CN103698959A - Remote optical pumped amplifier for distributed optical fiber sensing - Google Patents
Remote optical pumped amplifier for distributed optical fiber sensing Download PDFInfo
- Publication number
- CN103698959A CN103698959A CN201210369175.0A CN201210369175A CN103698959A CN 103698959 A CN103698959 A CN 103698959A CN 201210369175 A CN201210369175 A CN 201210369175A CN 103698959 A CN103698959 A CN 103698959A
- Authority
- CN
- China
- Prior art keywords
- division multiplexer
- optical
- optical filter
- connects
- port
- 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 Transform (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Lasers (AREA)
Abstract
The invention discloses a remote optical pumped amplifier for distributed optical fiber sensing. The amplifier comprises a pulse signal light source, a pulsed pump light source, a first wavelength division multiplexer, a front-end sensing optical fiber, a rear-end sensing optical fiber and a passive part, wherein the passive part comprises a first coupler, a first optical isolator, a first erbium-doped optical fiber, a first optical filter, a second erbium-doped optical fiber, a second optical fiber and a first optical loop device; the pulse signal light source and the pulsed pump light source are connected with two ports of the first wavelength division multiplexer respectively; the other port of the first wavelength division multiplexer is connected with the front-end sensing optical fiber; the two ends of the passive part are connected with the front-end sensing optical fiber and the rear-end sensing optical fiber respectively. The amplifier has the advantages that the amplifier structurally comprises the pulsed pump light source and the erbium-doped optical fibers, so that forward optical signals can be amplified, and backward scattered light can also be amplified; the amplifier structurally comprises the filters, so that unnecessary wavelengths can be filtered, light noise is reduced, and the optical fiber detection distance is effectively prolonged.
Description
Technical field
The present invention relates to Distributed Optical Fiber Sensing Techniques field, refer in particular to a kind of distant pump image intensifer for distributing optical fiber sensing.
Background technology
Distribution type optical fiber sensing equipment is based on light backscattering principle, when laser pulse transmits in optical fiber, in optical fiber, can constantly produce the scattered lights such as Raman scattering (Stokes, anti-Stokes), Rayleigh scattering and Brillouin scattering, wherein a part can be transferred to " source " in the other direction, and we claim this part scattered light for " rear orientation light ".
In distribution type optical fiber sensing equipment, scattered signal intensity, along with the increase of detection range is exponential relationship decline, in the situation that not reducing device signal to noise ratio (S/N ratio), has two kinds of methods conventionally, the one, improve light source incident power, the 2nd, improve receiving circuit sensitivity and dynamic range.But improve light source incident power by the nonlinear effect strengthening in optical fiber, after power is higher than certain level, make on the contrary detection range diminish.In addition, the limit has been arrived in the sensitivity of receiver at present, is conventionally difficult to improve.
Summary of the invention
In order to solve problems of the prior art, the invention provides a kind of distant pump image intensifer for distributing optical fiber sensing, when utilizing 0TDR principle to monitor physical parameters such as ambient vibration, stress, by realizing the object that the dual amplification of signal transmission and backscatter signal is reached to extended fiber detection range.
To achieve these goals, the technical solution used in the present invention is: a kind of distant pump image intensifer for distributing optical fiber sensing, comprise pulse signal light source, pulse pump light source, first wave division multiplexer, front end sensing is fine, rear end sensor fibre and passive part, described passive part comprises the first coupling mechanism, the first optoisolator, the first Er-doped fiber, the first optical filter, the second Er-doped fiber, the second optical filter, the first Optical circulator, described pulse signal light source and pulse pump light source are connected respectively two ports of first wave division multiplexer, the another port of first wave division multiplexer connects front end sensor fibre, it is characterized in that: the two ends of described passive part connect respectively front end sensor fibre and rear end sensor fibre.
A port of the first coupling mechanism of described front end sensor fibre connected with passive part, another two ports of the first coupling mechanism connect respectively the first optoisolator and the second optical filter, the first optoisolator connects the first Er-doped fiber, the first Er-doped fiber connects the first optical filter, the first optical filter connects a port of the first Optical circulator, another two ports of the first Optical circulator connect respectively rear end sensor fibre and the second Er-doped fiber, and the second Er-doped fiber connects the second optical filter.
As a preferred embodiment of the present invention, in described passive part, increase Second Wave division multiplexer is set, the 3rd wavelength division multiplexer, the second Optical circulator, the 4th wavelength division multiplexer, the 3rd optical filter, the 4th optical filter and the second optoisolator, described pulse signal light source and pulse pump light source are connected respectively two ports of first wave division multiplexer, the another port of first wave division multiplexer connects front end sensor fibre, front end sensor fibre connects a port of Second Wave division multiplexer, another two ports of Second Wave division multiplexer connect respectively port of the second Optical circulator and a port of the first coupling mechanism, another two ports of the second Optical circulator connect respectively port and the 3rd optical filter of the 3rd wavelength division multiplexer, another two ports of the 3rd wavelength division multiplexer connect respectively a port of the 4th optical filter and the first coupling mechanism, the 4th optical filter connects the first Er-doped fiber, the first Er-doped fiber connects the first optical filter, the first optical filter connects a port of the first Optical circulator, another two ports of the first Optical circulator connect respectively a port of rear end sensor fibre and the 4th wavelength division multiplexer, another two ports of the 4th wavelength division multiplexer connect respectively the 3rd port of the second optoisolator and the first coupling mechanism, the second optoisolator connects the second Er-doped fiber, the second Er-doped fiber connects the 3rd optical filter, the 3rd optical filter connects the second Optical circulator.
Compared with prior art, the invention has the advantages that: first, in structure, adopted pulse pump light source and Er-doped fiber, not only can amplify the light signal of forward direction, can also amplify back-scattering light; Secondly, in structure, use wave filter, can filter out unwanted wavelength, reduced optical noise, effectively extended fiber-optic probe distance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is preferred version structural representation of the present invention.
In figure:
1, pulse signal light source, 2, pulse pump light source, 3, first wave division multiplexer, 4, front end sensor fibre, the 5, first coupling mechanism, 6, the first optoisolator, 7, the first Er-doped fiber, the 8, first optical filter, 9, Second Wave division multiplexer, 10, the second Er-doped fiber, 11, the second optical filter, the 12, first Optical circulator, 13, rear end sensor fibre, 14, the 3rd wavelength division multiplexer, 15, the second Optical circulator, the 16, the 4th wavelength division multiplexer, the 17, the 3rd optical filter, 18, the 4th optical filter, the 19, second optoisolator.
Embodiment
Embodiment mono-:
As shown in Figure 1: a kind of distant pump image intensifer for distributing optical fiber sensing, comprise pulse signal light source 1, pulse pump light source 2, first wave division multiplexer 3, front end sensor fibre 4, rear end sensor fibre 13 and passive part, described passive part comprises the first coupling mechanism 5, the first optoisolator 6, the first Er-doped fiber 7, the first optical filter 8, the second Er-doped fiber 10, the second optical filter 11 and the first Optical circulator 12, described pulse signal 1 and pulse pump light source 2 are connected respectively two ports of first wave division multiplexer 3, the another port of first wave division multiplexer 3 connects front end sensor fibre 4, it is characterized in that: the two ends of described passive part connect respectively front end sensor fibre 4 and rear end sensor fibre 13.
A port of the first coupling mechanism 5 of described front end sensor fibre 4 connected with passive parts, another two ports of the first coupling mechanism 5 connect respectively the first optoisolator 6 and the second optical filter 11, the first optoisolator 6 connects the first Er-doped fiber 7, the first Er-doped fiber 7 connects the first optical filter 8, the first optical filter 8 connects a port of the first Optical circulator 12, another two ports of the first Optical circulator 12 connect respectively rear end sensor fibre 12 and the second Er-doped fiber 10, the second Er-doped fibers 10 connect the second optical filter 11.
The operation of described distant pump image intensifer is as follows: by pulse signal light source 1 output pulse signal light, by pulse pump light source 2 output pump lights, by first wave division multiplexer 3, two-beam is coupled in front end sensor fibre 4, enter again in the first coupling mechanism 5 coupling light is divided into two bundles, wherein a branch of coupling light is entered in the first Er-doped fiber 7 and is amplified by the first optoisolator 6, coupling light after amplification filters out the light of pump light and spontaneous radiation wavelength in coupling light again by the first optical filter 8, the remaining pulse light being exaggerated enters in rear end sensing optic cable 13 by the first Optical circulator 12 again, so far, pulsed optical signals has been realized light amplification.Pulse sense light signal after amplification enters in the second Er-doped fiber 10 through the first Optical circulator 12 at the backscattering light signal along producing in 13 transmission of rear end sensing optic cable, after amplifying, the second Er-doped fiber 10 enters again the second optical filter 11, in the second optical filter 11, filter out the spontaneous emission noise producing in the second Er-doped fiber 10, then back-scattering light enters pulse signal light source 1 along the first coupling mechanism 5, front end sensor fibre 4, first wave division multiplexer 3 respectively again, then processes among entering sensing main frame.Another bundle coupling light being separated by the first coupling mechanism 5 enters in the second Er-doped fiber 10 through the second optical filter 11, is used for the back-scattering light of coming in from rear end sensor fibre 13 to amplify.
Embodiment bis-:
As shown in Figure 2: as a preferred embodiment of the present invention, described pulse signal light source 1 and pulse pump light source 2 are connected respectively two ports of first wave division multiplexer 3, the another port of first wave division multiplexer 3 connects front end sensor fibre 4, front end sensor fibre 4 connects a port of Second Wave division multiplexer 9, another two ports of Second Wave division multiplexer 9 connect respectively port of the second Optical circulator 15 and a port of the first coupling mechanism 5, another two ports of the second Optical circulator 15 connect respectively port and the 3rd optical filter 17 of the 3rd wavelength division multiplexer 14, another two ports of the 3rd wavelength division multiplexer 14 connect respectively a port of the 4th optical filter 18 and the first coupling mechanism 5, the 4th optical filter 18 connects the first Er-doped fiber 7, the first Er-doped fiber 7 connects the first optical filter 8, the first optical filter 8 connects a port of the first Optical circulator 12, another two ports of the first Optical circulator 12 connect respectively a port of rear end sensor fibre 13 and the 4th wavelength division multiplexer 16, another two ports of the 4th wavelength division multiplexer 16 connect respectively the 3rd port of the second optoisolator 19 and the first coupling mechanism 5, the second optoisolator connects 19 and connects the second Er-doped fiber 10, the second Er-doped fiber 10 connects the 3rd optical filter 17, the 3rd optical filter 17 connects the second Optical circulator 15.
The operation of described distant pump image intensifer is as follows: by pulse signal light source 1 output pulse signal light, by long-range pulse pump light source 2 output pulse pump light, by first wave division multiplexer 3, two-beam is coupled in front end sensor fibre 4, coupling light enters Second Wave division multiplexer 9 again, Second Wave division multiplexer 9 is further divided into pulse pump light and pulse light by the coupling light of input, wherein pulse pump light enters the first coupling mechanism 5, the first coupling mechanism 5 is divided into two bundles by pulse pump light, wherein the first beam pulse pump light enters the 3rd wavelength division multiplexer 14, another beam pulse pump light enters the 4th wavelength-division multiplex 16.Pulse light by 9 outputs of Second Wave division multiplexer enters the 3rd wavelength division multiplexer 14 through the second Optical circulator 15, in the 3rd wavelength division multiplexer 14, pulse light mixes with the first beam pulse pump light separating from the first coupling mechanism 5, then the pulse light mixing and pulse pump light enter the first Er-doped fiber 7 through the 4th optical filter 18 and amplify, the mixed pulses flashlight amplifying and pulse pump light are through the first optical filter 8, the first optical filter 8 all filters out the light of the pump light in mixed light and spontaneous radiation wavelength, the pulse light of remaining amplification enters in rear end sensor fibre 13 through the first Optical circulator 12 again, so far, pulsed optical signals has been realized light amplification.Pulsed optical signals after amplification enters the 4th wavelength division multiplexer 16 at the backscattering light signal along producing in rear end sensing optic cable 13 transmitting procedures through the first Optical circulator 12, in the 4th wavelength division multiplexer 16, mix with another beam pulse pump light separating from the first coupling mechanism, mixed light enters 10 pairs of back-scattering lights of the second Er-doped fiber through the second optoisolator 19 again and amplifies.Back-scattering light after amplification again order through the 3rd optical filter 17, the second optical fiber loop device 15, Second Wave division multiplexer 9, front end sensor fibre 4, first wave division multiplexer, 3 transmission enter pulse signal light source 1, then enter sensing main frame and process.
For embodiment mono-, embodiment bis-is by arranging two wave filters, make flashlight only can pass through first Er-doped fiber 7 these roads, thereby avoided the decay 3db because directly enter first wave division multiplexer 5, further increased the flashlight light intensity that enters rear end sensor fibre 13.
Claims (3)
1. the distant pump image intensifer for distributing optical fiber sensing, comprise pulse signal light source, pulse pump light source, first wave division multiplexer, front end sensor fibre, rear end sensor fibre and passive part, described passive part comprises the first coupling mechanism, the first optoisolator, the first Er-doped fiber, the first optical filter, the second Er-doped fiber, the second optical filter, the first Optical circulator, described pulse signal light source and pulse pump light source are connected respectively two ports of first wave division multiplexer, the another port of first wave division multiplexer connects front end sensor fibre, it is characterized in that: the two ends of described passive part connect respectively front end sensor fibre and rear end sensor fibre.
2. a kind of distant pump image intensifer for distributing optical fiber sensing according to claim 1, it is characterized in that: a port of the first coupling mechanism of described front end sensor fibre connected with passive part, another two ports of the first coupling mechanism connect respectively the first optoisolator and the second optical filter, the first optoisolator connects the first Er-doped fiber, the first Er-doped fiber connects the first optical filter, the first optical filter connects a port of the first Optical circulator, another two ports of the first Optical circulator connect respectively rear end sensor fibre and the second Er-doped fiber, the second Er-doped fiber connects the second optical filter.。
3. a kind of on-line monitoring Fencing system based on fiber microbending loss according to claim 1, it is characterized in that: described pulse signal light source and pulse pump light source are connected respectively two ports of first wave division multiplexer, the another port of first wave division multiplexer connects front end sensor fibre, front end sensor fibre connects a port of Second Wave division multiplexer, another two ports of Second Wave division multiplexer connect respectively port of the second Optical circulator and a port of the first coupling mechanism, another two ports of the second Optical circulator connect respectively port and the 3rd optical filter of the 3rd wavelength division multiplexer, another two ports of the 3rd wavelength division multiplexer connect respectively a port of the 4th optical filter and the first coupling mechanism, the 4th optical filter connects the first Er-doped fiber, the first Er-doped fiber connects the first optical filter, the first optical filter connects a port of the first Optical circulator, another two ports of the first Optical circulator connect respectively a port of rear end sensor fibre and the 4th wavelength division multiplexer, another two ports of the 4th wavelength division multiplexer connect respectively the 3rd port of the second optoisolator and the first coupling mechanism, the second optoisolator connects the second Er-doped fiber, the second Er-doped fiber connects the 3rd optical filter, the 3rd optical filter connects the second Optical circulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210369175.0A CN103698959A (en) | 2012-09-27 | 2012-09-27 | Remote optical pumped amplifier for distributed optical fiber sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210369175.0A CN103698959A (en) | 2012-09-27 | 2012-09-27 | Remote optical pumped amplifier for distributed optical fiber sensing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103698959A true CN103698959A (en) | 2014-04-02 |
Family
ID=50360539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210369175.0A Pending CN103698959A (en) | 2012-09-27 | 2012-09-27 | Remote optical pumped amplifier for distributed optical fiber sensing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103698959A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236696A (en) * | 2014-09-01 | 2014-12-24 | 中国石油天然气股份有限公司 | Optical fiber vibration detection method and system based on different-fiber remote pump amplification |
| CN104596633A (en) * | 2014-12-26 | 2015-05-06 | 华中科技大学 | Ultra-long distance distributed optical sensing device and method based on two-way optical amplification |
| CN105258781A (en) * | 2015-09-24 | 2016-01-20 | 中国石油天然气股份有限公司 | Optical fiber vibration detection system and optical fiber vibration detection method |
| 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 |
| CN107085268A (en) * | 2017-06-13 | 2017-08-22 | 苏州艾力光电科技有限公司 | A kind of optically coupled device |
| CN107302172A (en) * | 2016-04-14 | 2017-10-27 | 中国石油天然气集团公司 | A kind of passive image intensifer |
| CN108204858A (en) * | 2016-12-16 | 2018-06-26 | 中国石油天然气股份有限公司 | Vibration signal detection system and detection method |
| CN112033447A (en) * | 2020-09-08 | 2020-12-04 | 东南大学 | Brillouin optical time domain analysis system based on quasi-distributed passive remote pump amplification |
| 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 |
| CN113310565A (en) * | 2021-05-25 | 2021-08-27 | 武汉光迅科技股份有限公司 | Ultra-long distance distributed optical fiber vibration sensing system and method |
| CN114509095A (en) * | 2022-02-22 | 2022-05-17 | 武汉光迅科技股份有限公司 | Sensing system |
| CN116131952A (en) * | 2023-02-16 | 2023-05-16 | 上海欣诺通信技术股份有限公司 | Optical fiber connector and optical amplifying device of optical fiber sensing monitoring system |
-
2012
- 2012-09-27 CN CN201210369175.0A patent/CN103698959A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104236696A (en) * | 2014-09-01 | 2014-12-24 | 中国石油天然气股份有限公司 | Optical fiber vibration detection method and system based on different-fiber remote pump amplification |
| CN104596633A (en) * | 2014-12-26 | 2015-05-06 | 华中科技大学 | Ultra-long distance distributed optical sensing device and method based on two-way optical amplification |
| CN104596633B (en) * | 2014-12-26 | 2018-04-27 | 华中科技大学 | Extra long distance distribution optical sensing means and method based on two-way light amplification |
| CN105258781A (en) * | 2015-09-24 | 2016-01-20 | 中国石油天然气股份有限公司 | Optical fiber vibration detection system and optical fiber vibration detection method |
| CN105258781B (en) * | 2015-09-24 | 2018-11-16 | 中国石油天然气股份有限公司 | Optical fiber vibration detection system and optical fiber vibration detection method |
| CN107302172B (en) * | 2016-04-14 | 2023-09-26 | 中国石油天然气集团公司 | Passive optical amplifier |
| CN107302172A (en) * | 2016-04-14 | 2017-10-27 | 中国石油天然气集团公司 | A kind of passive image intensifer |
| CN108204858A (en) * | 2016-12-16 | 2018-06-26 | 中国石油天然气股份有限公司 | Vibration signal detection system and detection method |
| 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 |
| CN107085268A (en) * | 2017-06-13 | 2017-08-22 | 苏州艾力光电科技有限公司 | A kind of optically coupled device |
| CN112033447B (en) * | 2020-09-08 | 2022-04-22 | 东南大学 | Brillouin optical time domain analysis system based on quasi-distributed passive remote pump amplification |
| CN112033447A (en) * | 2020-09-08 | 2020-12-04 | 东南大学 | Brillouin optical time domain analysis system based on quasi-distributed passive remote pump amplification |
| 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 |
| CN113310565A (en) * | 2021-05-25 | 2021-08-27 | 武汉光迅科技股份有限公司 | Ultra-long distance distributed optical fiber vibration sensing system and method |
| CN113310565B (en) * | 2021-05-25 | 2023-12-01 | 武汉光迅科技股份有限公司 | Ultra-long distance distributed optical fiber vibration sensing system and method |
| CN114509095A (en) * | 2022-02-22 | 2022-05-17 | 武汉光迅科技股份有限公司 | Sensing system |
| CN114509095B (en) * | 2022-02-22 | 2023-12-12 | 武汉光迅科技股份有限公司 | Sensing system |
| CN116131952A (en) * | 2023-02-16 | 2023-05-16 | 上海欣诺通信技术股份有限公司 | Optical fiber connector and optical amplifying device of optical fiber sensing monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103698959A (en) | Remote optical pumped amplifier for distributed optical fiber sensing | |
| CN105136178B (en) | The distribution type optical fiber sensing equipment and method of the relevant domain analysis of chaos Brillouin light | |
| WO2017009606A1 (en) | Improved sensitivity optical fiber sensing systems | |
| CN101762290A (en) | Distributed Raman amplification-based Brillouin optical time domain analysis system | |
| CN106595776B (en) | A kind of more physical quantity sensor-based systems of distribution type fiber-optic and method | |
| CN102538844A (en) | Method and system for improving sensing performance of long-distance Brillouin optical time domain analysis system | |
| CN102706437A (en) | Super-long distance phase-sensitive optical time domain reflectometer (Phi-OTDR) system | |
| CN102072741A (en) | Ultra-long distance distribution type optical fiber sensor and using method thereof | |
| CA2659457A1 (en) | Raman amplification in distributed optical fiber sensing systems | |
| CN101162175A (en) | Ultra-remote distributed fiber raman photons temperature sensor integrated with raman amplifier | |
| CN112038878B (en) | Distributed optical fiber acoustic wave sensing system based on far pump amplifier and Raman amplifier | |
| CN101893802A (en) | Photo-sensing relay amplifier and method thereof | |
| CN105933068A (en) | Bidirectional associated remote pump combined unrepeatered light amplification system | |
| CN201107131Y (en) | Ultra-remote distributed type optical fiber Raman photon temperature sensor integrating Raman amplifier | |
| JPWO2004070342A1 (en) | Optical amplification relay method and optical amplification relay system | |
| CN104269723A (en) | Partitioning type distributed optical fiber signal amplification method | |
| CN201903355U (en) | Super-long distance distributed optical fiber sensing device | |
| CN105322420A (en) | Simple and adjustable multi-wavelength brillouin erbium-doped fiber laser | |
| CN203103754U (en) | Stimulated Raman amplifier for distributed optical fiber vibration sensing system | |
| CN106911394A (en) | A kind of faint light remote-pumped amplifier based on double 1480nm lasers | |
| CN202513934U (en) | Raman fiber amplifier with large gain control range | |
| CN102799044B (en) | Method and device for amplifying signal light of optical time-domain reflectometer of fusion Raman amplifier | |
| CN211121599U (en) | Binary channels optic fibre vibration detecting system | |
| CN112033447B (en) | Brillouin optical time domain analysis system based on quasi-distributed passive remote pump amplification | |
| CN102506915B (en) | Three-order Raman amplification technology-based Brillouin optical time domain analysis system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140402 |