CN201107131Y - Ultra-remote distributed type optical fiber Raman photon temperature sensor integrating Raman amplifier - Google Patents
Ultra-remote distributed type optical fiber Raman photon temperature sensor integrating Raman amplifier Download PDFInfo
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- CN201107131Y CN201107131Y CNU200720191219XU CN200720191219U CN201107131Y CN 201107131 Y CN201107131 Y CN 201107131Y CN U200720191219X U CNU200720191219X U CN U200720191219XU CN 200720191219 U CN200720191219 U CN 200720191219U CN 201107131 Y CN201107131 Y CN 201107131Y
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- raman
- optical fiber
- temperature sensor
- photon temperature
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Abstract
The utility model discloses a super-range distributed fiber Raman photon temperature sensor of an integration Raman magnifier, which comprises a distributed fiber Raman photon temperature sensor, a distributed fiber Raman magnifier and a fiber grating narrow-band reflection filter. The super-range distributed fiber Raman photon temperature sensor adopts the technical proposal that: the distributed fiber Raman magnifier is inserted in the distributed fiber Raman photon temperature sensor; through the gain of the magnifier, the loss of fiber is overcome, the intensity of the spontaneous Raman scattering light in the fiber is intensified, the signal-to-noise performance of a distributed fiber Raman photon temperature sensor system is increased, the transmission distance of the distributed fiber Raman photon temperature sensor is enlarged, and the temperature measurement accuracy is increased. The fiber stimulated Raman scattering effect, the fiber spontaneous Raman scattering effect and the optical time domain reflection principle are smartly utilized in the utility model; the distributed fiber Raman magnifier and the distributed fiber Raman photon temperature sensor technology are combined, thereby realizing the super-range distributed fiber Raman photon temperature sensor.
Description
Technical field
The utility model relates to the very-long-range distributed type optical fiber Raman photon temperature sensor of integrated raman amplifier, belongs to the fiber optic sensor technology field.
Background technology
In distributed fiberoptic sensor, utilize optical fiber spontaneous Raman scattering light intensity to be subjected to the principle of temperature modulation and the distributed type optical fiber Raman photon temperature sensor that the optical time domain reflection principle is formed, have wide application market.Existing distributed optical fiber Raman photon temperature sensor is owing to be subjected to the restriction of system signal noise ratio both at home and abroad, and maximum measuring distance is 30km.The principle that the utility model people once utilized the optical fiber spontaneous Raman scattering to amplify has been improved the signal to noise ratio (S/N ratio) (Zhang Zaixuan of system, Wang Jianfeng, Liu Honglin surplusly waits eastwards, Insoo S.KIM, the experimental study of 30km long-distance distribution optical fiber Raman temperature sensor system, Chinese laser, 2004,31 (5): 613-616.EI (433813429)), maximum measuring distance is 31km, makes moderate progress, but does not have the scope of breakthrough＞30km.
Summary of the invention
The purpose of this utility model is for measurement range that improves the distributed type optical fiber Raman photon temperature sensor and measuring accuracy, and a kind of very-long-range distributed type optical fiber Raman photon temperature sensor of integrated optical fiber raman amplifier is provided.
For achieving the above object, the technical solution that the utility model is taked is to embed distributed optical fiber Raman amplifier in the distributed type optical fiber Raman photon temperature sensor.The very-long-range distributed type optical fiber Raman photon temperature sensor of integrated optical fiber raman amplifier comprises the distributed type optical fiber Raman photon temperature sensor, distributed optical fiber Raman amplifier and 50km single-mode fiber and fiber grating narrowband reflection wave filter, the distributed type optical fiber Raman photon temperature sensor is by semiconductor pulse laser, the 1x2 optical fiber bidirectional coupler, wavelength division multiplexer, the anti Stokes scattering optical filter, Stokes Raman scattering optical filter and two photoelectricity avalanche diodes are formed, and distributed optical fiber Raman amplifier is made up of pumping optical fiber laser instrument and pumping-signal optical fibre coupling mechanism; Semiconductor pulse laser links to each other with the input end of pumping-signal optical fibre coupling mechanism respectively with the pumping optical fiber laser instrument, the output terminal of pumping-signal optical fibre coupling mechanism links to each other with the input end of 1x2 optical fiber bidirectional coupler, an output terminal of 1x2 optical fiber bidirectional coupler links to each other with the 50km single-mode fiber, another output terminal of optical fiber 1x2 bidirectional coupler links to each other with the input end of fiber grating narrowband reflection wave filter, the output terminal of fiber grating narrowband reflection wave filter is connected with the input end of wavelength division multiplexer, the Raman diffused light dorsad of wavelength division multiplexer output is divided into two-way, wherein, one the tunnel is the anti-Stokes Raman diffused light, through the anti Stokes scattering optical filter with convert light signal to electric signal, and the first photoelectricity avalanche diode that amplifies links to each other, another road is the Stokes Raman diffused light, through Stokes Raman scattering optical filter with convert light signal to electric signal, and the second photoelectricity avalanche diode that amplifies links to each other.
Principle of work is as follows:
The laser that semiconductor pulse laser and pumping optical fiber laser instrument produce is input 50km single-mode fiber after pumping-signal optical fibre coupling mechanism and the coupling of 1x2 optical fiber bidirectional coupler, each section of 50km single-mode fiber gone up Rayleigh dorsad (Rayleigh) scattered light of the amplification that produces, Stokes and anti-Stokes Raman (Raman) scattered light are input to fiber grating narrowband reflection wave filter through the 1x2 optical fiber bidirectional coupler dorsad, utilize fiber grating narrowband reflection wave filter to suppress the Rayleigh scattering light dorsad that the pumping optical fiber laser instrument produces in the 50km single-mode fiber, the spontaneous Raman scattering light that allows each section of 50km single-mode fiber go up the amplification that produces simultaneously passes through, and enter into wavelength division multiplexer, to dorsad by wavelength division multiplexer, spontaneous Raman scattering light is divided into two-way, one tunnel anti-Stokes Raman diffused light dorsad, behind anti-Stokes Raman diffused light filter filtering, enter the first photoelectricity avalanche diode, convert electric signal V to
a, and amplify, another road Stokes Raman diffused light dorsad enters the second photoelectricity avalanche diode behind Stokes Raman diffused light filter filtering, convert electric signal V to
s, and amplify.Measure the ratio of the electric signal of two photoelectricity avalanche diode outputs
Ratio from electric signal
With the relation (seeing formula 1) of temperature, can obtain the temperature at each section of optical fiber place, thereby obtain the temperature field distribution T in space.
v
a＝v
0+Δv
v
s＝v
0-Δv
K is a Boltzmann constant in the formula, and h is a Planck's constant, v
aAnd v
sBe respectively the anti-Stokes and the Stokes Raman scattering frequency of each section on the optical fiber, v
0Be the frequency of semiconductor pulse laser, Δ v is the frequency of optical fiber molecular vibration energy level.
On the 50km single-mode fiber each section the spontaneous Raman scattering light intensity be subjected to the modulation of temperature, the temperature difference of each section on the optical fiber, its Raman scattering light intensity is also different, therefore can utilize the spontaneous Raman scattering temperature effect of optical fiber and optical fiber Time Domain Reflectometry (OTDR) principle to make the distributed type optical fiber Raman photon temperature sensor, position by the position of optical fiber Time Domain Reflectometry (OTDR) principle to each section optical fiber.
The beneficial effects of the utility model are:
The utility model adopts and embed distributed optical fiber Raman amplifier in the distributed type optical fiber Raman photon temperature sensor, utilize distributed optical fiber Raman amplifier in optical fiber, to produce the amplification of light, make semiconductor pulse laser in the distributed type optical fiber Raman photon temperature sensor constantly obtain the amplification of distributed optical fiber Raman amplifier, because Amplifier Gain has overcome fibre loss, strengthened spontaneous Raman scattering light intensity in the optical fiber, improved the signal to noise ratio (S/N ratio) of distributed type optical fiber Raman photon temperature sensor system, increase the transmission range of distributed type optical fiber Raman photon temperature sensor, improved measuring distance and temperature measurement accuracy.The utility model has utilized optical fiber stimulated Raman scattering effect and optical fiber spontaneous Raman scattering effect dexterously, with distributed optical fiber Raman amplifier and distributed optical fiber Raman temperature sensor technological incorporation together, realized the very-long-range distributed optical fiber Raman temperature sensor.
Description of drawings
Fig. 1 is the synoptic diagram of very-long-range distributed type optical fiber Raman photon temperature sensor of the present utility model.
Embodiment
With reference to Fig. 1, the very-long-range distributed type optical fiber Raman photon temperature sensor of the integrated raman amplifier of invention, comprise the distributed type optical fiber Raman photon temperature sensor, distributed optical fiber Raman amplifier and 50km single-mode fiber 24 and fiber grating narrowband reflection wave filter 25, the distributed type optical fiber Raman photon temperature sensor is by semiconductor pulse laser 20,1x2 optical fiber bidirectional coupler 23, wavelength division multiplexer 26, anti Stokes scattering optical filter 27, Stokes Raman scattering optical filter 28 and two photoelectricity avalanche diodes 29,30 form, and distributed optical fiber Raman amplifier is made up of pumping optical fiber laser instrument 21 and pumping-signal optical fibre coupling mechanism 22; Semiconductor pulse laser 20 links to each other with the input end of pumping-signal optical fibre coupling mechanism 22 respectively with pumping optical fiber laser instrument 21, the output terminal of pumping-signal optical fibre coupling mechanism 22 links to each other with the input end of 1x2 optical fiber bidirectional coupler 23, an output terminal of 1x2 optical fiber bidirectional coupler 23 links to each other with 50km single-mode fiber 24, the Rayleigh scattering light dorsad of each section on the 50km single-mode fiber 24, Stokes links to each other with the input end of fiber grating narrowband reflection wave filter 25 with anti-Stokes Raman diffused light another output terminal by optical fiber 1x2 bidirectional coupler 23, the output terminal of fiber grating narrowband reflection wave filter 25 is connected with the input end of wavelength division multiplexer 26, the back-scattering light of wavelength division multiplexer 26 outputs is divided into two-way, one the tunnel dorsad anti Stokes scattering light through anti Stokes scattering optical filter 27 with convert light signal to electric signal, and the first photoelectricity avalanche diode 29 that amplifies links to each other, another road dorsad the Stokes Raman diffused light through Stokes Raman scattering optical filter 28 with convert light signal to electric signal, and the second photoelectricity avalanche diode 30 that amplifies links to each other.
In the utility model, said semiconductor pulse laser 20 can adopt pulse width less than 30ns, and wavelength is the high-capacity optical fiber laser in semiconductor process Bu Li-Bai Luo (FP) chamber of 1550nm.
It is 1455nm adjustable power fibre optic Raman laser that pumping optical fiber laser instrument 21 can adopt wavelength.
It is 1455nm that fiber grating narrowband reflection wave filter 25 can adopt wavelength, and narrow-band spectrum is spaced apart 1nm, and reflectivity is higher than 99.5%, and isolation is greater than the fiber grating filter of 35dB.
Wavelength division multiplexer 26 can adopt that to separate wavelength be that 1450nm bands of a spectrum anti-Stokes astigmatism and wavelength are the wavelength division multiplexer of 1660nm bands of a spectrum Stokes Raman scattering ripple.
It is 1450nm that anti Stokes scattering wave filter 27 can adopt wavelength, the wave filter of bandwidth＞30nm, isolation＞30dB.It is 1660nm that the wave filter 28 of Stokes Raman scattering ripple can adopt wavelength, the wave filter of Wide band＞30nm, isolation＞30dB.
Claims (7)
1. the very-long-range distributed type optical fiber Raman photon temperature sensor of an integrated raman amplifier, it is characterized in that comprising the distributed type optical fiber Raman photon temperature sensor, distributed optical fiber Raman amplifier and 50km single-mode fiber (24) and fiber grating narrowband reflection wave filter (25), the distributed type optical fiber Raman photon temperature sensor is by semiconductor pulse laser (20), 1x2 optical fiber bidirectional coupler (23), wavelength division multiplexer (26), anti Stokes scattering optical filter (27), Stokes Raman scattering optical filter (28) and two photoelectricity avalanche diodes (29), (30) form, distributed optical fiber Raman amplifier is made up of pumping optical fiber laser instrument (21) and pumping-signal optical fibre coupling mechanism (22); Semiconductor pulse laser (20) links to each other with the input end of pumping-signal optical fibre coupling mechanism (22) respectively with pumping optical fiber laser instrument (21), the output terminal of pumping-signal optical fibre coupling mechanism (22) links to each other with the input end of 1x2 optical fiber bidirectional coupler (23), an output terminal of 1x2 optical fiber bidirectional coupler (23) links to each other with 50km single-mode fiber (24), another output terminal of optical fiber 1x2 bidirectional coupler (23) links to each other with the input end of fiber grating narrowband reflection wave filter (25), the output terminal of fiber grating narrowband reflection wave filter (25) is connected with the input end of wavelength division multiplexer (26), the Raman diffused light dorsad of wavelength division multiplexer (26) output is divided into two-way, wherein, one the tunnel is the anti-Stokes Raman diffused light, through anti Stokes scattering optical filter (27) with convert light signal to electric signal, and the first photoelectricity avalanche diode (29) that amplifies links to each other, another road is the Stokes Raman diffused light, through Stokes Raman scattering optical filter (28) with convert light signal to electric signal, and the second photoelectricity avalanche diode (30) that amplifies links to each other.
2. the very-long-range distributed type optical fiber Raman photon temperature sensor of integrated raman amplifier according to claim 1, it is characterized in that said semiconductor pulse laser (20) be pulse width less than 30ns, wavelength is the high-capacity optical fiber laser in semiconductor process Bu Li-Bai Luo chamber of 1550nm.
3. the very-long-range distributed type optical fiber Raman photon temperature sensor of integrated raman amplifier according to claim 1 is characterized in that pumping optical fiber laser instrument (21) is that wavelength is the fibre optic Raman laser of the adjustable power of 1455nm.
4. the very-long-range distributed type optical fiber Raman photon temperature sensor of integrated raman amplifier according to claim 1, it is characterized in that fiber grating narrowband reflection wave filter (25) is that wavelength is 1455nm, narrow-band spectrum is spaced apart 1nm, reflectivity is higher than 99.5%, and isolation is greater than the fiber grating filter of 35dB.
5. the very-long-range distributed type optical fiber Raman photon temperature sensor of integrated raman amplifier according to claim 1 is characterized in that wavelength division multiplexer (26) is that to separate wavelength be that 1450nm bands of a spectrum anti-Stokes astigmatism and wavelength are the wavelength division multiplexer of 1660nm bands of a spectrum Stokes Raman scattering ripple.
6. the very-long-range distributed type optical fiber Raman photon temperature sensor of integrated raman amplifier according to claim 1 is characterized in that anti Stokes scattering wave filter (27) is that wavelength is 1450nm, the wave filter of bandwidth＞30nm, isolation＞30dB.
7. the very-long-range distributed type optical fiber Raman photon temperature sensor of integrated raman amplifier according to claim 1, the wave filter (28) that it is characterized in that Stokes Raman scattering ripple is that wavelength is 1660nm, the wave filter of Wide band＞30nm, isolation＞30dB.
Priority Applications (1)
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| CNU200720191219XU CN201107131Y (en) | 2007-11-15 | 2007-11-15 | Ultra-remote distributed type optical fiber Raman photon temperature sensor integrating Raman amplifier |
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| CNU200720191219XU CN201107131Y (en) | 2007-11-15 | 2007-11-15 | Ultra-remote distributed type optical fiber Raman photon temperature sensor integrating Raman amplifier |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552428B (en) * | 2008-12-24 | 2011-04-06 | 武汉光迅科技股份有限公司 | Online matt Raman amplifier with automatic shutdown and starting and control method thereof |
| CN102116684A (en) * | 2011-01-21 | 2011-07-06 | 中国计量学院 | Self-correcting fully-distributed optical fiber Raman scattering sensor |
| CN102226703A (en) * | 2011-03-29 | 2011-10-26 | 宁波诺驰光电科技发展有限公司 | Distributed fiber multi-parameter sensor and multi-parameter measuring method |
| CN102706494A (en) * | 2012-06-06 | 2012-10-03 | 中国人民解放军理工大学 | Real-time pressure sensing method based on fiber bragg grating reflected light polarization parameter |
| CN104344913A (en) * | 2014-10-09 | 2015-02-11 | 国家电网公司 | Temperature measurement system and method based on fiber grating sensing |
| CN104764540A (en) * | 2015-01-15 | 2015-07-08 | 合肥工业大学 | Raman fiber temperature measurement system combined with raman amplification technology |
| CN105067146A (en) * | 2015-03-20 | 2015-11-18 | 深圳市迅捷光通科技有限公司 | Stimulated raman scattering suppression device, method and distributed optical fiber sensing system |
-
2007
- 2007-11-15 CN CNU200720191219XU patent/CN201107131Y/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101552428B (en) * | 2008-12-24 | 2011-04-06 | 武汉光迅科技股份有限公司 | Online matt Raman amplifier with automatic shutdown and starting and control method thereof |
| CN102116684A (en) * | 2011-01-21 | 2011-07-06 | 中国计量学院 | Self-correcting fully-distributed optical fiber Raman scattering sensor |
| CN102116684B (en) * | 2011-01-21 | 2012-09-05 | 中国计量学院 | Self-correcting fully-distributed optical fiber Raman scattering sensor |
| CN102226703A (en) * | 2011-03-29 | 2011-10-26 | 宁波诺驰光电科技发展有限公司 | Distributed fiber multi-parameter sensor and multi-parameter measuring method |
| CN102706494A (en) * | 2012-06-06 | 2012-10-03 | 中国人民解放军理工大学 | Real-time pressure sensing method based on fiber bragg grating reflected light polarization parameter |
| CN102706494B (en) * | 2012-06-06 | 2014-03-19 | 中国人民解放军理工大学 | Real-time pressure sensing method based on fiber bragg grating reflected light polarization parameter |
| CN104344913A (en) * | 2014-10-09 | 2015-02-11 | 国家电网公司 | Temperature measurement system and method based on fiber grating sensing |
| CN104764540A (en) * | 2015-01-15 | 2015-07-08 | 合肥工业大学 | Raman fiber temperature measurement system combined with raman amplification technology |
| CN105067146A (en) * | 2015-03-20 | 2015-11-18 | 深圳市迅捷光通科技有限公司 | Stimulated raman scattering suppression device, method and distributed optical fiber sensing system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HANGZHOU OUYI OPTOELECTRONICS CO., LTD. Free format text: FORMER OWNER: CHINA METROLOGY COLLEGE Effective date: 20100319 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 310018 XUEYUAN STREET, XIASHA HIGHER EDUCATION PARK ZONE, HANGZHOU CITY, ZHEJIANG PROVINCE TO: 310018 NO.258, XUEYUAN STREET, XIASHA HIGHER EDUCATION PARK ZONE, HANGZHOU CITY, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100319 Address after: Hangzhou City, Zhejiang province 310018 Xiasha Higher Education Park source Street No. 258 Patentee after: Hangzhou OE Photoelectric Technology Co., Ltd. Address before: 310018 Xiasha Higher Education Park, Zhejiang, Hangzhou Patentee before: China Jiliang University |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080827 Termination date: 20091215 |