CN107576342A - A kind of extra long distance Brillouin optical time domain analysis instrument - Google Patents
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Abstract
A kind of extra long distance Brillouin optical time domain analysis instrument, pump light source 202 and probe source 102 are respectively placed in the both ends of sensor fibre 3 by the present invention, and in main equipment 1, backward pump laser 106 and forward pumping laser 206 are separately added into slave unit 2, realize to pump light source and the distributed raman amplification of probe source, effectively increase the intensity backwards to brillouin scattering signal, so as to expand the measurement distance of Brillouin optical time domain analysis instrument significantly on the premise of measurement performance is not sacrificed, meet extra long distance power overhead network, long-distance oil ＆ gas pipeline etc. monitors demand on-line；Further, the first fiber optical transceiver 101, the second fiber optical transceiver 201 have been internally integrated wavelength-division multiplex technique in the present invention, and two-way interactive and the control of master and slave equipment are realized by an optical fiber, and technical scheme is simple, are adapted to large-scale promotion and application.
Description
Technical field
The present invention relates to a kind of Brillouin optical time domain analysis instrument, and in particular to a kind of extra long distance Brillouin optical time domain analysis
Instrument.
Background technology
Known, distributed fiberoptic sensor is a kind of new sensing using laser backscatter effect as measurement mechanism
Device, according to the difference of scattering effect, Rayleigh, Raman and Brillouin's type sensor can be divided into.Wherein Brillouin optical time domain analysis instrument
It is the distributed fiberoptic sensor using stimulated Brillouin scattering effect, it is possible to achieve the fiber optic temperature of dozens of kilometres, strain are surveyed
Amount, has the characteristics that far measuring distance, measurement accuracy are high, is led in overhead transmission line, submarine cable, oil pipeline, civil structure etc.
Domain has relatively broad application, is current most one of fibre optical sensor of application prospect.
Brillouin optical time domain analysis instrument has two LASER Light Sources：Pump light and detection light, the frequency of one of laser are consolidated
It is fixed constant, the frequency of another laser then particles, the scanning of optical fiber Brillouin frequency spectrum is realized, so as to realize distributed light
Fine temperature, strain perceive.To realize pump light and detecting control and the frequency scanning of light, existing Brillouin optical time domain analysis
Device may be contained within pump light source and probe source in the cabinet of side of sensor fibre, and sensor fibre is matched somebody with somebody using U-shaped come and go
Put（Loop structure）.So, pump light and detection light are both needed to undergo the fiber lengths of twice distance sensing and could realize measurement,
This energy and time of measuring for not only wasting pump light and detecting light, more crucially limited by fiber nonlinear effect.
Found by retrieval, Chinese patent, patent name：A kind of long-distance optical fiber Brillouin light time domain analyzer；It is open
Number：CN102853857A；Publication date：On 01 02nd, 2013；Pump light and detection light are separately positioned on sensor fibre by it
Both ends, and both control is realized by the first and second remote communication modules, on the premise of measurement performance is not sacrificed, significantly
Improve the measurement distance of equipment.Continue to increase with fiber lengths, because the presence of fibre loss, detection light are more and more micro-
It is weak；And fiber nonlinear effect is limited to, the energy of detection light can not be increased by increasing incident optical power mode, so as to
Cause the measurement accuracy of tail end poor, extra long distance monitoring needs can not be met.For power overhead network, the distance of optical cable is general
All over longer, especially for super-pressure/extra high voltage line and west area, the distance of optical cable is above 100 kilometers substantially,
Even up to 100 kilometers.Prior art is difficult to meet the needs of extra long distance circuit distributed on line monitoring.
The content of the invention
Insufficient present in background technology to overcome, the invention provides a kind of extra long distance Brillouin optical time domain analysis
Instrument, the present invention can be effectively increased the distance sensing of system, and not sacrifice spatial resolution and measurement accuracy.
To realize goal of the invention as described above, the present invention uses technical scheme as described below：
A kind of extra long distance Brillouin optical time domain analysis instrument, including main equipment, slave unit, sensor fibre and telecommunication optical fiber, it is described
The output end of probe source is connected with the input of frequency measurement and signal output module in main equipment, frequency measurement and signal
The output end of output module is connected with the first port of the first wavelength division multiplexer, and the second port of the first wavelength division multiplexer is with after
It is connected to pump laser, the 3rd port of the first wavelength division multiplexer is connected with the left end of sensor fibre, the detection light
Source and frequency measurement and signal output module connect main equipment controller respectively, and the main equipment controller connects the first optical fiber and received
Device is sent out, the left end of the first fiber optical transceiver connection communication optical fiber, the output end of the pump light source in the slave unit is with disturbing
The input of inclined device is connected, and the output end of the scrambler is connected with the first port of the second wavelength division multiplexer, the second ripple
The second port of division multiplexer is connected with forward pumping laser, the 3rd port of the second wavelength division multiplexer and sensor fibre
Right-hand member is connected, and the pump light source and scrambler connect slave unit controller, the slave unit controller connection second respectively
Fiber optical transceiver, the right-hand member of the second fiber optical transceiver connection communication optical fiber form described extra long distance Brillouin light time domain
Analyzer.
Described extra long distance Brillouin optical time domain analysis instrument, the frequency measurement and signal output module include the first light
Fine coupler, pulse-modulator, optical circulator, the second fiber coupler, the 3rd fiber coupler, frequency detector and photoelectricity turn
Circuit is changed, the input of first fiber coupler is connected with the output end of probe source, and the of the first fiber coupler
One output end is connected with the input of pulse-modulator, the second output end and the 3rd fiber coupler of the first fiber coupler
First input end be connected, the output end of pulse-modulator is connected with the first port of optical circulator, the of optical circulator
Two-port netwerk is connected with an input of the second fiber coupler, the 3rd port of optical circulator and photoelectric switching circuit it is defeated
Entering end to be connected, another input of the second fiber coupler is connected with the second input of the 3rd fiber coupler, the
The output end of two fiber couplers is connected with the first port of the first wavelength division multiplexer, the output end of the 3rd fiber coupler with
The input of frequency detector is connected, the output end of frequency detector and the output end of photoelectric switching circuit respectively with main equipment
Controller connects.
Described extra long distance Brillouin optical time domain analysis instrument, first wavelength division multiplexer are that 1450/1550 broadband is thin
Membranous type wavelength division multiplexer.
Described extra long distance Brillouin optical time domain analysis instrument, second wavelength division multiplexer are that 1450/1550 broadband is thin
Membranous type wavelength division multiplexer.
Described extra long distance Brillouin optical time domain analysis instrument, the wavelength of the backward pump laser for 1420~
1480nm, the semiconductor laser that power is 200~500mW.
Described extra long distance Brillouin optical time domain analysis instrument, the wavelength of the forward pumping laser for 1420~
1480nm, the semiconductor laser that power is 200~500mW.
Described extra long distance Brillouin optical time domain analysis instrument, the wavelength of the probe source is 1550 ± 10nm.
Described extra long distance Brillouin optical time domain analysis instrument, the wavelength of the pump light source is 1550 ± 10nm.
Described extra long distance Brillouin optical time domain analysis instrument, the send wave a length of 1550 of first fiber optical transceiver ±
10nm, a length of 1310 ± 10nm of received wave.
Described extra long distance Brillouin optical time domain analysis instrument, the send wave a length of 1550 of second fiber optical transceiver ±
10nm, a length of 1310 ± 10nm of received wave.
Using technical scheme as described above, the present invention has superiority as described below：
Pump light source and probe source are respectively placed in the both ends of sensor fibre by the present invention, and in main equipment, slave unit respectively
Backward pump laser and forward pumping laser are added, realizes the distributed raman amplification to pump light source and probe source,
The intensity backwards to brillouin scattering signal is effectively increased, so as to be expanded significantly in cloth on the premise of measurement performance is not sacrificed
The measurement distance of deep optical time-domain analyzer, meet the on-line monitoring demand such as extra long distance power overhead network, long-distance oil ＆ gas pipeline；
Further, probe source and pump light source select semiconductor laser in the present invention, and one is that the line width of frequency-adjustable is
External cavity semiconductor laser within 30kHz, another is that the line width that frequency is fixed is semiconductor laser within 1MHz,
It is insensitive to extraneous vibration, and the cost of equipment can be reduced, nonlinear effect in optical fiber is reduced, optimizes the ultra long haul of equipment
From measurement performance；The first fiber optical transceiver, the second fiber optical transceiver have been internally integrated wavelength-division multiplex technique in the present invention, pass through one
Root optical fiber realizes two-way interactive and the control of master and slave equipment, and technical scheme is simple, is adapted to large-scale promotion and application.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram of the present invention；
Fig. 2 is the structural representation of frequency measurement and signal output module in the present invention；
Fig. 3 is the backscatter signals and the effect contrast figure of distribution-free formula Raman amplifiction after bi-directional distributed Raman amplification；
In figure：1st, main equipment；101st, the first fiber optical transceiver；102nd, probe source；103rd, frequency measurement and signal output mould
Block；1031st, the first fiber coupler；1032nd, pulse-modulator；1033rd, optical circulator；1034th, the second fiber coupler；
1035th, the 3rd fiber coupler；1036th, frequency detector；1037th, photoelectric switching circuit；104th, main equipment controller；105th,
One wavelength division multiplexer；106th, backward pump laser；2nd, slave unit；201st, the second fiber optical transceiver；202nd, pump light source；203、
Scrambler；204th, slave unit controller；205th, the second wavelength division multiplexer；206th, forward pumping laser；3rd, sensor fibre；4th, lead to
Believe optical fiber.
Embodiment
The present invention can be explained in more detail by the following examples, the invention is not limited in the following examples；
A kind of extra long distance Brillouin optical time domain analysis instrument with reference to described in accompanying drawing 1~2, including main equipment 1, slave unit 2, sensing
Optical fiber 3 and telecommunication optical fiber 4, the output end of probe source 102 and frequency measurement and signal output module 103 in the main equipment 1
Input be connected, the first port of the output end of frequency measurement and signal output module 103 and the first wavelength division multiplexer 105
It is connected, the second port of the first wavelength division multiplexer 105 is connected with backward pump laser 106, the first wavelength division multiplexer 105
The 3rd port be connected with the left end of sensor fibre 3, the probe source 102 and frequency measurement and signal output module 103
Main equipment controller 104 is connected respectively, and the main equipment controller 104 connects the first fiber optical transceiver 101, first optical fiber
The left end of the connection communication optical fiber 4 of transceiver 101, output end and the scrambler 203 of the pump light source 202 in the slave unit 2
Input is connected, and the output end of the scrambler 203 is connected with the first port of the second wavelength division multiplexer 205, the second ripple
The second port of division multiplexer 205 is connected with forward pumping laser 206, the 3rd port of the second wavelength division multiplexer 205 with
The right-hand member of sensor fibre 3 is connected, and the pump light source 202 and scrambler 203 connect slave unit controller 204 respectively, described
Slave unit controller 204 connects the second fiber optical transceiver 201, the right-hand member of the connection communication optical fiber 4 of the second fiber optical transceiver 201
Form described extra long distance Brillouin optical time domain analysis instrument.
Wherein described frequency measurement and signal output module 103 include the first fiber coupler 1031, pulse-modulator
1032nd, optical circulator 1033, the second fiber coupler 1034, the 3rd fiber coupler 1035, frequency detector 1036 and photoelectricity
Change-over circuit 1037, the input of first fiber coupler 1031 are connected with the output end of probe source 102, the first light
First output end of fine coupler 1031 is connected with the input of pulse-modulator 1032, and the of the first fiber coupler 1031
Two output ends are connected with the first input end of the 3rd fiber coupler 1035, output end and the ring of light shape of pulse-modulator 1032
The first port of device 1033 is connected, the second port of optical circulator 1033 and an input of the second fiber coupler 1034
It is connected, the 3rd port of optical circulator 1033 is connected with the input of photoelectric switching circuit 1037, the second fiber coupler
1034 another input is connected with the second input of the 3rd fiber coupler 1035, the second fiber coupler 1034
Output end is connected with the first port of the first wavelength division multiplexer 105, and output end and the frequency of the 3rd fiber coupler 1035 are visited
The input for surveying device 1036 is connected, the output end of frequency detector 1036 and the output end of photoelectric switching circuit 1037 respectively with
Main equipment controller 104 connects.
Further, the wavelength division multiplexer 205 of the first wavelength division multiplexer 105 and second is 1450/1550 broadband film
Type wavelength division multiplexer, the conjunction beam and forward pumping laser of backward pump laser 106 and probe source 102 are realized respectively
206 and the conjunction beam of pump light source 202.Due to using broadband film-type wavelength division multiplexer, to backward pump laser 106 and forward direction
The wavelength range of choice of pump laser 206 is larger, and is adapted to the application scheme of multistage Raman pump amplification.
Further, the wavelength of the backward pump laser 106 and forward pumping laser 206 be 1420~1480nm,
Power is 200~500mW semiconductor laser.Pump laser enters sensor fibre after wavelength division multiplexer, due to pumping
The input power of laser is bigger, causes stimulated Raman scattering, causes small fraction of incident light power to be transferred in sense light
On the probe source or pump light source together transmitted on fibre, distributed raman amplification is realized.Distributed raman amplification is using common
Optical fiber realizes the online amplification to flashlight, has high gain, crosstalk is small, noise figure is low, frequency range as gain media
Wide, the advantages that temperature stability is good.
Further, the probe source 102 and the wavelength of pump light source are 1550 ± 10nm, preferably, described spy
Light-metering source 102 and pump light source 202, one of them is that the line width of frequency-adjustable is external cavity type semiconductor laser within 30kHz
Device, another is that the line width that frequency is fixed is semiconductor laser within 1MHz.Small volume, the work temperature of semiconductor laser
Degree scope is wide, mature production technology, particularly insensitive to extraneous vibration, is adapted to long-term stable operation in industrial settings.It is right
In the preferred external cavity semiconductor laser of the semiconductor laser of frequency-adjustable, because the semiconductor laser phase with routine
Than the line width of external cavity semiconductor laser（Typically within 30kHz）And its frequency（Wavelength）- curent change coefficient
It is smaller, less frequency tuning step-length can be realized by changing the driving current of semiconductor laser, so as to realize optical fiber
The high-precision scanning probe of Brillouin's frequency spectrum.The semiconductor laser fixed for frequency, the line width that can select routine are
Semiconductor lasers of the 1MHz within.From cost of the wider semiconductor laser of line width except equipment can be reduced,
Nonlinear effect in optical fiber can also be effectively reduced, optimizes the extra long distance measurement performance of equipment.
Further, the fiber optical transceiver 201 of the first fiber optical transceiver 101 and second uses wavelength-division multiplex technique, sends
1550 ± 10nm of wavelength, 1310 ± 10nm of wavelength is received, data, most teletransmission are received and sent by the simultaneous transmission of telecommunication optical fiber 4
Defeated distance realizes two-way interactive and the control of main equipment 1 and slave unit 2 more than 150 kilometers.
The specific embodiment of the present invention is as follows：
A kind of extra long distance Brillouin optical time domain analysis instrument that the present embodiment provides, wherein probe source 102, frequency measurement and letter
Number output module 103, the first wavelength division multiplexer 101, backward pump laser 106 are controlled by main equipment controller 104, pump light
Source 202, scrambler 203, the second fiber optical transceiver 201, forward pumping laser 205 are controlled by slave unit controller 204, and first
The communication interaction of 101 and second fiber optical transceiver of fiber optical transceiver 201.Here, frequency measurement and signal output module 103 are used for pair
The continuous light progress frequency measurement for continuous light and pump light source 202 output that probe source 102 exports is simultaneously defeated by probe source 102
Backscatter signals of the continuous light modulation gone out into pulsed light and reception sensor fibre 3.
In specific implementation process, the wavelength of probe source 102 and pump light source 202 is 1550 ± 10nm, one of them
Line width for frequency-adjustable is the external cavity semiconductor laser within 30kHz, and another is that the line width that frequency is fixed is 1MHz
Within semiconductor laser, i.e., if probe source 102 be frequency-adjustable laser, then pump light source 202 consolidate for frequency
Fixed laser, if pump light source 202 is the laser of frequency-adjustable, probe source 102 is the laser that frequency is fixed.
In the present embodiment, probe source 102 is from the low noise external cavity semiconductor laser of RIO companies of U.S. production, middle cardiac wave
A length of 1550.12nm, power 10mW, line width 3kHz；Narrow linewidth of the pump light source 202 from the production of Japanese FITEL companies
Semiconductor laser, centre wavelength 1550.20nm, power 10mW, line width are<1MHz.
Frequency measurement and signal output module 103 are as shown in Fig. 2 the first fiber coupler 1031, the second fiber coupler
1034 be 10:90 fused biconical taper couplers, the 3rd fiber coupler 1035 are 50:50 fused biconical taper couplers, fiber annular
Wavelength is the unrelated circulator of polarization of 1550nm three ports centered on device 1033, and pulse-modulator 1032 is more than for extinction ratio
35dB electrooptic modulator, frequency detector 1036 are the InGaAs detectors of 18GHz bandwidth, and photoelectric switching circuit 1037 can be real
The optical signal detection of existing high speed signal.
The 155M optical fiber that first fiber optical transceiver 101 and the second fiber optical transceiver 201 are produced from Shenzhen Suo Putuo companies
Transceiver, using wavelength-division multiplex technique, 1550 ± 10nm of wavelength is sent, 1310 ± 10nm of wavelength is received, passes through a Communication ray
Fine 4 simultaneous transmissions receive and send data, and farthest transmission range realizes the two-way of main equipment and slave unit more than 150 kilometers
Interaction and control.
Main equipment controller 104 and slave unit controller 204 use existing controller, can in specific implementation process
Using the control circuit based on the good digital controller TMS320F28335 of American TI Company.Main equipment controller 104
It is mainly used in controlling the output wavelength and Output optical power of probe source 102, the output light of control backward pump laser 106
Power, the working condition of the first fiber optical transceiver 101 is controlled, and according to frequency measurement and the signal solution of signal output module 103
The brillouin frequency spectrum information of optical fiber each point is recalled, and then obtains optical fiber distributed temperature, strain information.Wherein control probe source
102 output wavelength parts can utilize existing PID（Proportional-integral-differential）Controller, can be defeated according to frequency detector 1036
Go out the wavelength of level value adjustment probe source 102；The Output optical power of probe source 102 is controlled to utilize standard laser control electricity
Road, Output optical power is adjusted by adjusting light source drive current.Slave unit controller 204 is mainly used in controlling pump light source 202
Working condition, control scrambler 203, the Output optical power of control forward pumping laser 206, control the second fiber optical transceiver
201 working condition.Wherein control pump light source 202 can utilize the existing control that can accurately adjust driving current and operating temperature
Circuit processed, control scrambler 203 use prior art, and the polarization that offset frequency rate is used to eliminate backscatter signals is disturbed in mainly optimization
Noise and eliminate frequency sonding it is polarization correlated.
First wavelength division multiplexer 105 and the second wavelength division multiplexer 205 are common fiber optic passive device, when it is implemented,
From 1450/1550 broadband film-type wavelength division multiplexer of the unlimited light company production in Shenzhen, realize that backward Raman pump swashs respectively
The conjunction beam and forward direction Raman pump laser 206 and the conjunction beam of pump light source 202 of light device 106 and probe source 102.Due to adopting
It is larger to the preceding wavelength range of choice to/backward Raman pump laser with broadband film-type wavelength division multiplexer, and be adapted to more
The application scheme of rank Raman pump amplification.
Forward pumping laser 106, backward pump laser 206 be wavelength be 1420~1480nm, power be 200~
500mW semiconductor laser, the present embodiment select the S37 series Raman pump lasers of JDSU companies production, and wavelength is
1460nm, power 450mW.Raman pump laser 106,206 enters after first, second wavelength division multiplexer 105,205 to be passed
Photosensitive fine 3.The defeated of Raman pump laser 106,206 is controlled by main equipment controller 104 and slave unit controller 204 respectively
Enter power, can be with the effect of Optimum distribution formula Raman amplifiction.Fig. 3 is using the backscattering letter after bi-directional distributed Raman amplification
Effect contrast figure number with distribution-free formula Raman amplifiction, about 150 kilometers of measurement distance.From figure 3, it can be seen that using bi-directional distributed
" forward direction Raman pump laser input power 305mW, backward Raman pump laser input power after formula Raman amplifiction
355mW ", the backscatter signals of front end decrease, but the backscatter signals of tail end greatly improve, so as to be achieved
150km extra long distances monitor.
Original U-shaped optical fiber loop structure is become line style both-end light channel structure, pump light source and detection light by the present embodiment
Source is respectively placed in the both ends of sensor fibre, and adds Raman pump laser in main equipment, slave unit, realizes to pump light source
With the distributed raman amplification of probe source, the intensity backwards to brillouin scattering signal is effectively increased, so as to not sacrifice survey
The measurement distance of Brillouin optical time domain analysis instrument is expanded on the premise of amount performance significantly, meets that extra long distance monitors need on-line
Ask.
Part not in the detailed description of the invention is prior art.
The embodiment selected herein for the open purpose of the present invention, is presently considered to be suitable, still, Ying Liao
Solution, it is contemplated that all changes and improvement including all embodiments belonged in this design and invention scope.
Claims (10)
1. a kind of extra long distance Brillouin optical time domain analysis instrument, including main equipment（1）, slave unit（2）, sensor fibre（3）With it is logical
Believe optical fiber（4）, it is characterized in that：The main equipment（1）Middle probe source（102）Output end and frequency measurement and signal output mould
Block（103）Input be connected, frequency measurement and signal output module（103）Output end and the first wavelength division multiplexer
（105）First port be connected, the first wavelength division multiplexer（105）Second port and backward pump laser（106）It is connected
Connect, the first wavelength division multiplexer（105）The 3rd port and sensor fibre（3）Left end be connected, the probe source（102）With
Frequency measurement and signal output module（103）Main equipment controller is connected respectively（104）, the main equipment controller（104）Even
Connect the first fiber optical transceiver（101）, first fiber optical transceiver（101）Connection communication optical fiber（4）Left end, the slave unit
（2）In pump light source（202）Output end and scrambler（203）Input be connected, the scrambler（203）Output
End and the second wavelength division multiplexer（205）First port be connected, the second wavelength division multiplexer（205）Second port and forward direction pump
Pu laser（206）It is connected, the second wavelength division multiplexer（205）The 3rd port and sensor fibre（3）Right-hand member be connected, institute
State pump light source（202）And scrambler（203）Slave unit controller is connected respectively（204）, the slave unit controller（204）Even
Connect the second fiber optical transceiver（201）, second fiber optical transceiver（201）Connection communication optical fiber（4）Right-hand member formed it is described
Extra long distance Brillouin optical time domain analysis instrument.
2. extra long distance Brillouin optical time domain analysis instrument according to claim 1, it is characterized in that：The frequency measurement and letter
Number output module（103）Including the first fiber coupler（1031）, pulse-modulator（1032）, optical circulator（1033）, second
Fiber coupler（1034）, the 3rd fiber coupler（1035）, frequency detector（1036）And photoelectric switching circuit（1037）, institute
State the first fiber coupler（1031）Input and probe source（102）Output end be connected, the first fiber coupler
（1031）The first output end and pulse-modulator（1032）Input be connected, the first fiber coupler（1031）Second
Output end and the 3rd fiber coupler（1035）First input end be connected, pulse-modulator（1032）Output end and the ring of light
Shape device（1033）First port be connected, optical circulator（1033）Second port and the second fiber coupler（1034）One
Individual input is connected, optical circulator（1033）The 3rd port and photoelectric switching circuit（1037）Input be connected,
Two fiber couplers（1034）Another input and the 3rd fiber coupler（1035）The second input be connected, second
Fiber coupler（1034）Output end and the first wavelength division multiplexer（105）First port be connected, the 3rd fiber coupler
（1035）Output end and frequency detector（1036）Input be connected, frequency detector（1036）Output end and photoelectricity
Change-over circuit（1037）Output end respectively with main equipment controller（104）Connection.
3. extra long distance Brillouin optical time domain analysis instrument according to claim 1, it is characterized in that：First wavelength-division multiplex
Device（105）For 1450/1550 broadband film-type wavelength division multiplexer.
4. extra long distance Brillouin optical time domain analysis instrument according to claim 1, it is characterized in that：Second wavelength-division multiplex
Device（205）For 1450/1550 broadband film-type wavelength division multiplexer.
5. extra long distance Brillouin optical time domain analysis instrument according to claim 1, it is characterized in that：The backward pump laser
Device（106）Wavelength be 1420~1480nm, the semiconductor laser that power is 200~500mW.
6. extra long distance Brillouin optical time domain analysis instrument according to claim 1, it is characterized in that：The forward pumping laser
Device（206）Wavelength be 1420~1480nm, the semiconductor laser that power is 200~500mW.
7. extra long distance Brillouin optical time domain analysis instrument according to claim 1, it is characterized in that：The probe source
（102）Wavelength be 1550 ± 10nm.
8. extra long distance Brillouin optical time domain analysis instrument according to claim 1, it is characterized in that：The pump light source
（202）Wavelength be 1550 ± 10nm.
9. extra long distance Brillouin optical time domain analysis instrument according to claim 1, it is characterized in that：First optical fiber transceiving
Device（101）The a length of 1550 ± 10nm of send wave, a length of 1310 ± 10nm of received wave.
10. extra long distance Brillouin optical time domain analysis instrument according to claim 1, it is characterized in that：Second optical fiber is received
Send out device（201）The a length of 1550 ± 10nm of send wave, a length of 1310 ± 10nm of received wave.
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| CN110243493A (en) * | 2019-06-03 | 2019-09-17 | 太原理工大学 | Brillouin optical time-domain reflectometer device and method based on super continuous spectrums |
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| CN102853857A (en) * | 2012-09-13 | 2013-01-02 | 宁波诺驰光电科技发展有限公司 | Long-distance optical fiber Brillouin optical time-domain analyzer |
| WO2014012411A1 (en) * | 2012-07-19 | 2014-01-23 | 南京大学 | Botda system based on pulse coding and coherent detection |
-
2017
- 2017-10-25 CN CN201711005029.9A patent/CN107576342A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014012411A1 (en) * | 2012-07-19 | 2014-01-23 | 南京大学 | Botda system based on pulse coding and coherent detection |
| CN102853857A (en) * | 2012-09-13 | 2013-01-02 | 宁波诺驰光电科技发展有限公司 | Long-distance optical fiber Brillouin optical time-domain analyzer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110243493A (en) * | 2019-06-03 | 2019-09-17 | 太原理工大学 | Brillouin optical time-domain reflectometer device and method based on super continuous spectrums |
| CN110243493B (en) * | 2019-06-03 | 2020-09-25 | 太原理工大学 | Brillouin optical time domain reflectometer device and method based on super-continuum spectrum |
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