-09-19 |
JP3556379B2 (ja) | 2004-08-18 |
US6344914B1 (en) | 2002-02-05 |
EP0794599B1 (de) | 2003-05-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |