WO2002091048A1 - Dispositif de connexion d'une source lumineuse de pompage d'un amplificateur a fibre a plusieurs etages a dopage er - Google Patents

Dispositif de connexion d'une source lumineuse de pompage d'un amplificateur a fibre a plusieurs etages a dopage er Download PDF

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Publication number
WO2002091048A1
WO2002091048A1 PCT/CN2001/000569 CN0100569W WO02091048A1 WO 2002091048 A1 WO2002091048 A1 WO 2002091048A1 CN 0100569 W CN0100569 W CN 0100569W WO 02091048 A1 WO02091048 A1 WO 02091048A1
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WO
WIPO (PCT)
Prior art keywords
pump
light source
output
erbium
coupler
Prior art date
Application number
PCT/CN2001/000569
Other languages
English (en)
Chinese (zh)
Inventor
Meiyu Zou
Original Assignee
Huawei Technologies Co., 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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to PCT/CN2001/000569 priority Critical patent/WO2002091048A1/fr
Publication of WO2002091048A1 publication Critical patent/WO2002091048A1/fr

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Classifications

    • 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

Definitions

  • the present invention relates to the field of electrical telecommunications, and specifically belongs to an access device for erbium-doped fiber amplification pump optical erbium in optical transmission. Background technique
  • a repeater In long-distance optical fiber communication, when the optical signal is transmitted a certain distance, a repeater is added to amplify the weakened optical signal and then continue to transmit.
  • the traditional repeater first converts a weak light signal into an electric signal, and after shaping and amplifying the electric signal, then converts the electric signal into a strong light signal and sends it out.
  • Such repeater equipment is complex and has low reliability, which is quite difficult for long-distance submarine optical fiber communications.
  • An optical amplifier is used to directly amplify the optical signal, the optical-electrical-optical conversion process can be omitted, and the relay equipment can be simplified.
  • An erbium-doped fiber amplifier hereinafter referred to as EDFA is a type of optical amplifier.
  • FIG. 2 shows only the structure of the erbium-doped fiber amplification part.
  • the signal light is amplified by the erbium-doped fiber 603, 703, 903, and 113 in order, and then output by the optical isolator 12.
  • WDM wavelength division multiplexer 6
  • the demultiplexers 601, 701, 901, 111 and the signal light perform a meeting wave, and then output to the corresponding erbium-doped optical fiber to achieve amplification of the signal light.
  • An optical isolator 8 was added before the wavelength division multiplexer 901, its role is to prevent the reversed radiated light from damaging the pump laser-602, 702,
  • the optical fibers 603, 703, invert the number of particles and reduce the gain.
  • the purpose of the present invention is to provide a pump light source access device for cascaded EDFAs.
  • this device-for gain control it is relatively convenient to achieve the purpose of gain control by changing fewer pump light sources, while not Affects the shape of the gain curve.
  • the cascaded erbium-doped fiber amplified pump light source access device includes at least two pump lasers, and the output pump light is connected to the erbium-doped fiber by wavelength division multiplexing. And combining the signal light with the signal light, which is characterized in that the pump light source access device further includes a coupler, and the pump light output by the pump laser is first coupled through the coupler and then output to the wavelength division multiplexer.
  • the coupler is a 2 * 2 coupler, and its output power ratio is 1: 1.
  • N the number of cascaded erbium-doped fibers
  • Nl the number of pump lasers used as the pump source
  • the pump light source is cross-coupled before being connected to the erbium-doped fiber, so that the multiple pump light sources form a whole instead of being independent of each other. Adjusting the power of one of the pump light sources will affect the benefits of all or multiple erbium-doped fibers in a fixed proportion, so it will not or reduce the adverse effect on the flatness of the output gain spectrum. When performing gain control, reduce The difficulty of gain flat control.
  • Figure 1 is a schematic diagram of the trout fiber amplification
  • FIG. 2 is a structure diagram of a pump light source access structure of a cascade erbium-doped fiber in the prior art
  • FIG. 3 is a structural diagram of a pump light source access according to an embodiment of the present invention.
  • FIG. 4 is a structural diagram of a pump light source access according to another embodiment of the present invention. The best embodiment of the present invention
  • the principle of signal light amplification by erbium-doped fiber is shown in Figure 1.
  • the signal light passes through the splitter. 1, a small part
  • the split light is split and sent to the detector 401 for input signal light monitoring.
  • Most of the light passes through the splitter 1 and then enters the optical isolator 201 of the erbium-doped fiber amplifier 2 and is separated from the pump light output by the pump light source 205.
  • WDM wavelength division multiplexer
  • the signal optical port from WDM 202 is connected to the erbium-doped fiber 203 for amplification.
  • the amplified light is then optically isolated.
  • the optical splitter 1 and the optical splitter 3 can output the input signal light to different ports according to a certain ratio.
  • the functions of the optical isolators 201 and 204 are to prevent the reflected light from oscillating back and forth in the optical path.
  • FIG. 2 is an access structure diagram of a pump light source in the prior art, which has been described above.
  • the cascaded erbium-doped fiber-amplified pump light source access device includes at least a pump laser, and also includes a coupler.
  • the pump light output by the pump laser is first coupled through the coupler, and then output to The wavelength division multiplexer multiplexes with the signal light.
  • the erbium optical fiber amplifier of this embodiment is formed by cascading four segments of erbium optical fiber 142, 152, 172, and 182, and each segment of erbium-doped optical fiber has one WDM.
  • the signal light passes through the optical isolator 13 and is combined with the pump light output from the first output end Outl of the pump light source device 21 at the first WDM 141 and then output to the first erbium-doped fiber 142 for the first amplification. .
  • the amplified signal light will be output to the second WDM 151, and the pump output from the second output terminal Out2 of the pump light source device 21 Puguang mixes, and then performs the second amplification in the second stage of exotic optical fiber 152.
  • the second amplified signal light passes through the third WDM 171 and the third stage.
  • the optical fiber 172, the fourth WDM 181, and the fourth erbium-doped optical fiber 182 are respectively mixed and amplified with the pump light output from the third and fourth output terminals Out3 and Out4 of the pump light source device 21, and then output through the optical isolator 19.
  • the function of the isolator 16 is also to prevent the reverse excitation radiation from affecting the amplification gain.
  • the pump light source device pair of this embodiment includes four pump lasers (LD) 214, 215, 216, 217, and three 2 * 2 couplers 211, 212, and 213.
  • the pump light output by the pump laser 215 and the pump laser 216 is input from the two input ends of the coupler 21.3, and the coupler 213 redistributes the input pump light intensity at the two output ends.
  • three The output intensity ratio of the coupler is 1: 1.
  • the two output ends of the coupler 213 are respectively connected to the input ends of the coupler 211 and the coupler 212, and are respectively coupled to the pump light of the pump laser 214 and the pump laser 217.
  • the coupler 211 couples the pump light output from the pump laser 214 and the coupler 213, and then averages the output to the two outputs.
  • the output end is the two output ends Ontl, Out2 of the pump light source 21; the coupler 212 couples the pump light output from the pump laser 217 and the coupler 213, and then averages from the pump light to the source device.
  • the pump light source device shown in FIG. 3 is used. When adjusting the large gain, it is only necessary to change the output power of the pump laser 215 or the pump laser 216. At this time, the four outputs of the pump light source device are adjusted. The output powers of the Outl, Out2, Out3, and Out4 terminals change synchronously, and the gains of the four segments of erbium-doped fiber also change synchronously, so the shape of the entire gain curve of the erbium-doped fiber will not be affected.
  • a four-segment erbium-doped fiber cascade amplifier which uses a pump light source access device that is coupled by four pump lasers through three couplers, and the power output ratio of each coupler is 1. : 1.
  • the protection scope of the present invention is not limited to this, and the pump light source can be appropriately adjusted according to needs.
  • a pump light source device 31 as shown in FIG. 4 can be used.
  • the device includes three pump lasers 313, 314, 315, and two couplers 311, 312.
  • the pump light outputted from the output ends Outl, Out2, and Out3 is used as a pump light source of three erbium-doped fiber.
  • the output power ratio of the coupler is not limited to 1: 1, and can be set to other ratios, such as 1: 1.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Optics & Photonics (AREA)
  • Lasers (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un dispositif de connexion d'une source de pompage d'un amplificateur à fibre à plusieurs étages à dopage Er, comprenant deux sources lumineuses de pompage. Avant d'entrer dans l'amplificateur, les sources lumineuses de pompage sont couplées par un coupleur de manière que la lumière de sortie de ladite source soit redistribuée à la sortie du coupleur. Toutes les sources lumineuses sont intégrées. Le réglage de la puissance d'un des sources influence le gain de toutes ou plusieurs fibres à dopage Er selon des proportions déterminées, sans que cela ne génère ou ne réduise l'influence nocive sur la planéité de la courbe de gain de sortie, tout en lissant les difficultés liées à la surveillance de la planéité.
PCT/CN2001/000569 2001-04-20 2001-04-20 Dispositif de connexion d'une source lumineuse de pompage d'un amplificateur a fibre a plusieurs etages a dopage er WO2002091048A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2001/000569 WO2002091048A1 (fr) 2001-04-20 2001-04-20 Dispositif de connexion d'une source lumineuse de pompage d'un amplificateur a fibre a plusieurs etages a dopage er

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2001/000569 WO2002091048A1 (fr) 2001-04-20 2001-04-20 Dispositif de connexion d'une source lumineuse de pompage d'un amplificateur a fibre a plusieurs etages a dopage er

Publications (1)

Publication Number Publication Date
WO2002091048A1 true WO2002091048A1 (fr) 2002-11-14

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107681425A (zh) * 2017-11-10 2018-02-09 珠海光恒科技有限公司 一种泵浦光源及其构成的光纤放大器
CN116053912A (zh) * 2023-03-17 2023-05-02 上海拜安实业有限公司 具有高度集成化的双级mopa光纤激光器

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2740879A1 (fr) * 1995-11-06 1997-05-09 Univ Toulon & Du Var Lab Coupleur laser-fibre optique pour laser de puissance
CN1240031A (zh) * 1996-12-06 1999-12-29 德国电信股份有限公司 使固体激光器与光波导管形成光耦合的装置及其制造方法
US6026206A (en) * 1998-03-06 2000-02-15 Lucent Technologies, Inc. Optical coupler using anamorphic microlens

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2740879A1 (fr) * 1995-11-06 1997-05-09 Univ Toulon & Du Var Lab Coupleur laser-fibre optique pour laser de puissance
CN1240031A (zh) * 1996-12-06 1999-12-29 德国电信股份有限公司 使固体激光器与光波导管形成光耦合的装置及其制造方法
US6026206A (en) * 1998-03-06 2000-02-15 Lucent Technologies, Inc. Optical coupler using anamorphic microlens

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107681425A (zh) * 2017-11-10 2018-02-09 珠海光恒科技有限公司 一种泵浦光源及其构成的光纤放大器
CN116053912A (zh) * 2023-03-17 2023-05-02 上海拜安实业有限公司 具有高度集成化的双级mopa光纤激光器
CN116053912B (zh) * 2023-03-17 2024-01-26 上海拜安实业有限公司 具有高度集成化的双级mopa光纤激光器

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