CN109884704A - A kind of device and method for eliminating optical fiber detector system noise - Google Patents
A kind of device and method for eliminating optical fiber detector system noise Download PDFInfo
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- CN109884704A CN109884704A CN201910049858.XA CN201910049858A CN109884704A CN 109884704 A CN109884704 A CN 109884704A CN 201910049858 A CN201910049858 A CN 201910049858A CN 109884704 A CN109884704 A CN 109884704A
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Abstract
A kind of device for eliminating optical fiber detector system noise, it include: pump light source 1, reference optical fiber wave detector 2, first dense wave division multiplexer 3, non-equilibrium interferometer 4, second dense wave division multiplexer 5, photodetector array 6, data acquisition and signal processing unit 7, the pump light source 1 is connect with optical fiber detector array and reference optical fiber wave detector 2 respectively, first dense wave division multiplexer 3 is connect with the optical fiber detector array and reference optical fiber wave detector 2 respectively, the non-equilibrium interferometer 4 is connect with first dense wave division multiplexer 3, second dense wave division multiplexer 5 is connect with the non-equilibrium interferometer 4, the photodetector array 6 is connect with second dense wave division multiplexer 5, the data acquisition is connect with signal processing unit 7 with the photodetector array 6, Optical fiber detector system noise can be eliminated.
Description
Technical field
The invention belongs to Fibre Optical Sensor field of signal processing, are in particular a kind of eliminations based on optical fiber sensing technology
The device and method of optical fiber detector system noise.
Background technique
Relative to traditional moving-coil geophone and piezoelectric detector, optical fiber detector has many excellent properties,
Such as: high sensitivity, dynamic range be big, electromagnetism interference, it is anticorrosive, small in size, light-weight, be easy to be multiplexed, this makes the skill
Art is in necks such as the adverse circumstances such as underground, highly sensitive sensing (such as micro-seismic monitoring, safety monitoring), bottom mounted sonar and hydrophones
Domain possesses broad application prospect.With the development of optical fiber detector technology, various optical fiber detectors and corresponding demodulation techniques
It is put forward one after another, optical fiber detector and corresponding (FBG) demodulator constitute optical fiber detector system.At present in optical fiber detector system
An existing crucial problem is that (FBG) demodulator is sensitive to extraneous environmental noise in detector system, which results in optical fiber inspection
Wave device system can not judge that (FBG) demodulator demodulates the signal come and comes from extraneous environmental noise to solution in actual application
The signal that the interference of tune instrument or wave detector detect, this problem limits the development of optical fiber detector technology and practical applications.
At this moment, optical fiber detector system must be under the premise of completing collecting signal as far as possible by the optimization design of system hardware, soft
The response of optical fiber detector system external circle ambient noise is eliminated in the optimization design of part key parameter and the improvement of demodulating algorithm.
In conclusion building high performance optical fiber detector system to solve the above-mentioned technical bottleneck faced, compel at present
It is essential and wants a kind of method for eliminating optical fiber detector system noise.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of high performance optical fiber detector system level elimination optical fiber detector
The method of system noise.
The present invention provides a kind of devices for eliminating optical fiber detector system noise, including, pump light source 1, reference optical fiber
Wave detector 2, the first dense wave division multiplexer 3, non-equilibrium interferometer 4, the second dense wave division multiplexer 5, photodetector array
6, data acquisition with signal processing unit 7, the pump light source 1 respectively with optical fiber detector array and reference optical fiber wave detector 2
Connection excites the optical fiber detector for providing pump energy to the optical fiber detector array and reference optical fiber wave detector 2
Array generates first laser output and the reference optical fiber wave detector 2 is excited to generate second laser output；The first intensive wave
Division multiplexer 3 is connect with the optical fiber detector array and reference optical fiber wave detector 2 respectively, defeated for receiving the first laser
It is exported out with the second laser, and synthesizes the output of third laser；The non-equilibrium interferometer 4 and first dense wavelength division are multiple
It is connected with device 3, for receiving the third laser output, and the wave that first laser output and the second laser are exported
Long shifted signal is converted into phase signal；Second dense wave division multiplexer 5 is connect with the non-equilibrium interferometer 4, is used for
The third laser output is received, and is separated into the first laser output and second laser output, and be delivered to photodetection
Device array 6；The photodetector array 6 is connect with second dense wave division multiplexer 5, for the first laser is defeated
Laser signal out is converted to the first electric signal, and the laser signal that the second laser exports is converted to the second electric signal；Institute
It states data acquisition to connect with signal processing unit 7 with the photodetector array 6, for acquiring first electric signal and the
Two electric signals are simultaneously handled it, obtain sensor fibre detector array generate laser output first wave length shifted signal and
Reference optical fiber wave detector 2 generates the second wave length shifted signal of laser output, obtains external information and optical fiber detector system certainly
The environmental noise of body, for eliminating optical fiber detector system noise.
According to embodiment of the present invention, the device further includes photo-coupler 8, for by pump light source 1
Output light is divided into two-way output, and the photo-coupler 8 includes photo-coupler input terminal, the first output end and second output terminal；Institute
Photo-coupler input terminal is stated to connect with pump light source 1；First output end is connect with the optical fiber detector array；Described
Two output ends are connect with the reference optical fiber wave detector 2.
According to embodiment of the present invention, the device further includes that the first wavelength division multiplexer 9 and the second wavelength-division are multiple
With device 10, first wavelength division multiplexer 9 exports double for realizing the output light of the pump light source 1 and the first laser
To transmission；Second wavelength division multiplexer 10 exports for realizing the output light of the pump light source 1 and the second laser
Transmitted in both directions；The input port of first wavelength division multiplexer 9 is connect with the first output port of the photo-coupler 8；It is described
The common end of first wavelength division multiplexer 9 is connect with the sensor fibre detector array；The laser of first wavelength division multiplexer 9
Output port is connect with the input port of first dense wave division multiplexer 3；The input terminal of second wavelength division multiplexer 10
Mouth is connect with the second output terminal mouth of the photo-coupler 8；The common end of second wavelength division multiplexer 10 and the reference light
Fine wave detector 2 connects；The laser output mouth of second wavelength division multiplexer 10 is defeated with first dense wave division multiplexer 3
Inbound port connection.
According to embodiment of the present invention, first dense wave division multiplexer 3 and the second dense wave division multiplexer 5
Channel wavelength it is consistent with the wavelength of the wavelength of the optical fiber detector array and the reference optical fiber wave detector 2.
According to embodiment of the present invention, the non-equilibrium interferometer 4 is one or more, when described non-equilibrium dry
It is in parallel between each other when interferometer 4 is multiple.
According to embodiment of the present invention, the non-equilibrium interferometer 4 be non-equilibrium Michelson's interferometer or
At least one of non-equilibrium Mach-Zehnder interferometer.
According to an aspect of the invention, there is provided a kind of method for eliminating optical fiber detector system noise, including, first
Step S1 provides pump energy to optical fiber detector array and reference optical fiber wave detector 2, the optical fiber detector array is excited to produce
Raw first laser exports and excites the reference optical fiber wave detector 2 to generate second laser output；Second step S2 receives described the
The output of one laser and second laser output, and synthesize the output of third laser；It is defeated to receive the third laser by third step S3
Out, and by the wave length shift signal of first laser output and second laser output it is converted into phase signal；4th step
Rapid S4 receives the third laser output, and is separated into the first laser output and second laser output, and be delivered to photoelectricity
Detector array 6；The laser signal that the first laser exports is converted to the first electric signal by the 5th step S5, by described
The laser signal of dual-laser output is converted to the second electric signal；6th step S6 acquires first electric signal and the second telecommunications
Number and it is handled, obtain sensor fibre detector array generate laser output first wave length shifted signal and reference light
Fine wave detector 2 generates the second wave length shifted signal of laser output, obtains the ring of external information and optical fiber detector system itself
Border noise, for eliminating optical fiber detector system noise.
According to another aspect of the present invention, a kind of optical fiber detector Demodulation Systems instrument, the optical fiber detector are provided
Demodulation Systems instrument is by pump light source 1, photo-coupler 8, the first wavelength division multiplexer 9, the second wavelength division multiplexer 10, reference optical fiber detection
Device 2, the first dense wave division multiplexer 3, non-equilibrium interferometer 4, the second dense wave division multiplexer 5,6 sum number of photodetector array
It is formed according to acquisition and signal processing unit 7, wherein 8 input port of photo-coupler is connect with the output port of pump light source 1；Light
First output port of coupler 8 is connect with the input port of the first wavelength division multiplexer 9, the second output terminal mouth of photo-coupler 8
It is connect with the input port of the second wavelength division multiplexer 10；The common end of first wavelength division multiplexer 9 is connect with optical fiber detector array,
Its laser output is connect with the first dense wave division multiplexer 3；The common end of second wavelength division multiplexer 10 and optical fiber detector battle array
Column connection, laser output are connect with the first dense wave division multiplexer 3；First its output port of dense wave division multiplexer 3 with
The input port of non-equilibrium interferometer 4 connects；Second dense wave division multiplexer 5, input port are defeated with non-equilibrium interferometer 4
The input port of exit port connection, output port and photoelectronic detecting array connects；The input port of photodetector array 6 with
The output port of second dense wave division multiplexer 5 connects；Input port and photodetection of the data acquisition with signal processing unit 7
The output port of device array 6 connects.
The present invention uses reference optical fiber wave detector, acquires the interference and outer signals of environment itself, eliminates optical fiber detection
Device system noise can effectively eliminate the response of optical fiber detector system external circle ambient noise；Photo-coupler is used, so that two
Road pump light is mutually isolated；Using each Interleave muiltiplexing component element, signal transmission is improved, signal transmission line is simplified, the present invention
The optical fiber detector Demodulation Systems instrument is practical, can push development of the optical fiber detector system in engineering application.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of device for eliminating optical fiber detector system noise；
Fig. 2 is the schematic diagram of photo-coupler；
Fig. 3 is the schematic diagram of the first wavelength division multiplexer and the second wavelength division multiplexer；And
Fig. 4 is a kind of step schematic diagram of method for eliminating optical fiber detector system noise.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, and reference label refers to the group in the present invention
Part, technology, realizing under appropriate circumstances so as to advantages and features of the invention can be easier to be understood.Following description is pair
The materialization of the claims in the present invention, and other specific implementations not clearly stated relevant to claim also belong to power
The range that benefit requires.
Fig. 1 shows a kind of schematic diagram of device for eliminating optical fiber detector system noise.
As shown in Figure 1, a kind of device for eliminating optical fiber detector system noise, comprising: pump light source 1, reference optical fiber inspection
Wave device 2, the first dense wave division multiplexer 3, non-equilibrium interferometer 4, the second dense wave division multiplexer 5, photodetector array 6,
Data acquisition and signal processing unit 7, the pump light source 1 connect with optical fiber detector array and reference optical fiber wave detector 2 respectively
It connects, for providing pump energy to the optical fiber detector array and reference optical fiber wave detector 2, excites the optical fiber detector battle array
Column generate first laser output and the reference optical fiber wave detector 2 are excited to generate second laser output；First dense wavelength division
Multiplexer 3 is connect with the optical fiber detector array and reference optical fiber wave detector 2 respectively, for receiving the first laser output
It is exported with the second laser, and synthesizes the output of third laser；The non-equilibrium interferometer 4 and first dense wave division multipurpose
Device 3 connects, for receiving the third laser output, and the wavelength that first laser output and the second laser are exported
Shifted signal is converted into phase signal；Second dense wave division multiplexer 5 is connect with the non-equilibrium interferometer 4, for connecing
The third laser output is received, and is separated into the first laser output and second laser output, and be delivered to photodetector
Array 6；The photodetector array 6 is connect with second dense wave division multiplexer 5, for exporting the first laser
Laser signal be converted to the first electric signal, the laser signal that the second laser exports is converted into the second electric signal；It is described
Data acquisition is connect with signal processing unit 7 with the photodetector array 6, for acquiring first electric signal and second
Electric signal is simultaneously handled it, obtains first wave length shifted signal and ginseng that sensor fibre detector array generates laser output
The second wave length shifted signal that optical fiber detector 2 generates laser output is examined, external information and optical fiber detector system itself are obtained
Environmental noise, for eliminating optical fiber detector system noise.
The optical fiber detector array is sensor fibre detector array.When external environment variation, laser is exported
Wavelength is to generate drift；The sensor fibre detector array is for detecting outer signals, such as seismic wave.
The reference optical fiber wave detector 2 also forming array form, when device of the present invention itself receives external environment
Interference when, 2 Output of laser wavelength of reference optical fiber wave detector be generate drift；The sensor fibre detector array is used for
The environmental noise of detection optical fiber detector system (FBG) demodulator itself, such as vibration, sound.
Pump light source 1, output pump light are divided into two-way, all the way for providing pumping energy to sensor fibre detector array
Amount, excitation fiber detector array generate laser output；Another way is used to provide pump energy to reference optical fiber wave detector 2,
Reference optical fiber wave detector 2 is excited to generate laser output.
The pump light source 1 provides pump energy, excites the optical fiber detector array and the reference optical fiber wave detector
2, respective laser output is generated, the output of two-way laser is by the first dense wave division multiplexer 3 and synthesizes all the way, as third laser
Output.The third laser output is transmitted to non-equilibrium interferometer 4 and is converted into phase signal.The third laser output is transmitted to
Second dense wave division multiplexer 5 is restored to two-way output, then passes through transformation of the optical signal to electric signal, by the data
Acquisition is handled with signal processing unit 7, obtains the environmental noise of external information and optical fiber detector system itself, to eliminate
Optical fiber detector system noise.
Fig. 2 shows the schematic diagrames of photo-coupler.
As shown in Fig. 2, the device, further includes photo-coupler 8, for the output light of pump light source 1 to be divided into two-way
Output, the photo-coupler 8 include 8 input terminal of photo-coupler, the first output end and second output terminal；The photo-coupler 8 is defeated
Enter end to connect with pump light source 1；First output end is connect with the optical fiber detector array；The second output terminal and institute
State the connection of reference optical fiber wave detector 2.
8 pairs of photo-coupler inputs, output electric signal have good buffer action, input port and pump light source 1
Output port connection, for by 1 output light of pump light source be divided into two-way output；Its first output port exports pump light and enters
Sensor fibre detector array is used as pump light；Its second output terminal mouth output pump light enters reference optical fiber wave detector 2
It is used as pump light.To keep two-way pump light mutually isolated.
Fig. 3 shows the schematic diagram of the first wavelength division multiplexer and the second wavelength division multiplexer.
It further include the first wavelength division multiplexer 9 and the second wavelength division multiplexer 10 as shown in figure 3, the device, described first
The transmitted in both directions that wavelength division multiplexer 9 exports for realizing the output light of the pump light source 1 and the first laser；Described second
The transmitted in both directions that wavelength division multiplexer 10 exports for realizing the output light of the pump light source 1 and the second laser；Described
The input port of one wavelength division multiplexer 9 is connect with the first output port of the photo-coupler 8；First wavelength division multiplexer 9
Common end connect with the sensor fibre detector array；The laser output mouth of first wavelength division multiplexer 9 with it is described
The input port of first dense wave division multiplexer 3 connects；The input port of second wavelength division multiplexer 10 and the optical coupling
The second output terminal mouth of device 8 connects；The common end of second wavelength division multiplexer 10 is connect with the reference optical fiber wave detector 2；
The laser output mouth of second wavelength division multiplexer 10 is connect with the input port of first dense wave division multiplexer 3.
Since the optical carrier of different wave length is considered as independent mutually (when not considering nonlinear fiber), thus one
The multiplexing transmission of multipath light signal can be achieved in root optical fiber.The signal of both direction is arranged in different wave length transmission respectively
Realize transmitted in both directions.According to the difference of wavelength division multiplexer, the number of wavelengths that can be multiplexed is also different, differs from two to tens,
This depends on the gap size of permitted optical carrier wavelength.
For sensor fibre detector array, the pump light that pump light source 1 generates is to the sensor fibre detector array
Transmission, and the laser output oil that the sensor fibre detector array generates is defeated outward from the sensor fibre detector array
Out, the signal of both direction can be arranged in respectively to different wave length transmission using wavelength division multiplexer can be realized two-way biography
It is defeated.The structure for simplifying device in the present invention using the first wavelength division multiplexer 9 and the second wavelength division multiplexer 10 optimizes signal biography
Defeated path.
The wave band one of described its operation wavelength of first wavelength division multiplexer 9 and pump light source 1 and sensor fibre detector array
It causes；Described its operation wavelength of second wavelength division multiplexer 10 is consistent with the wave band of pump light source 1 and reference optical fiber wave detector 2.
1 output light of pump light source is divided into two-way output by the photo-coupler 8；Its first output port exports pump light warp
The first wavelength division multiplexer 9 is crossed to use into sensor fibre detector array as pump light；The output pumping of its second output terminal mouth
Light enters reference optical fiber wave detector 2 as pump light by the second wavelength division multiplexer 10 and uses.
A kind of embodiment according to the present invention, first dense wave division multiplexer 3 and the second dense wave division multiplexer 5
Channel wavelength it is consistent with the wavelength of the wavelength of the optical fiber detector array and the reference optical fiber wave detector 2.
A kind of embodiment according to the present invention, the non-equilibrium interferometer 4 are one or more, when described non-equilibrium dry
It is in parallel between each other when interferometer 4 is multiple.
In fig. 1-3, the non-equilibrium interferometer 4 is one, and different type or identical can be connected in form in parallel
The non-equilibrium interferometer 4 of type carries out the amendment of result between each other.
A kind of embodiment according to the present invention, the non-equilibrium interferometer 4 be non-equilibrium Michelson's interferometer or
At least one of non-equilibrium Mach-Zehnder interferometer.
Fig. 4 shows a kind of step schematic diagram of method for eliminating optical fiber detector system noise.
As shown in figure 4, a kind of method for eliminating optical fiber detector system noise, including, first step S1, to optical fiber detection
Device array and reference optical fiber wave detector 2 provide pump energy, excite the optical fiber detector array generate first laser output and
The reference optical fiber wave detector 2 is excited to generate second laser output；Second step S2 receives first laser output and described
Second laser output, and synthesize the output of third laser；Third step S3, receives third laser output, and by described first
The wave length shift signal of laser output and second laser output is converted into phase signal；Four steps S4 receives described the
The output of three laser, and it is separated into the first laser output and second laser output, and be delivered to photodetector array 6；The
The laser signal that the first laser exports is converted to the first electric signal by five step S5, is swashed what the second laser exported
Optical signal is converted to the second electric signal；6th step S6 acquires first electric signal and the second electric signal and at it
Reason obtains first wave length shifted signal and the generation of reference optical fiber wave detector 2 that sensor fibre detector array generates laser output
The second wave length shifted signal of laser output, obtains the environmental noise of external information and optical fiber detector system itself, for disappearing
Except optical fiber detector system noise.
According to another aspect of the present invention, a kind of optical fiber detector Demodulation Systems instrument, the optical fiber detector system solution
Adjust instrument by pump light source 1, photo-coupler 8, the first wavelength division multiplexer 9, the second wavelength division multiplexer 10, reference optical fiber wave detector 2, the
One dense wave division multiplexer 3, non-equilibrium interferometer 4, the second dense wave division multiplexer 5, photodetector array 6 and data acquisition
It is formed with signal processing unit 7, wherein 8 input port of photo-coupler is connect with the output port of pump light source 1；Photo-coupler 8
The first output port connect with the input port of the first wavelength division multiplexer 9, the second output terminal mouth and the second wave of photo-coupler 8
The input port of division multiplexer 10 connects；The common end of first wavelength division multiplexer 9 is connect with optical fiber detector array, and laser is defeated
Outlet is connect with the first dense wave division multiplexer 3；The common end of second wavelength division multiplexer 10 is connect with optical fiber detector array,
Laser output is connect with the first dense wave division multiplexer 3；First its output port of dense wave division multiplexer 3 and non-equilibrium interference
The input port of instrument 4 connects；The output port of second dense wave division multiplexer 5, input port and non-equilibrium interferometer 4 connects
It connects, the input port connection of output port and photoelectronic detecting array；The input port of photodetector array 6 and second is intensively
The output port of wavelength division multiplexer 5 connects；The input port and photodetector array 6 of data acquisition and signal processing unit 7
Output port connection.
The present invention uses reference optical fiber wave detector, acquires the interference and outer signals of environment itself, eliminates optical fiber detection
Device system noise can effectively eliminate the response of optical fiber detector system external circle ambient noise；Photo-coupler is used, so that two
Road pump light is mutually isolated；Using each Interleave muiltiplexing component element, signal transmission is improved, signal transmission line is simplified, the present invention
The optical fiber detector Demodulation Systems instrument is practical, can push development of the optical fiber detector system in engineering application.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and this
Field technical staff can be designed alternative embodiment without departing from the scope of the appended claims.In the claims
Any reference symbol between parentheses should not be configured to limitations on claims.
Claims (8)
1. a kind of device for eliminating optical fiber detector system noise, including, pump light source (1), reference optical fiber wave detector (2), the
One dense wave division multiplexer (3), non-equilibrium interferometer (4), the second dense wave division multiplexer (5), photodetector array (6),
Data acquisition and signal processing unit (7),
The pump light source (1) connect with optical fiber detector array and reference optical fiber wave detector (2) respectively, is used for the optical fiber
Detector array and reference optical fiber wave detector (2) provide pump energy, and the optical fiber detector array is excited to generate first laser
Export and excite the reference optical fiber wave detector (2) to generate second laser output；
First dense wave division multiplexer (3) connect with the optical fiber detector array and reference optical fiber wave detector (2) respectively,
For receiving the first laser output and second laser output, and synthesize the output of third laser；
The non-equilibrium interferometer (4) connect with first dense wave division multiplexer (3), defeated for receiving the third laser
Out, and by the wave length shift signal of first laser output and second laser output it is converted into phase signal；
Second dense wave division multiplexer (5) connect with the non-equilibrium interferometer (4), defeated for receiving the third laser
Out, and it is separated into the first laser output and second laser output, and is delivered to photodetector array (6)；
The photodetector array (6) connect with second dense wave division multiplexer (5), for the first laser is defeated
Laser signal out is converted to the first electric signal, and the laser signal that the second laser exports is converted to the second electric signal；
The data acquisition is connect with signal processing unit (7) with the photodetector array (6), for acquiring described first
Electric signal and the second electric signal are simultaneously handled it, obtain the first wave length that sensor fibre detector array generates laser output
Shifted signal and reference optical fiber wave detector (2) generate the second wave length shifted signal of laser output, obtain external information and optical fiber
The environmental noise of detector system itself, for eliminating optical fiber detector system noise.
2. the apparatus according to claim 1 further includes photo-coupler (8), for the output light of pump light source (1) to be divided into
Two-way output,
The photo-coupler (8) includes photo-coupler input terminal, the first output end and second output terminal；
The photo-coupler input terminal is connect with pump light source (1)；First output end and the optical fiber detector array connect
It connects；The second output terminal is connect with the reference optical fiber wave detector (2).
3. the apparatus of claim 2 further includes the first wavelength division multiplexer (9) and the second wavelength division multiplexer (10), institute
State the two-way biography that the first wavelength division multiplexer (9) exports for realizing the output light of the pump light source (1) and the first laser
It is defeated；
Second wavelength division multiplexer (10) exports for realizing the output light of the pump light source (1) and the second laser
Transmitted in both directions；
The input port of first wavelength division multiplexer (9) is connect with the first output port of the photo-coupler 8；
The common end of first wavelength division multiplexer (9) is connect with the sensor fibre detector array；
The input port of the laser output mouth of first wavelength division multiplexer (9) and first dense wave division multiplexer (3)
Connection；
The input port of second wavelength division multiplexer (10) is connect with the second output terminal mouth of the photo-coupler (8)；
The common end of second wavelength division multiplexer (10) is connect with the reference optical fiber wave detector (2)；
The input port of the laser output mouth of second wavelength division multiplexer (10) and first dense wave division multiplexer (3)
Connection.
4. the apparatus according to claim 1, wherein first dense wave division multiplexer (3) and the second dense wavelength division are multiple
It is consistent with the wavelength of the wavelength of the optical fiber detector array and the reference optical fiber wave detector (2) with the channel wavelength of device (5).
5. the apparatus according to claim 1, the non-equilibrium interferometer (4) is one or more, when described non-equilibrium dry
It is in parallel between each other when interferometer (4) is multiple.
6. the apparatus according to claim 1, the non-equilibrium interferometer (4) is non-equilibrium Michelson's interferometer or non-
At least one of balanced Mach Zehnder interferometer.
7. a kind of method for eliminating optical fiber detector system noise, including,
First step (S1) provides pump energy to optical fiber detector array and reference optical fiber wave detector (2), excites the optical fiber
Detector array generates first laser output and the reference optical fiber wave detector (2) is excited to generate second laser output；
Second step (S2) receives the first laser output and second laser output, and synthesizes the output of third laser；
Third step (S3) receives the third laser output, and first laser output and the second laser is exported
Wave length shift signal be converted into phase signal；
Four steps (S4) receives the third laser output, and is separated into the first laser output and second laser output,
And it is delivered to photodetector array (6)；
The laser signal that the first laser exports is converted to the first electric signal by the 5th step (S5), by the second laser
The laser signal of output is converted to the second electric signal；
6th step (S6) acquires first electric signal and the second electric signal and handles it, obtains sensor fibre inspection
Wave device array generates the first wave length shifted signal of laser output and reference optical fiber wave detector (2) generates the second wave that laser exports
Long shifted signal obtains the environmental noise of external information and optical fiber detector system itself, for eliminating optical fiber detector system
Noise.
8. a kind of optical fiber detector Demodulation Systems instrument, the optical fiber detector Demodulation Systems instrument is by pump light source (1), photo-coupler
(8), the first wavelength division multiplexer (9), the second wavelength division multiplexer (10), reference optical fiber wave detector (2), the first dense wave division multiplexer
(3), at non-equilibrium interferometer (4), the second dense wave division multiplexer (5), photodetector array (6) and data acquisition and signal
Manage unit (7) composition, wherein
Photo-coupler (8) input port is connect with the output port of pump light source (1)；First output port of photo-coupler (8)
It is connect with the input port of the first wavelength division multiplexer (9), the second output terminal mouth and the second wavelength division multiplexer of photo-coupler (8)
(10) input port connection；
The common end of first wavelength division multiplexer (9) is connect with optical fiber detector array, laser output and the first dense wavelength division
Multiplexer (3) connection；The common end of second wavelength division multiplexer (10) is connect with optical fiber detector array, laser output and
One dense wave division multiplexer (3) connection；
First dense wave division multiplexer (3) its output port is connect with the input port of non-equilibrium interferometer (4)；Second intensive wave
Division multiplexer (5), input port are connect with the output port of non-equilibrium interferometer (4), output port and photodetection battle array
The input port of column connects；
The input port of photodetector array (6) is connect with the output port of the second dense wave division multiplexer (5)；Data acquisition
It is connect with the input port of signal processing unit (7) with the output port of photodetector array (6).
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101277151A (en) * | 2008-05-16 | 2008-10-01 | 北京邮电大学 | Optical fiber sensing system structure based on wavelength division multiplexing |
| CN101561536A (en) * | 2008-04-16 | 2009-10-21 | 中国科学院半导体研究所 | Optical fiber sensing wavelength demodulating system for resisting oscillation and noise disturbance |
| CN101901531A (en) * | 2009-05-31 | 2010-12-01 | 中国石油天然气管道局 | Fiber interferometer-based area anti-intrusion method |
| CN102147552A (en) * | 2011-03-11 | 2011-08-10 | 大连理工大学 | Unbalanced interferometer based fiber bragg grating (FBG) demodulation system and method |
| CN102564317A (en) * | 2011-12-23 | 2012-07-11 | 北京交通大学 | High-accuracy remote absolute displacement measurement system based on optical fiber composite interference |
| CN103727966A (en) * | 2014-01-22 | 2014-04-16 | 中国人民解放军国防科学技术大学 | Method and device for phase noise suppression of remote optical fiber interference system in spectral line operation |
| CN103837166A (en) * | 2014-03-03 | 2014-06-04 | 中国人民解放军国防科学技术大学 | Method and device for suppressing phase noise of long-distance optical fiber interference system based on optical path difference matching |
| CN105444793A (en) * | 2015-11-16 | 2016-03-30 | 上海交通大学 | Fiber Bragg raster sensing device based on high-speed pulse laser |
| CN108592963A (en) * | 2018-03-29 | 2018-09-28 | 北京大学 | A kind of suppressing method and its system of time division multiplexing optical fiber sensing system multiplicative noise |
-
2019
- 2019-01-18 CN CN201910049858.XA patent/CN109884704A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101561536A (en) * | 2008-04-16 | 2009-10-21 | 中国科学院半导体研究所 | Optical fiber sensing wavelength demodulating system for resisting oscillation and noise disturbance |
| CN101277151A (en) * | 2008-05-16 | 2008-10-01 | 北京邮电大学 | Optical fiber sensing system structure based on wavelength division multiplexing |
| CN101901531A (en) * | 2009-05-31 | 2010-12-01 | 中国石油天然气管道局 | Fiber interferometer-based area anti-intrusion method |
| CN102147552A (en) * | 2011-03-11 | 2011-08-10 | 大连理工大学 | Unbalanced interferometer based fiber bragg grating (FBG) demodulation system and method |
| CN102564317A (en) * | 2011-12-23 | 2012-07-11 | 北京交通大学 | High-accuracy remote absolute displacement measurement system based on optical fiber composite interference |
| CN103727966A (en) * | 2014-01-22 | 2014-04-16 | 中国人民解放军国防科学技术大学 | Method and device for phase noise suppression of remote optical fiber interference system in spectral line operation |
| CN103837166A (en) * | 2014-03-03 | 2014-06-04 | 中国人民解放军国防科学技术大学 | Method and device for suppressing phase noise of long-distance optical fiber interference system based on optical path difference matching |
| CN105444793A (en) * | 2015-11-16 | 2016-03-30 | 上海交通大学 | Fiber Bragg raster sensing device based on high-speed pulse laser |
| CN108592963A (en) * | 2018-03-29 | 2018-09-28 | 北京大学 | A kind of suppressing method and its system of time division multiplexing optical fiber sensing system multiplicative noise |
Non-Patent Citations (1)
| Title |
|---|
| 王兴亮 等: "《现代通信系统新技术（第二版）》", 31 May 2017 * |
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