CA2303092C - Optical amplifier with actively controlled spectral gain and fiber light source with desired output spectrum - Google Patents
Optical amplifier with actively controlled spectral gain and fiber light source with desired output spectrum Download PDFInfo
- Publication number
- CA2303092C CA2303092C CA002303092A CA2303092A CA2303092C CA 2303092 C CA2303092 C CA 2303092C CA 002303092 A CA002303092 A CA 002303092A CA 2303092 A CA2303092 A CA 2303092A CA 2303092 C CA2303092 C CA 2303092C
- Authority
- CA
- Canada
- Prior art keywords
- optical
- gain
- wavelength
- filter
- optical amplifier
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 178
- 239000000835 fiber Substances 0.000 title claims abstract description 39
- 230000003595 spectral effect Effects 0.000 title claims description 8
- 238000001228 spectrum Methods 0.000 title abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 12
- 230000002269 spontaneous effect Effects 0.000 claims abstract description 12
- 229910052691 Erbium Inorganic materials 0.000 claims abstract description 8
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000013307 optical fiber Substances 0.000 claims description 45
- 238000005086 pumping Methods 0.000 claims description 24
- 238000001069 Raman spectroscopy Methods 0.000 claims description 10
- 238000005253 cladding Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 5
- 230000001939 inductive effect Effects 0.000 claims description 3
- 230000009022 nonlinear effect Effects 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims 1
- 238000000295 emission spectrum Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 claims 1
- 229910052761 rare earth metal Inorganic materials 0.000 claims 1
- -1 rare-earth ions Chemical class 0.000 claims 1
- 238000004891 communication Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract 2
- 230000005540 biological transmission Effects 0.000 description 8
- 238000010168 coupling process Methods 0.000 description 8
- 238000005859 coupling reaction Methods 0.000 description 8
- 102100027004 Inhibin beta A chain Human genes 0.000 description 6
- 238000009738 saturating Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
-
- 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
- H01S3/06795—Fibre lasers with superfluorescent emission, e.g. amplified spontaneous emission sources for fibre laser gyrometers
-
- 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
- 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
- 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
- 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
- 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
- H01S3/05—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
- H01S3/10007—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
- H01S3/30—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
- 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)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Lasers (AREA)
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
- Optical Communication System (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1998/28259 | 1998-07-14 | ||
| KR1019980028259A KR100328291B1 (ko) | 1998-07-14 | 1998-07-14 | 능동제어된파장별이득을갖는광증폭기및변화가능한출력스펙트럼을갖는광섬유광원 |
| PCT/KR1998/000254 WO2000004613A1 (en) | 1998-07-14 | 1998-08-19 | Optical amplifier with actively controlled spectral gain and fiber light source with desired output spectrum |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2303092A1 CA2303092A1 (en) | 2000-01-27 |
| CA2303092C true CA2303092C (en) | 2005-02-08 |
Family
ID=19544048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002303092A Expired - Fee Related CA2303092C (en) | 1998-07-14 | 1998-08-19 | Optical amplifier with actively controlled spectral gain and fiber light source with desired output spectrum |
Country Status (7)
| Country | Link |
|---|---|
| EP (2) | EP2037548A3 (enExample) |
| JP (1) | JP2002520888A (enExample) |
| KR (1) | KR100328291B1 (enExample) |
| CN (1) | CN100392927C (enExample) |
| CA (1) | CA2303092C (enExample) |
| DE (1) | DE69840103D1 (enExample) |
| WO (1) | WO2000004613A1 (enExample) |
Families Citing this family (48)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6728026B2 (en) | 1998-07-14 | 2004-04-27 | Novera Optics, Inc. | Dynamically tunable optical amplifier and fiber optic light source |
| US6898367B2 (en) | 2000-06-17 | 2005-05-24 | Leica Microsystems Heidelberg Gmbh | Method and instrument for microscopy |
| DE20122782U1 (de) | 2000-06-17 | 2007-11-15 | Leica Microsystems Cms Gmbh | Beleuchtungseinrichtung |
| EP1164406B1 (de) * | 2000-06-17 | 2019-04-17 | Leica Microsystems CMS GmbH | Verfahren und Vorrichtung zur Beleuchtung eines Objekts |
| DE20122783U1 (de) | 2000-06-17 | 2007-11-15 | Leica Microsystems Cms Gmbh | Anordnung zum Untersuchen mikroskopischer Präparate mit einem Scanmikroskop und Beleuchtungseinrichtung für ein Scanmikroskop |
| DE10115589B4 (de) | 2000-06-17 | 2020-07-30 | Leica Microsystems Cms Gmbh | Konfokales Scanmikroskop |
| WO2002007272A2 (en) * | 2000-07-17 | 2002-01-24 | Optigain, Inc. | Control system for fiber laser or amplifier |
| US6504989B1 (en) | 2000-10-23 | 2003-01-07 | Onetta, Inc. | Optical equipment and methods for manufacturing optical communications equipment for networks |
| US6498677B1 (en) | 2000-10-23 | 2002-12-24 | Onetta, Inc. | Optical amplifier systems with transient control |
| KR100380217B1 (ko) * | 2000-12-08 | 2003-04-16 | 한국과학기술원 | 파장분할다중방식 광전송시스템을 위한 광증폭기의 조정방법 |
| US6633430B1 (en) | 2001-02-15 | 2003-10-14 | Onetta, Inc. | Booster amplifier with spectral control for optical communications systems |
| US6438010B1 (en) | 2001-03-02 | 2002-08-20 | Onetta, Inc. | Drive circuits for microelectromechanical systems devices |
| US6731424B1 (en) | 2001-03-15 | 2004-05-04 | Onetta, Inc. | Dynamic gain flattening in an optical communication system |
| WO2002080318A1 (en) * | 2001-03-31 | 2002-10-10 | Corning Incorporated | Noise-compensating gain controller for an optical amplifier |
| US6734954B2 (en) * | 2001-04-04 | 2004-05-11 | Nortel Networks Limited | Method and system for automatic Raman gain control |
| US6529316B1 (en) | 2001-05-03 | 2003-03-04 | Onetta, Inc. | Optical network equipment with optical channel monitor and dynamic spectral filter alarms |
| US6545800B1 (en) | 2001-06-05 | 2003-04-08 | Onetta, Inc. | Depolarizers for optical channel monitors |
| US6483631B1 (en) | 2001-06-05 | 2002-11-19 | Onetta, Inc. | Optical amplifier spectral tilt controllers |
| FR2827099A1 (fr) * | 2001-07-05 | 2003-01-10 | Cit Alcatel | Systeme de transmission a fibre optique a amplification par diffusion raman stimulee |
| DE10137158B4 (de) * | 2001-07-30 | 2005-08-04 | Leica Microsystems Heidelberg Gmbh | Verfahren zur Scanmikroskopie und Scanmikroskop |
| GB0124258D0 (en) * | 2001-10-09 | 2001-11-28 | Marconi Comm Ltd | Optical amplifier control in WDM communications systems |
| JP3903768B2 (ja) * | 2001-10-31 | 2007-04-11 | 日本電気株式会社 | 光ファイバ伝送システムとラマン利得制御装置、及びラマン利得制御方法 |
| EP1349242A1 (en) * | 2002-03-27 | 2003-10-01 | Alcatel | Raman fiber amplification stage; optical system and method to control the raman amplification stage |
| KR20030089278A (ko) * | 2002-05-17 | 2003-11-21 | (주)엠디케이 | 파장 분할 다중화 시스템용 다단 광섬유 증폭기 |
| JP2006108499A (ja) * | 2004-10-07 | 2006-04-20 | Furukawa Electric Co Ltd:The | 光信号増幅装置及びロススペクトルの決定方法。 |
| EP1675283B1 (en) * | 2004-12-23 | 2007-04-18 | Alcatel Lucent | Method of controlling the gain of a raman amplifier |
| KR100725224B1 (ko) * | 2005-05-04 | 2007-06-04 | 재단법인서울대학교산학협력재단 | 광섬유라만증폭기의 이득고정방법 및 이득고정기 |
| EP1876737A1 (en) * | 2006-07-06 | 2008-01-09 | Alcatel Lucent | A controlled optical amplifier device and its corresponding feed back control method |
| US7924497B2 (en) * | 2006-09-21 | 2011-04-12 | Tyco Electronics Subsea Communications Llc | System and method for gain equalization and optical communication system incorporating the same |
| JP5476576B2 (ja) * | 2007-03-12 | 2014-04-23 | 独立行政法人情報通信研究機構 | バーストモードエルビウム添加ファイバ増幅器 |
| CN101719800B (zh) * | 2008-10-09 | 2013-10-30 | 昂纳信息技术（深圳）有限公司 | 一种提高放大器中信号功率和噪声功率比值的方法和装置 |
| US8908265B2 (en) * | 2009-09-04 | 2014-12-09 | Xieon Networks S.A.R.L. | Optical fiber amplifier comprising an embedded filter and a control method with improved feedforward control performance |
| KR101276338B1 (ko) | 2009-12-18 | 2013-06-18 | 한국전자통신연구원 | 파장 가변 광원 |
| JP5625415B2 (ja) * | 2010-03-19 | 2014-11-19 | 富士通株式会社 | 光増幅装置，利得制御方法，光伝送装置および利得制御装置 |
| JP5716300B2 (ja) * | 2010-06-30 | 2015-05-13 | 富士通株式会社 | 光伝送システム |
| JP5884654B2 (ja) * | 2012-06-12 | 2016-03-15 | 富士通株式会社 | 光増幅器及び光増幅器制御方法 |
| CN103067092A (zh) * | 2012-12-28 | 2013-04-24 | 华为技术有限公司 | 多波长光源装置 |
| US9042007B1 (en) * | 2014-07-22 | 2015-05-26 | Oplink Communications, Inc. | Optical amplifier |
| CN104300360B (zh) * | 2014-10-16 | 2018-04-20 | 浙江大学 | 一种改善超辐射发光二极管光源波长稳定性的装置和方法 |
| CN104466681B (zh) * | 2014-11-25 | 2018-12-25 | 武汉光迅科技股份有限公司 | 一种光纤放大器的串级控制系统 |
| US9766483B2 (en) | 2016-01-21 | 2017-09-19 | Sumitomo Electric Industries, Ltd. | Optical transceiver implementing erbium doped fiber amplifier |
| US11329444B2 (en) | 2016-09-20 | 2022-05-10 | Nec Corporation | Optical amplifier and control method therefor |
| CN108206448A (zh) * | 2016-12-19 | 2018-06-26 | 南京理工大学 | 高功率光纤激光的选择性多通道输出系统及其控制方法 |
| WO2019169642A1 (zh) * | 2018-03-09 | 2019-09-12 | 华为技术有限公司 | 光纤放大器及光纤放大器的增益调节方法 |
| CN110752502B (zh) * | 2019-05-09 | 2021-01-01 | 长春理工大学 | 单纵模与非单纵模双波长激光交替调q输出方法及激光器 |
| CN110752503B (zh) * | 2019-05-09 | 2021-01-01 | 长春理工大学 | 单纵模与非单纵模双脉冲激光交替调q输出方法及激光器 |
| CN112993732B (zh) * | 2019-12-17 | 2023-04-18 | 华为技术有限公司 | 一种光放大装置以及通过光放大装置的信号放大方法 |
| CN119362124A (zh) * | 2024-12-17 | 2025-01-24 | 中国科学院国家授时中心 | 基于单向掺铒光纤放大器的大增益双向放大系统及方法 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT1247845B (it) * | 1991-03-29 | 1995-01-02 | Pirelli Cavi Spa | Linea di telecomunicazione a fibre ottiche con dispositivo di protezione per amplificatori ottici |
| DE59306835D1 (de) * | 1992-09-30 | 1997-08-07 | Siemens Ag | Optische Übertragungseinrichtung für die Übertragung optischer Signale im Wellenlängenmultiplex auf einer Vielzahl benachbarter optischer Trägerwellenlängen |
| KR0146648B1 (ko) * | 1994-06-28 | 1998-08-17 | 양승택 | 다채널 광섬유증폭광원의 채널폭 조절장치 |
| EP0713273B1 (en) * | 1994-11-16 | 2001-04-04 | Oki Electric Industry Company, Limited | Optical fiber amplifier |
| US5457568A (en) * | 1994-11-28 | 1995-10-10 | At&T Corp. | 980 NM pumped erbium fiber amplifier |
| KR0150486B1 (ko) * | 1994-12-07 | 1998-12-01 | 양승택 | 단일 펌프 광원을 이용한 파장가변형 다파장 광섬유 레이저 구도 |
-
1998
- 1998-07-14 KR KR1019980028259A patent/KR100328291B1/ko not_active Expired - Fee Related
- 1998-08-19 CA CA002303092A patent/CA2303092C/en not_active Expired - Fee Related
- 1998-08-19 WO PCT/KR1998/000254 patent/WO2000004613A1/en not_active Ceased
- 1998-08-19 DE DE69840103T patent/DE69840103D1/de not_active Expired - Lifetime
- 1998-08-19 JP JP2000560640A patent/JP2002520888A/ja active Pending
- 1998-08-19 CN CNB988104156A patent/CN100392927C/zh not_active Expired - Fee Related
- 1998-08-19 EP EP08015640A patent/EP2037548A3/en not_active Withdrawn
- 1998-08-19 EP EP98941880A patent/EP1018195B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP1018195B1 (en) | 2008-10-08 |
| KR20000008448A (ko) | 2000-02-07 |
| DE69840103D1 (de) | 2008-11-20 |
| JP2002520888A (ja) | 2002-07-09 |
| CN1276924A (zh) | 2000-12-13 |
| EP2037548A2 (en) | 2009-03-18 |
| WO2000004613A1 (en) | 2000-01-27 |
| KR100328291B1 (ko) | 2002-08-08 |
| CN100392927C (zh) | 2008-06-04 |
| EP1018195A1 (en) | 2000-07-12 |
| EP2037548A3 (en) | 2009-04-15 |
| CA2303092A1 (en) | 2000-01-27 |
Similar Documents
| Publication | Publication Date | Title |
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