CN104953451A - Far-end pumping erbium-doped optical fiber amplifier - Google Patents
Far-end pumping erbium-doped optical fiber amplifier Download PDFInfo
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- CN104953451A CN104953451A CN201510412173.9A CN201510412173A CN104953451A CN 104953451 A CN104953451 A CN 104953451A CN 201510412173 A CN201510412173 A CN 201510412173A CN 104953451 A CN104953451 A CN 104953451A
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Abstract
The invention provides a far-end pumping erbium-doped optical fiber amplifier. The amplifier comprises a pump light source and an erbium-doped optical fiber amplifier body which are connected through a pump transmission optical fiber, wherein the pump light source is a high-power laser with a wavelength being 1390nm, one end of the pump transmission optical fiber is connected with the pump light source through a high-reflectivity fiber bragg grating with a wavelength being 1480nm, and the other end of the pump transmission optical fiber is connected with the erbium-doped optical fiber amplifier body through a low-reflectivity fiber bragg grating with a wavelength being 1480nm. A laser resonance cavity is formed by the fiber bragg grating pair, and high-efficiency frequency shift from laser with the wavelength being 1390nm to laser with the wavelength being 1480nm is realized. The far-end pumping erbium-doped optical fiber amplifier overcomes the defect of low Raman frequency shifting efficiency in 1390nm laser transmission, sufficient 1480nm pump laser can be obtained after longer optical fiber transmission, the power of 1480nm pump laser obtained through the optical fiber amplifier is increased by more than 3dB than that of the 1480nm pump laser obtained in a traditional manner; with the adoption of the far-end pumping erbium-doped optical fiber amplifier, a larger signal gain can be obtained under the condition of the same distance, or a further pump transmission distance can be realized under the condition of the same signal gain.
Description
Technical field
The present invention relates to a kind of fiber amplifier, be specifically related to a kind of far-end pump erbium-doped optical fiber amplifier for optical fiber telecommunications system.
Background technology
Far-end pump erbium-doped optical fiber amplifier (being called for short pump image intensifer far away) is the main Repeater optical amplifiers of optical fiber telecommunications system, its pump light source is placed in the machine room of transmitter or receiver, by optical fiber, pump light is transferred to erbium-doped fiber amplifier and carry out pumping, there is the feature of relay point without the need to power supply.Conventional pump image intensifer far away adopts 1480nm high power laser pumping or the pumping of 1390nm high power laser.1480nm high power laser transmitting procedure in a fiber except because of Optical Fiber Transmission loss, reduce except its luminous power, the impact of stimulated Raman scattering is also subject to when transmission range is far away, make near most of power transfer of pumping laser to 1570nm wavelength, seriously reduce 1480nm laser transmission efficiency, the pump power causing erbium-doped fiber amplifier to obtain is not enough, and image intensifer is difficult to export larger signal gain.1390nm high power laser be then make use of laser in a fiber long-distance transmissions time the feature that can be affected by stimulated Raman scattering, 1390nm laser power is transferred near 1480nm wavelength by the effect of stimulated Raman scattering, to meet the requirement of erbium-doped fiber amplifier absorption spectrum.But stimulated Raman scattering is transmitted in both directions, therefore the laser power transformation efficiency of the Raman frequency shift of stimulated Raman scattering generation is low, and Raman frequency shift spectral bandwidth is larger, wherein the available laser power of erbium-doped fiber amplifier is also little, therefore 1390nm laser is not high as the efficiency of the pumping source of pump image intensifer far away, can not meet the requirement of erbium-doped fiber amplifier to pump power.
Summary of the invention
The object of this invention is to provide a kind of far-end pump erbium-doped optical fiber amplifier, pump light source is 1390nm high power laser, the fiber grating of a 1480nm is respectively added at pump transmission optical fiber two ends, fiber grating pair forms laserresonator, make 1390nm frequency displacement to 1480nm, laser shift efficiency improves, and 1480nm laser spectroscopy more meets the requirement of erbium-doped fiber amplifier absorption spectrum.
A kind of far-end pump erbium-doped optical fiber amplifier of the present invention's design, comprise the pump light source through pump transmission Fiber connection and erbium-doped fiber amplifier, pump light source is 1390nm high power laser, one, one end high reflectance 1480nm fiber grating of pump transmission optical fiber connects pump light source, and the other end of pump transmission optical fiber connects erbium-doped fiber amplifier through an antiradar reflectivity 1480nm fiber grating.
Fiber grating pair formed laserresonator, make whole pumping laser transmission link form a 1480nm Raman fiber lasers, make 1390nm laser expeditiously frequency displacement to 1480nm laser.
Described 1390nm high power laser is the laser that monomode fiber exports.
Pump transmission optical fiber between described high reflectance 1480nm fiber grating and antiradar reflectivity 1480nm fiber grating is general single mode fiber or ultra-low-loss fiber, and fiber lengths is 50km ~ 150km.
Centered by described high reflectance 1480nm bragg grating wavelength be 1480nm, the reflectivity bragg grating that is greater than 90%, centered by preferred version, wavelength is the bragg grating of 1480nm, reflectivity 99%.
Centered by described antiradar reflectivity 1480nm bragg grating, wavelength is 1480nm, reflectivity is less than 20%, is greater than the bragg grating of 5%.
Described erbium-doped fiber amplifier is 1480nm laser pumping type erbium-doped fiber amplifier.
Described antiradar reflectivity 1480nm fiber grating is connected with erbium-doped fiber amplifier through the pump transmission optical fiber of another section 0 ~ 100km.Pump transmission optical fiber total length between pump light source and erbium-doped fiber amplifier is less than or equal to 150km.
Compared with prior art, the beneficial effect of a kind of far-end of the present invention pump erbium-doped optical fiber amplifier is: 1, overcome the shortcoming that in 1390nm laser transmission, Raman frequency shift efficiency is not high, also can obtain enough 1480nm pumping lasers through up to a hundred kilometers transmit compared with long optical fibers, the 1480nm pump laser power that image intensifer of the present invention obtains on average improves more than 3dB than traditional 1390nm pump mode; In same distance situation, image intensifer of the present invention can obtain larger signal gain; Or under same signal gain, the present invention has farther pump transmission distance.
Accompanying drawing explanation
Fig. 1 is this far-end pump erbium-doped optical fiber amplifier embodiment 1 structural representation;
Fig. 2 is this far-end pump erbium-doped optical fiber amplifier embodiment 2 structural representation;
Embodiment
Embodiment 1
As shown in Figure 1, this routine pump light source is the high power laser that 1390nm monomode fiber exports to this far-end pump erbium-doped optical fiber amplifier embodiment 1 structure, and pump transmission optical fiber is general single mode fiber, and fiber lengths is 100km.In one end through add a centre wavelength be 1480nm, reflectivity be 99% the bragg grating connection pump light source of pump transmission optical fiber near pump light source.Pump transmission optical fiber near the other end of erbium-doped fiber amplifier add through centre wavelength be 1480nm, reflectivity be 10% bragg grating connect erbium-doped fiber amplifier.This routine erbium-doped fiber amplifier is 1480nm laser pumping type single-stage erbium-doped fiber amplifier.
This routine optical sender is connected with erbium-doped fiber amplifier through the signal transmission fiber of 100km.This routine signal transmission fiber take general single mode fiber as medium.The light signal s laser power that optical sender exports is 0dBm, the 2W pumping laser that dump power-20dBm, pump light source 1390nm high power laser exports after the transmission of 100km signal transmission fiber produces 8dB gain at erbium-doped fiber amplifier after 100km pump transmission optical fiber.Light signal S after this routine fiber amplifier amplifies outputs to next stage Transmission Fibers.
Embodiment 2
This far-end pump erbium-doped optical fiber amplifier embodiment 2 structure as shown in Figure 2, wherein the structure of the 1480nm fiber grating of pump light source, pump transmission optical fiber, high reflectance and the 1480nm fiber grating of antiradar reflectivity is identical with embodiment 1, and difference is that this routine pump transmission optical fiber is ultra-low-loss fiber.Pump light source 1390nm high power laser connects one end of one section of 70km pump transmission optical fiber through high reflectance 1480nm fiber grating, this section of pump transmission optical fiber other end connects antiradar reflectivity 1480nm fiber grating, afterwards again through the 70km pump transmission Fiber connection erbium-doped fiber amplifier of another section; The light signal s that this routine optical sender exports directly inputs erbium-doped fiber amplifier, and the signal transmission fiber that the output of erbium-doped fiber amplifier is medium through the ultra-low-loss fiber of 140km is connected with optical receiver.
Above-described embodiment, be only the specific case further described object of the present invention, technical scheme and beneficial effect, the present invention is not defined in this.All make within scope of disclosure of the present invention any amendment, equivalent replacement, improvement etc., be all included within protection scope of the present invention.
Claims (8)
1. a far-end pump erbium-doped optical fiber amplifier, comprises the pump light source through pump transmission Fiber connection and erbium-doped fiber amplifier, and pump light source is 1390nm high power laser, it is characterized in that:
One, one end high reflectance 1480nm fiber grating of described pump transmission optical fiber connects pump light source, and the other end of pump transmission optical fiber connects erbium-doped fiber amplifier through an antiradar reflectivity 1480nm fiber grating.
2. far-end pump erbium-doped optical fiber amplifier according to claim 1, is characterized in that:
Described 1390nm high power laser is the laser that monomode fiber exports.
3. far-end pump erbium-doped optical fiber amplifier according to claim 1, is characterized in that:
Described pump transmission optical fiber is general single mode fiber or ultra-low-loss fiber, and fiber lengths is 50km ~ 150km.
4. far-end pump erbium-doped optical fiber amplifier according to claim 1, is characterized in that:
Centered by described high reflectance 1480nm bragg grating wavelength be 1480nm, the reflectivity bragg grating that is greater than 90%.
5. far-end pump erbium-doped optical fiber amplifier according to claim 1, is characterized in that:
Centered by described high reflectance 1480nm bragg grating, wavelength is 1480nm, reflectivity is the bragg grating of 99%.
6. far-end pump erbium-doped optical fiber amplifier according to claim 1, is characterized in that:
Centered by described antiradar reflectivity 1480nm bragg grating, wavelength is 1480nm, reflectivity is less than 20%, is greater than the bragg grating of 5%.
7. far-end pump erbium-doped optical fiber amplifier according to claim 1, is characterized in that:
Described erbium-doped fiber amplifier is 1480nm laser pumping type erbium-doped fiber amplifier.
8. far-end pump erbium-doped optical fiber amplifier according to claim 1, is characterized in that:
Described antiradar reflectivity 1480nm fiber grating is connected with erbium-doped fiber amplifier through the pump transmission optical fiber of another section 0 ~ 100km; Pump transmission optical fiber total length between pump light source and erbium-doped fiber amplifier is less than or equal to 150km, and the pump transmission optical fiber total length between pump light source and erbium-doped fiber amplifier is less than or equal to 150km.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510412173.9A CN104953451A (en) | 2015-07-15 | 2015-07-15 | Far-end pumping erbium-doped optical fiber amplifier |
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| CN201510412173.9A CN104953451A (en) | 2015-07-15 | 2015-07-15 | Far-end pumping erbium-doped optical fiber amplifier |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846293A (en) * | 2016-05-20 | 2016-08-10 | 苏州领创激光科技有限公司 | Laser for laser cutting machine |
| CN105846294A (en) * | 2016-05-20 | 2016-08-10 | 苏州领创激光科技有限公司 | Laser capable of monitoring cutting state in real time |
| CN106067654A (en) * | 2016-07-22 | 2016-11-02 | 中国电子科技集团公司第三十四研究所 | A kind of far-end pump erbium-doped optical fiber amplifier based on 1950nm laser instrument |
| CN106532419A (en) * | 2016-11-29 | 2017-03-22 | 中国电子科技集团公司第三十四研究所 | Far-end pumped erbium-doped fiber amplifier of fiber Raman laser |
| CN106911394A (en) * | 2017-04-10 | 2017-06-30 | 中国电子科技集团公司第三十四研究所 | A kind of faint light remote-pumped amplifier based on double 1480nm lasers |
| CN112345060A (en) * | 2020-09-22 | 2021-02-09 | 上海波汇科技有限公司 | DAS system based on far pump amplifier |
| CN112490830A (en) * | 2020-11-16 | 2021-03-12 | 武汉光迅电子技术有限公司 | Remote pumping system for increasing distance between pumping unit and gain unit |
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| US5991070A (en) * | 1997-11-14 | 1999-11-23 | Sdl, Inc. | Optical amplifier with oscillating pump energy |
| US20120033293A1 (en) * | 2010-08-03 | 2012-02-09 | Red-C Optical Networks Ltd. | Method and apparatus of detecting an opening in an optical transmission fiber of a ropa system |
| CN204793602U (en) * | 2015-07-15 | 2015-11-18 | 中国电子科技集团公司第三十四研究所 | Distal end pumping erbium doped fiber amplifier |
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2015
- 2015-07-15 CN CN201510412173.9A patent/CN104953451A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5991070A (en) * | 1997-11-14 | 1999-11-23 | Sdl, Inc. | Optical amplifier with oscillating pump energy |
| US20120033293A1 (en) * | 2010-08-03 | 2012-02-09 | Red-C Optical Networks Ltd. | Method and apparatus of detecting an opening in an optical transmission fiber of a ropa system |
| CN204793602U (en) * | 2015-07-15 | 2015-11-18 | 中国电子科技集团公司第三十四研究所 | Distal end pumping erbium doped fiber amplifier |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105846293A (en) * | 2016-05-20 | 2016-08-10 | 苏州领创激光科技有限公司 | Laser for laser cutting machine |
| CN105846294A (en) * | 2016-05-20 | 2016-08-10 | 苏州领创激光科技有限公司 | Laser capable of monitoring cutting state in real time |
| CN106067654A (en) * | 2016-07-22 | 2016-11-02 | 中国电子科技集团公司第三十四研究所 | A kind of far-end pump erbium-doped optical fiber amplifier based on 1950nm laser instrument |
| CN106532419A (en) * | 2016-11-29 | 2017-03-22 | 中国电子科技集团公司第三十四研究所 | Far-end pumped erbium-doped fiber amplifier of fiber Raman laser |
| CN106911394A (en) * | 2017-04-10 | 2017-06-30 | 中国电子科技集团公司第三十四研究所 | A kind of faint light remote-pumped amplifier based on double 1480nm lasers |
| CN112345060A (en) * | 2020-09-22 | 2021-02-09 | 上海波汇科技有限公司 | DAS system based on far pump amplifier |
| CN112345060B (en) * | 2020-09-22 | 2022-10-11 | 上海波汇科技有限公司 | DAS system based on far pump amplifier |
| CN112490830A (en) * | 2020-11-16 | 2021-03-12 | 武汉光迅电子技术有限公司 | Remote pumping system for increasing distance between pumping unit and gain unit |
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Application publication date: 20150930 |