CN103606806A - Distributed fiber Raman amplifier - Google Patents
Distributed fiber Raman amplifier Download PDFInfo
- Publication number
- CN103606806A CN103606806A CN201310585545.9A CN201310585545A CN103606806A CN 103606806 A CN103606806 A CN 103606806A CN 201310585545 A CN201310585545 A CN 201310585545A CN 103606806 A CN103606806 A CN 103606806A
- Authority
- CN
- China
- Prior art keywords
- transmission fibers
- optical fiber
- division multiplexer
- raman amplifier
- raman
- 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.)
- Pending
Links
Images
Landscapes
- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
Abstract
The invention relates to a distributed fiber Raman amplifier. A light signal enters a transmission fiber through a fiber isolator, a tail end of the transmission fiber is connected with an input end of a wavelength division multiplexer, a pump signal input end of the wavelength division multiplexer is connected with a Raman pump laser device. Output of a signal public end of the wavelength division multiplexer is output of the distributed fiber Raman amplifier, and an amplified light signal is outputted. The transmission fiber of the distributed fiber Raman amplifier is inserted with one or two saturable absorbers for inhibiting Rayleigh noise. The absorber can be a semiconductor saturable absorber or a carbon nanotube saturable absorber. Length of the transmission fiber divided into two segments is about one half of a total length when one saturable absorber is inserted, length of the transmission fiber divided into three segments is about one third of the total length when two saturable absorbers are inserted. The distributed fiber Raman amplifier can further be a bidirectional pump distributed fiber Raman amplifier. The distributed fiber Raman amplifier effectively inhibits gain of the Rayleigh noise, realizes Raman amplification with high gain and low noise and improves an all-optical relay distance of fiber communication.
Description
Technical field
The present invention relates to a kind of fiber amplifier, be specifically related to be applied to a kind of distributed optical fiber Raman amplifier that optical fiber communication relaying amplifies.
Background technology
Distributed optical fiber Raman amplifier has low-down noise factor, in optic communication links, use the Optical Signal To Noise Ratio (OSNR) of distributed optical fiber Raman amplifier than using the high 4dB～5dB of erbium-doped fiber amplifier (EDFA), therefore can greatly extend maximum without electric regenerative repeating transmission range, or be more applicable for the optical signal repeater amplification of higher rate.Yet, when the turn off gain of fiber Raman amplifier is higher, backward pair of rayleigh scattering noise of raman amplifier (DRB, after be called for short rayleigh noise) level can surpass spontaneous emission noise (ASE) level, become Main Noise Sources, have a strong impact on signal of communication quality.
Summary of the invention
In order to overcome current distributed optical fiber Raman amplifier excessive shortcoming of rayleigh noise under high turn off gain state, the invention provides a kind of distributed optical fiber Raman amplifier that can suppress rayleigh noise.
The designed distributed optical fiber Raman amplifier of the present invention comprises fibre optic isolater, Raman pump laser, wavelength division multiplexer and Transmission Fibers, operation wavelength and the power output of described fibre optic isolater and fiber amplifier match, light signal enters Transmission Fibers after fibre optic isolater, Transmission Fibers end connects the input of wavelength division multiplexer, and the pump signal input of wavelength division multiplexer connects Raman pump laser.Wavelength division multiplexer is by the light signal coupling of the raman pump light of Raman pump laser and Transmission Fibers, light signal obtains Raman and amplifies in transmitting procedure, wavelength division multiplexer signal common port is output as the output of this distributed optical fiber Raman amplifier, the light signal that output is amplified.In the Transmission Fibers of this distributed optical fiber Raman amplifier, insert 1 or 2 saturable absorber.
Saturable absorber is novel optical device, and it is very little and very large to low power noise signal insertion loss to high power light signal insertion loss.Therefore, the rayleigh noise that power level is lower sees through the saturable absorber inserting in Transmission Fibers with very large loss, and raman pump light and flashlight see through this saturable absorber with very little loss, weaken the cumulative power of the once backward Rayleigh scattering producing in optical signal transmission process, also having weakened with the secondary rayleigh scattering noise of light signal symport is backward pair of rayleigh scattering noise.
In the Transmission Fibers of distributed optical fiber Raman amplifier, insert 1 saturable absorber, Transmission Fibers is divided into 2 sections by this saturable absorber, and the length of every section is 40%～60% of Transmission Fibers total length.
In the Transmission Fibers of distributed optical fiber Raman amplifier, insert 2 saturable absorbers, Transmission Fibers is divided into 3 sections by 2 saturable absorbers, and the length of every section of Transmission Fibers is 25%～35% of Transmission Fibers total length.
Preferred version is: in the Transmission Fibers of distributed optical fiber Raman amplifier, insert 1 saturable absorber, Transmission Fibers is divided into 2 sections of Transmission Fibers equal in length by this saturable absorber.
In the Transmission Fibers of distributed optical fiber Raman amplifier, insert 2 saturable absorbers, Transmission Fibers is divided into 3 sections of Transmission Fibers equal in length by these 2 saturable absorbers.
Described saturable absorber is semiconductor saturable absorber, or carbon nano-tube saturable absorber.
Described distributed optical fiber Raman amplifier is the distributed optical fiber Raman amplifier of backward pump, and Transmission Fibers end connects wavelength division multiplexer and Raman pump laser.
Described distributed optical fiber Raman amplifier can be also the distributed optical fiber Raman amplifier of two directional pump, and Transmission Fibers front end connects forward wave division multiplexer and forward direction Raman pump laser, and Transmission Fibers end connects wavelength division multiplexer and Raman pump laser.Light signal enters the input of forward wave division multiplexer after fibre optic isolater, forward direction Raman pump laser output connects the pump signal input of wavelength division multiplexer, its pumping laser enters forward wave division multiplexer, the common port of forward wave division multiplexer connects Transmission Fibers front end, forward wave division multiplexer coupling raman pump light and light signal enter Transmission Fibers jointly, and light signal obtains Raman simultaneously and amplifies in transmitting procedure; At middle insertion 1 or 2 saturable absorbers of Transmission Fibers, suppress rayleigh noise; Transmission Fibers end connects the input of wavelength division multiplexer, and the pump signal input of wavelength division multiplexer connects Raman pump laser output, and wavelength division multiplexer common port is output as the output of this distributed optical fiber Raman amplifier.
Described Raman pump laser is any in the semiconductor Raman pump laser of fibre optic Raman laser, single semiconductor Raman pump laser and branched polarization coupling, or the Raman pump laser of the semiconductor Raman pump laser wavelength division multiplexing of branched different wave length.
Described Transmission Fibers be meet ITU-T G.652～G.655 in the monomode fiber of any standard, or dispersion compensating fiber (DCF) or highly nonlinear optical fiber.ITU-T is the telecommunication standardsization tissue (ITU-T for ITU Telecommunication Standardization Sector) of International Telecommunications Union.
Compared with prior art, the beneficial effect of distributed optical fiber Raman amplifier of the present invention is: overcome the shortcoming that distributed optical fiber Raman amplifier rayleigh noise power under high turn off gain is excessive, have a strong impact on quality of optical fiber communication, high-gain, low noise Raman amplification effect have been realized, be conducive to optical fiber communication and realize longer full optic relay distance, also contribute to effective transmission of superelevation rate optical communication to amplify.
Accompanying drawing explanation
Fig. 1 is the distributed optical fiber Raman amplifier structural representation of this distributed optical fiber Raman amplifier embodiment 1 backward pumping.
Fig. 2 is the distributed optical fiber Raman amplifier structural representation of this distributed optical fiber Raman amplifier embodiment 2 two directional pumps.
Embodiment
Distributed optical fiber Raman amplifier embodiment 1
This distributed optical fiber Raman amplifier embodiment 1 as shown in Figure 1, distributed optical fiber Raman amplifier for backward pump, light signal enters Transmission Fibers after fibre optic isolater, Transmission Fibers end connects the input of wavelength division multiplexer, and the pump signal input of wavelength division multiplexer connects the output of Raman pump laser.At 1 saturable absorber of middle insertion of Transmission Fibers, the Transmission Fibers that connects fibre optic isolater and wavelength division multiplexer is divided into 2 sections of Transmission Fibers equal in length by this saturable absorber.Wavelength division multiplexer common port is the output of this distributed optical fiber Raman amplifier, can connect telecommunication optical fiber.
Operation wavelength and the power output of described fibre optic isolater and fiber amplifier match.
This routine saturable absorber is semiconductor saturable absorber.
This routine Raman pump laser is fibre optic Raman laser,
This routine Transmission Fibers is to meet the G.652 telecommunication optical fiber of standard of ITU-T.
Distributed optical fiber Raman amplifier embodiment 2
This distributed optical fiber Raman amplifier embodiment 2 as shown in Figure 2, distributed optical fiber Raman amplifier for two directional pump, light signal enters the input of forward wave division multiplexer after fibre optic isolater, forward direction Raman pump laser output connects the pump signal input of forward wave division multiplexer, its pumping laser enters forward wave division multiplexer, the common port of forward wave division multiplexer connects Transmission Fibers front end, forward wave division multiplexer coupling raman pump light and light signal enter Transmission Fibers jointly, and light signal obtains Raman simultaneously and amplifies in transmitting procedure; In Transmission Fibers, inserted saturable absorber 1 and saturable absorber 2, Transmission Fibers is divided into equal in length 3 sections by these 2 saturable absorbers: Transmission Fibers 1, Transmission Fibers 2 and Transmission Fibers 3.Transmission Fibers end connects the input of wavelength division multiplexer, and the pump signal input of wavelength division multiplexer connects Raman pump laser output, and wavelength division multiplexer common port is output as the output of this distributed optical fiber Raman amplifier.
Operation wavelength and the power output of described fibre optic isolater and fiber amplifier match.
This routine saturable absorber is carbon nano-tube saturable absorber.
This routine Raman pump laser is single semiconductor Raman pump laser.
This routine Transmission Fibers is to meet the G.655 telecommunication optical fiber of standard of ITU-T.
Above-described embodiment, is only the specific case that object of the present invention, technical scheme and beneficial effect are further described, and the present invention is not defined in this.All any modifications of making, be equal to replacement, improvement etc., within being all included in protection scope of the present invention within scope of disclosure of the present invention.
Claims (7)
1. a distributed optical fiber Raman amplifier, comprise fibre optic isolater, Raman pump laser, wavelength division multiplexer and Transmission Fibers, operation wavelength and the power output of described fibre optic isolater and fiber amplifier match, light signal enters Transmission Fibers after fibre optic isolater, Transmission Fibers end connects the input of wavelength division multiplexer, and the pump signal input of wavelength division multiplexer connects Raman pump laser; Wavelength division multiplexer common port is output as the output of distributed optical fiber Raman amplifier, it is characterized in that:
In described Transmission Fibers, insert 1 or 2 saturable absorber.
2. distributed optical fiber Raman amplifier according to claim 1, is characterized in that:
In described Transmission Fibers, insert 1 saturable absorber, Transmission Fibers is divided into 2 sections by this saturable absorber, and the length of every section is 40%～60% of Transmission Fibers total length;
Or, in described Transmission Fibers, insert 2 saturable absorbers, Transmission Fibers is divided into 3 sections by 2 saturable absorbers, and the length of every section of Transmission Fibers is 25%～35% of Transmission Fibers total length.
3. distributed optical fiber Raman amplifier according to claim 1, is characterized in that:
In described Transmission Fibers, insert 1 saturable absorber, Transmission Fibers is divided into 2 sections of Transmission Fibers equal in length by this saturable absorber;
Or, in described Transmission Fibers, insert 2 saturable absorbers, Transmission Fibers is divided into 3 sections of Transmission Fibers equal in length by these 2 saturable absorbers.
4. according to the distributed optical fiber Raman amplifier described in any one in claims 1 to 3, it is characterized in that:
Described saturable absorber is semiconductor saturable absorber, or carbon nano-tube saturable absorber.
5. according to the distributed optical fiber Raman amplifier described in any one in claims 1 to 3, it is characterized in that:
Described distributed optical fiber Raman amplifier is the distributed optical fiber Raman amplifier of two directional pump, and Transmission Fibers front end connects forward wave division multiplexer and forward direction Raman pump laser, and Transmission Fibers end connects wavelength division multiplexer and Raman pump laser; Light signal enters the input of forward wave division multiplexer after fibre optic isolater, forward direction Raman pump laser output connects the pump signal input of wavelength division multiplexer, its pumping laser enters forward wave division multiplexer, and the common port of forward wave division multiplexer connects Transmission Fibers front end.
6. according to the distributed optical fiber Raman amplifier described in any one in claims 1 to 3, it is characterized in that:
Described Raman pump laser is any in the semiconductor Raman pump laser of fibre optic Raman laser, single semiconductor Raman pump laser and branched polarization coupling, or the Raman pump laser of the semiconductor Raman pump laser wavelength division multiplexing of branched different wave length.
7. according to the distributed optical fiber Raman amplifier described in any one in claims 1 to 3, it is characterized in that:
Described Transmission Fibers be meet ITU-T G.652～G.655 in the monomode fiber of any standard, or dispersion compensating fiber or highly nonlinear optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310585545.9A CN103606806A (en) | 2013-11-20 | 2013-11-20 | Distributed fiber Raman amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310585545.9A CN103606806A (en) | 2013-11-20 | 2013-11-20 | Distributed fiber Raman amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103606806A true CN103606806A (en) | 2014-02-26 |
Family
ID=50125018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310585545.9A Pending CN103606806A (en) | 2013-11-20 | 2013-11-20 | Distributed fiber Raman amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103606806A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884093A (en) * | 2016-09-30 | 2018-04-06 | 天津市誉航润铭科技发展有限公司 | A kind of fibre optical sensor relays amplification module |
| CN107884092A (en) * | 2016-09-30 | 2018-04-06 | 天津市誉航润铭科技发展有限公司 | A kind of distributed fiberoptic sensor relays amplification module |
| CN109525320A (en) * | 2019-01-04 | 2019-03-26 | 电子科技大学 | A kind of full optic relay device based on regeneration Raman technology |
| CN111740304A (en) * | 2020-07-06 | 2020-10-02 | 中国科学院国家天文台长春人造卫星观测站 | Saturable absorber system, preparation method and laser pulse equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5532861A (en) * | 1993-07-06 | 1996-07-02 | France Telecom | Optical fiber transmission system with compensation for line distortions |
| US20050129382A1 (en) * | 2002-02-25 | 2005-06-16 | Youichi Sakakibara | Signal light noise reduciton apparatus and signal light noise reduction method |
| WO2009119585A1 (en) * | 2008-03-24 | 2009-10-01 | オリンパス株式会社 | Pulse light source device |
| CN203850612U (en) * | 2013-11-20 | 2014-09-24 | 中国电子科技集团公司第三十四研究所 | Distributed fiber Raman amplifier |
-
2013
- 2013-11-20 CN CN201310585545.9A patent/CN103606806A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5532861A (en) * | 1993-07-06 | 1996-07-02 | France Telecom | Optical fiber transmission system with compensation for line distortions |
| US20050129382A1 (en) * | 2002-02-25 | 2005-06-16 | Youichi Sakakibara | Signal light noise reduciton apparatus and signal light noise reduction method |
| WO2009119585A1 (en) * | 2008-03-24 | 2009-10-01 | オリンパス株式会社 | Pulse light source device |
| CN203850612U (en) * | 2013-11-20 | 2014-09-24 | 中国电子科技集团公司第三十四研究所 | Distributed fiber Raman amplifier |
Non-Patent Citations (1)
| Title |
|---|
| 田志磊: "长跨距无中继系统中光纤拉曼放大器的设计与分析", 《中国优秀硕士学位论文全文数据库信息科技辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884093A (en) * | 2016-09-30 | 2018-04-06 | 天津市誉航润铭科技发展有限公司 | A kind of fibre optical sensor relays amplification module |
| CN107884092A (en) * | 2016-09-30 | 2018-04-06 | 天津市誉航润铭科技发展有限公司 | A kind of distributed fiberoptic sensor relays amplification module |
| CN109525320A (en) * | 2019-01-04 | 2019-03-26 | 电子科技大学 | A kind of full optic relay device based on regeneration Raman technology |
| CN111740304A (en) * | 2020-07-06 | 2020-10-02 | 中国科学院国家天文台长春人造卫星观测站 | Saturable absorber system, preparation method and laser pulse equipment |
| CN111740304B (en) * | 2020-07-06 | 2021-05-11 | 中国科学院国家天文台长春人造卫星观测站 | Saturable absorber system, preparation method and laser pulse equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203850612U (en) | Distributed fiber Raman amplifier | |
| Xia et al. | 557-km unrepeatered 100G transmission with commercial raman DWDM system, enhanced ROPA, and cabled large A eff ultra-low loss fiber in OSP environment | |
| CN106961305B (en) | Bypass forward Raman amplification relay-free optical fiber transmission system | |
| US20230059478A1 (en) | Amplified hollow core fiber transmission | |
| CN107181529A (en) | A kind of multi-wavelength repeatless transmission system | |
| CN103606806A (en) | Distributed fiber Raman amplifier | |
| JP6312927B2 (en) | Optical repeater and optical fiber communication system | |
| Chang et al. | 8× 120 Gb/s transmission over 80.8 dB/480.4 km unrepeatered span | |
| Tsuchida et al. | Amplification characteristics of a multi-core erbium-doped fiber amplifier | |
| CN206850773U (en) | A kind of no-repeater optical fiber transmission system for bypassing positive Raman amplifiction | |
| CN102280803A (en) | Pulse fiber amplifier | |
| KR100421140B1 (en) | Raman optical fiber amplifier using erbium doped fiber | |
| CN106067654B (en) | 1950nm laser-based far-end pumping erbium-doped optical fiber amplifier | |
| CN214313856U (en) | Bidirectional optical amplifier of single-core bidirectional communication system | |
| CN210668978U (en) | Low-noise erbium-doped optical fiber amplifier optical path structure | |
| Chang et al. | 15 Tb/s unrepeatered transmission over 409.6 km using distributed raman amplification and ROPA | |
| CN207010684U (en) | Repeatless transmission system with compound shared pumping source | |
| JP2006294819A (en) | Component for optical amplification, optical amplifier, and optical communication system | |
| CN107171729B (en) | Relay-free transmission system with composite common pump source | |
| CN207010683U (en) | A kind of repeatless transmission system with compound shared pumping source | |
| Bissessur | State of the art in non repeatered optical transmission | |
| CN116960714B (en) | Optical fiber amplifier | |
| CN209844967U (en) | Hybrid amplifier | |
| Chang et al. | Advanced technologies for unrepeatered transmission systems and their applications | |
| CN217427317U (en) | Bidirectional dispersion compensation type Raman optical fiber amplifier |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140226 |