CN106197498A - The method of work of laser sensor frequency division multiplexing device based on fiber grating - Google Patents
The method of work of laser sensor frequency division multiplexing device based on fiber grating Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 10
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- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000002463 transducing effect Effects 0.000 claims abstract description 9
- 230000035559 beat frequency Effects 0.000 claims description 30
- 238000005516 engineering process Methods 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 239000013307 optical fiber Substances 0.000 description 22
- 230000008859 change Effects 0.000 description 13
- 238000012544 monitoring process Methods 0.000 description 7
- 239000011551 heat transfer agent Substances 0.000 description 4
- 238000005388 cross polarization Methods 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
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- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052691 Erbium Inorganic materials 0.000 description 1
- ZVURWEGEYQQDAZ-UHFFFAOYSA-N [Y].[Er] Chemical compound [Y].[Er] ZVURWEGEYQQDAZ-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35383—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques
- G01D5/35393—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using multiple sensor devices using multiplexing techniques using frequency division multiplexing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
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Abstract
nullA kind of method of work of laser sensor frequency division multiplexing device based on fiber grating，Relate to Fibre Optical Sensor to measure，The present invention is to solve that existing multiposition measuring cost performance is low and the low problem of pump light conversion efficiency，The present invention includes pump light source、Fibre optic isolater、Wavelength division multiplexer、Photodetector、1*M bonder、Detector unit and M many longitudinal modes annular chamber laser sensor，Many longitudinal modes annular chamber laser sensor includes loop configuration、Fiber coupler and fiber grating，Pump light source、Fibre optic isolater、Wavelength division multiplexer is sequentially connected in series in the optical path，The light output end of wavelength division multiplexer connects with the light input end of 1*M bonder，The light input end of M many longitudinal modes annular chamber laser sensor connects with 1*M bonder simultaneously，The outfan of the transducing signal of wavelength division multiplexer connects with the input of the transducing signal of photodetector，The outfan of the detection signal of photodetector connects with detector unit.The present invention is applicable to multiposition and monitors in real time.
Description
Technical field
The invention belongs to Fibre Optical Sensor field of measuring technique, it relates to the monitoring of dynamic physical amount, multiposition is monitored in real time
Distributed sensing field.
Background technology
First G.A.Ball proposes beat frequency and demodulates this concept, and it utilizes a short cavity, the fiber-grating laser of single-frequency
Two orthogonal beat patterns that the inside exists, by measuring the beat signal frequency that two bundle cross-polarization laser interferences produce,
Respond as-4.1MHz/ μ ε to stress with beat frequency rate drift.J.T.Kringlebotn utilizes and acts on Active Optical Fiber subsequently
Transverse pressure can change intracavity cross-polarization optical maser wavelength, thus change the frequency of beat signal, it is achieved that to pressure
Measure, and eliminate the temperature impact on measuring.O.Hadeler utilize erbium yttrium be co-doped with polarization laser also achieve temperature and
Measure while stress, and give theoretical explanation.Fiber laser sensor particularly fiber grating laser sensor is general
On the basis of logical passive optical fiber grating sensor, fiber grating is write on Active Optical Fiber or is written to two fiber gratings it
Between, formed effective, there is the laserresonator of gain performance.When external physical quantity changes, the optical maser wavelength of outgoing,
Polarization or pattern generation respective change, by detecting the change of these laser parameters, can realize measuring monitoring physical quantity
Purpose.Fiber laser sensor has the good characteristics such as cheap, light, acid and alkali-resistance, anticorrosive and electromagnetism interference.According to
The detection mode of laser sensor is different, is currently mainly divided into phase type laser sensor and polarization-type laser sensor.
Although optical fiber interference type laser sensor has the precision of superelevation, it require that the optical interference equipment of a set of complexity
Go wavelength to the conversion of phase place.In theory, arm length difference is the biggest, and the response of wavelength-phase place is the biggest, at phase demodulating device
Phase resolution certain in the case of, precision is the highest.But the fact is the most in contrast, longer arm length difference also couples
Enter more environment noise so that the precision of laser sensor reduces.Therefore it practice, the theory of this interferometric demodulation instrument is smart
Degree is difficulty with, unless the temperature control equipment of superhigh precision is used to control the thermo parameters method around interferometer, but this
Sample considerably increases the cost of system.
Optical Fiber Polarization Type laser sensor gives a new thinking, the non-ideal circle of general optical fiber, and short optical fiber swashs
Light device typically can produce two orthogonal polarized light, and the two light is different at the light path of optical-fiber laser intracavity, causes two bundle laser
There are two different wavelength.Owing to they are the two bundle cross-polarization laser formed in same laser cavity, so between them
There is good coherence.Utilize fibre optic polarizer to become with pairwise orthogonal polarized light 45 degree of angular direction by two-beam coherent superposition, pass through
The frequency drift of the relevant beat signal produced of detection obtains heat transfer agent.
Utilize the premium properties of many longitudinal modes fiber laser sensor, in conjunction with dynamic beat frequency demodulation techniques can realize low cost,
Simple in construction, there is the high-performance sensors of dynamic demodulation ability.Periodical optics communication is at 2013 Published in China Pharmacies
" Simultaneous measurement of strain and temperature with a multi-
Longitudinal mode erbium-doped fiber laser " propose to utilize many longitudinal modes Erbium doped fiber laser sensor to enter
Measure while row stress and temperature.Utilize many longitudinal modes fiber laser sensor to temperature and the cross sensitivity of change of cavity length, reality
Now temperature and strain are measured simultaneously.Chinese patent " the optical fiber laser Dynamic Signal demodulation side of Publication No. CN102003970
Method " propose to produce between electronics beat frequency demodulation mode implementation pattern the demodulation of beat signal, it is achieved the dynamic demodulation energy of transducing signal
Power." a kind of fiber grating sensing demodulation based on dual wavelength beat frequency technology fills the Chinese patent of Publication No. CN102636203
Put " a kind of Fibre Optical Sensor demodulating equipment based on dual wavelength beat frequency technology is proposed, utilize the Fabry-Perot-type cavity of preparing grating,
In conjunction with tunable bandpass filters, it is achieved single longitudinal mode or the demodulation of many longitudinal modes ring cavity laser sensor, overcome existing based on beat frequency
The restriction needing to demodulate in the condition of single longitudinal mode of the sensor of technology.Chinese patent " the light of Publication No. CN102706375
Fibre-wireless hybrid sensing and monitoring system " propose to combine annular chamber many longitudinal modes fiber laser sensor and wireless sensor technology
Hybrid sensing single-point detecting system.
Optical-fiber laser sensing technology is widely used in the things such as the concentration of pressure, refractive index, chemistry and biological solution, temperature
On reason measurement.But being multiposition physical quantity due to be actually needed, and require real-time, this is accomplished by multiple many
Longitudinal mode annular chamber laser sensor, and each many longitudinal modes ring-like chamber laser sensor is in requisition for a light source and a set of demodulation
Light path, result needs multiple light source and demodulation light path in multiposition is measured in real time, causes cost high and a large amount of wastes of resource.
Many longitudinal modes ring-like chamber laser sensor due to only with a fiber grating as selecting wave device, and combine 3dB coupling
Device realizes resonator cavity and makes, and this simplify the manufacture difficulty of many longitudinal modes ring-like chamber laser sensor, reduces signal due to additionally
Phase matched and wave resonance coupling introduce noise, improve signal to noise ratio, weaken four-wave mixing noise.
Summary of the invention
The invention aims to solve existing multiposition measuring needs multiple many longitudinal modes annular chamber laser sensor,
And each many longitudinal modes annular chamber laser sensor is in requisition for a light source and demodulation light path, this cause its use cost high and
The problem of the wasting of resources, it is provided that a kind of many longitudinal modes annular chamber laser sensor frequency division multiplexing device based on beat frequency technology.
Many longitudinal modes annular chamber laser sensor frequency division multiplexing device based on beat frequency technology, it includes pump light source, optical fiber
Isolator, wavelength division multiplexer, photodetector, 1*M bonder, detector unit and M many longitudinal modes annular chamber laser sensor, M
For the integer more than 1, many longitudinal modes annular chamber laser sensor includes loop configuration, fiber coupler and fiber grating, ring junction
Two ports of structure connect with fiber coupler simultaneously, and fiber coupler and fiber grating are sequentially connected in series in the optical path, pump light
Source, fibre optic isolater, wavelength division multiplexer are sequentially connected in series in the optical path, the light output end of wavelength division multiplexer and the light of 1*M bonder
Input connects, and the light input end of M many longitudinal modes annular chamber laser sensor connects with 1*M bonder simultaneously, wavelength division multiplexer
The outfan of transducing signal connect with the input of the transducing signal of photodetector, photodetector detection signal defeated
Go out end to connect with the input of the detection signal of detector unit.
The present invention is achieved by a light source and demodulation light path and obtains M many longitudinal modes annular chamber laser sensor biography simultaneously
The output of sense signal, it is achieved that the multiplexing of M sensor probe.Solving existing single many longitudinal modes annular chamber laser sensor cannot
Know multiposition physical quantity simultaneously, and multiple many longitudinal modes annular chamber laser sensor needs asking of multiple light sources and demodulation light path
Topic.Realizing Multi-sensor parallel multiplexing, each sensor is independently measured, and improves the utilization rate of laser bandwidth, it is achieved sensor surpasses
Distance monitoring, the ability that multiposition is monitored in real time and signal location quickly positions.Reduce the one-tenth of application sensor array
This, the application making sensing technology is the most practical.The two of three-dB coupler 50% outfans are connected and composed loop configuration, and
Two chamber mirrors of resonator cavity are constituted with this loop configuration and fiber grating.Owing to using mono grating structures, decrease traditional double
In grating sensor, the phase matched between grating and wave resonance noise, improve signal to noise ratio further.Simultaneously without making two
The consistent grating of individual parameter, reduces manufacture difficulty, improves the practicality of laser sensor further.
Invention emphasis is proposing a kind of many longitudinal modes annular chamber laser sensor frequency division multiplexing device based on beat frequency technology, dress
Sensor in putting is the many longitudinal modes annular chamber laser sensor utilizing three-dB coupler, Er-doped fiber and fiber grating to constitute.Profit
The multiple longitudinal modes produced with sensor interfere formation beat signal as sensing multiplexed signals, and demodulation mode is all-electronin beat frequency solution
Adjust.The beat signal produced by many longitudinal modes annular chamber laser sensor is converted directly into electronics beat frequency by photodetector to be believed
Number, utilize the beat frequency rate of spectrum analyzer detection many longitudinal modes annular chamber laser sensor.Different many longitudinal modes annular chamber laser
Sensor is distinguished by effective Resonant Intake System, and inconsistent effective Resonant Intake System causes different many longitudinal modes annular chamber laser sensing
The beat frequency rate interval of device is inconsistent, i.e. utilizes frequency interval difference to realize distinguishing and alignment sensor purpose, it is achieved frequency division is multiple
With.The frequency setting interval of this device can come real by the effective length changing many longitudinal modes annular chamber laser sensor resonator cavity
Existing, this makes many longitudinal modes annular chamber laser sensor have more preferable adaptive capacity to environment, can change chamber according to actual needs long,
Promote the ability of multiposition detection further.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of many longitudinal modes annular chamber laser sensor in detailed description of the invention one.
Detailed description of the invention
Detailed description of the invention one:
In conjunction with Fig. 1 and Fig. 2, present embodiment is described, many longitudinal modes annular chamber laser based on beat frequency technology described in present embodiment
Sensor frequency division multiplexing device, it includes that pump light source 1, fibre optic isolater 2, wavelength division multiplexer 3, photodetector 4,1*M couple
Device 5,7 and M many longitudinal modes annular chamber laser sensors 6 of detector unit, M is the integer more than 1, many longitudinal modes annular chamber laser sensing
Device 6 includes loop configuration 6-1, fiber coupler 6-2 and fiber grating 6-3, and two ports of loop configuration 6-1 are simultaneously and optical fiber
Bonder 6-2 connects, and fiber coupler 6-2 and fiber grating 6-3 is sequentially connected in series in the optical path, pump light source 1, fibre optic isolater
2, wavelength division multiplexer 3 is sequentially connected in series in the optical path, and the light output end of wavelength division multiplexer 3 connects with the light input end of 1*M bonder 5
Logical, the light input end of M many longitudinal modes annular chamber laser sensor 6 connects with 1*M bonder 5 simultaneously, the sensing of wavelength division multiplexer 3
The outfan of signal connects with the input of the transducing signal of photodetector 4, the outfan of the detection signal of photodetector 4
Connect with the input of the detection signal of detector unit 7.
Loop configuration 6-1 is to utilize two 50% outfans of 3dB fiber coupler 6-2 by ordinary optic fibre (or er-doped light
Fine) connect and compose, 3dB fiber coupler 6-2 input is connected to fiber grating 6-3 by ordinary optic fibre (or Er-doped fiber)
On, constituted many longitudinal modes annular chamber laser sensor 6 with this.
Select the beat frequency rate ν that many longitudinal modes annular chamber laser sensor 6 producesNAs transducing signal, when strain is applied to
Time on many longitudinal modes annular chamber laser sensor, the change of cavity length that strain causes will cause the change of the mode spacing of the many longitudinal modes of laser
Changing, finally show as the change of beat frequency transducing signal frequency, it is expressed as follows:
(1)
PeFor optical fiber valid elastic-optic constants, the longitudinal strain of ε optical fiber.α is the thermal coefficient of expansion of optical fiber, and ξ is the hot spectrum of optical fiber
Number.ε and Δ T is consequently exerted at the strain on optical fiber and temperature information respectively.L is resonator cavity effective length, and n is that fiber resonance cavity has
Effect refractive index, c is light spread speed in a vacuum, and N is positive integer.By the change of beat signal, we can monitor temperature
Or the change of strain.
Owing to the many longitudinal modes of optical fiber ring-like chamber laser sensor 6 has only to a grating 6-3 as selecting wave device, so solving
Two optical grating reflection end chamber mirror wave length and the unmatched problem of optical grating reflection phase place in straight chamber, therefore have higher signal to noise ratio
Less phase noise.
The present invention uses semiconductor laser as pump light source, and pumping wavelength is 980nm or 1480nm, and pump light passes through
There is the fibre optic isolater suppressing light action dorsad and enter 1*M bonder, 1*M to wavelength division multiplexer 980nm end (1480nm end)
The input of bonder is connected to wavelength division multiplexer common port, and M outfan of 1*M bonder connects M sensor respectively and visit
Head, sensor probe is many longitudinal modes ring-like chamber laser sensor 6.Pump light source 980nm (or 1480nm) provides luminous power to reach
During many longitudinal modes sensor threshold value, output 1550nm wave band of laser incited somebody to action by sensor, and the heat transfer agent of laser carry sensors, with this reality
Existing information sensing and transmission purpose, regulate sensor resonant cavity length, it is achieved sets M sensor beat signal frequency interval mesh
, utilize beat frequency rate spacing difference to characterize the metrical information of different sensors, it is achieved multiple sensor multiplexing.By wavelength-division multiplex
1550 ends of device are connected to detector optical port, and detector is high frequency light electric explorer, and detector is by the photo-beat of M sensor
Frequently signal is converted to electronic signal, by frequency detecting, learns that any sensor beat frequency rate changes in real time, it is achieved sensing measurement
Purpose.
M many longitudinal modes annular chamber laser sensor 6 is due to chamber length difference, so the beat frequency interval produced is also different, and sensing
Device lays at any detecting location, and detectable signal includes the physical quantity informations such as stress, temperature, pressure, changing of detection physical quantity
The effective cavity length altering into fiber resonance cavity changes, and then causes swashing of M many longitudinal modes annular chamber laser sensor 6 generation
The beat signal interval that the interference of light is formed changes, and i.e. treats that measurement information is converted to beat frequency interval and changes, M many longitudinal modes annular chamber
The multilongitudianl-mode laser that laser sensor 6 self produces is relevant, will not produce the cross interference between sensor because of multiplexing,
Multiplied sensor signal can be coupled to same optical-fibre channel, and frequency information change produced by different sensors can utilize photoelectricity
Detector 4 Direct Acquisition, after opto-electronic conversion, it is achieved many longitudinal-mode beat frequencies signal is converted to electronics beat signal, beat frequency
Sigtnal interval is not affected by electronic commutation, which solves generation interference in demodulating process and causes heat transfer agent demodulation distortion
Problem, electronics beat signal is analyzed by detector unit 7, it is achieved that beat signal dynamic monitoring, by beat frequency rate
Knots modification calculate obtain heat transfer agent.
This many longitudinal modes annular chamber laser sensor 6 is not limited to shape as shown in Figure 1, and intracavity optical fiber can be according to actual needs
Adjusting, can be wrapped in object under test surface, chamber infrared optical fiber can be according to different placement design connecting lengths, chamber infrared optical fiber
Length change does not affect sensor accuracy, it is simple to applies and uses under the special environment harsh to sensor bulk, status requirement.
This many longitudinal modes annular chamber laser sensor Frequency Division Multiplexing system based on fiber beat technology can be applied at complicated electromagnetism ring
Under border, it is achieved to physical message monitorings such as vibration, stress, temperature, being particularly well-suited to need large area to monitor, required precision is high
The monitoring field being difficult to Deng traditional sensors, and have huge advantage in aerospace smart skins field.The present invention
Annular chamber many longitudinal modes fiber laser sensor 6 shape changeable, be wound on a cylinder as integrated, thus it be special to realize some
The infomation detection of different occasion.It is contemplated that propose the sensor array that a kind of real-time multichannel is monitored simultaneously, it is achieved optical networking
Management.
Detailed description of the invention two:
Illustrate that present embodiment, present embodiment are to indulge based on beat frequency technology described in detailed description of the invention one more in conjunction with Fig. 2
The further restriction of mould annular chamber laser sensor frequency division multiplexing device, 1*M bonder 5 uses waveguide type bonder.
Detailed description of the invention three:
Illustrate that present embodiment, present embodiment are to indulge based on beat frequency technology described in detailed description of the invention one more in conjunction with Fig. 2
The further restriction of mould annular chamber laser sensor frequency division multiplexing device, fiber coupler 6-2 uses 3dB fiber coupler.
Two 50% outfans of three-dB coupler 6-2 connect and compose loop configuration 6-1, and with this loop configuration 6-1 and light
Fine grating 6-3 constitutes two chamber mirrors of resonator cavity.
The resonator cavity of many longitudinal modes annular chamber laser sensor 6 be by be connected to fiber grating 6-3 and three-dB coupler 6-2 it
Between ordinary optic fibre or Er-doped fiber, and loop configuration 6-1 that is connected to form of two 50% outfans of three-dB coupler 6-2 in
Ordinary optic fibre or Er-doped fiber collectively form.
Utilize photodetector that the beat frequency rate of many longitudinal modes annular chamber laser sensor is converted directly into electronic signal, knot
Sum of fundamental frequencies analysis of spectrum detector unit is directly analyzed.
Claims (1)
1. the method for work of many longitudinal modes annular chamber laser sensor frequency division multiplexing device based on beat frequency technology, it is characterised in that
Described frequency division multiplexing device includes: pump light source (1), fibre optic isolater (2), wavelength division multiplexer (3), photodetector (4), 1*
M bonder (5), detector unit (7) and M many longitudinal mode annular chamber laser sensor (6), M is the integer more than 1, many longitudinal modes ring
Shape chamber laser sensor (6) includes loop configuration (6-1), fiber coupler (6-2) and fiber grating (6-3), loop configuration (6-
1) two ports connect with fiber coupler (6-2) simultaneously, and fiber coupler (6-2) is sequentially connected in series with fiber grating (6-3)
In the optical path, pump light source (1), fibre optic isolater (2), wavelength division multiplexer (3) are sequentially connected in series in the optical path, wavelength division multiplexer
(3) light output end connects with the light input end of 1*M bonder (5), and the light of M many longitudinal mode annular chamber laser sensor (6) is defeated
Enter end to connect with 1*M bonder (5), the outfan of the transducing signal of wavelength division multiplexer (3) and the biography of photodetector (4) simultaneously
The input connection of sense signal, the outfan of the detection signal of photodetector (4) is defeated with the detection signal of detector unit (7)
Enter end connection；
Described method of work, including: when pump light source provides luminous power to reach many longitudinal modes sensor threshold value, many longitudinal modes annular chamber
Laser sensor (6) will export 1550nm wave band of laser, and laser carries the sensing letter of many longitudinal modes annular chamber laser sensor (6)
Breath, realizes information sensing and transmission purpose with this, regulates many longitudinal modes annular chamber laser sensor (6) cavity length, it is achieved set
Determine M many longitudinal modes annular chamber laser sensor (6) beat signal frequency interval purpose, utilize beat frequency rate spacing difference to characterize not
Metrical information with sensor, it is achieved multiple sensor multiplexing；
The light beat signal of M many longitudinal mode annular chamber laser sensor (6) is converted to electronic signal by photodetector, by frequency
Rate detects, and learns that any one many longitudinal modes annular chamber laser sensor (6) beat frequency rate changes in real time, it is achieved sensing measurement mesh
's.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610521886.3A CN106197498A (en) | 2013-11-21 | 2013-11-21 | The method of work of laser sensor frequency division multiplexing device based on fiber grating |
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| CN201610521886.3A CN106197498A (en) | 2013-11-21 | 2013-11-21 | The method of work of laser sensor frequency division multiplexing device based on fiber grating |
| CN201310593967.0A CN103575313B (en) | 2013-11-21 | 2013-11-21 | Many longitudinal modes annular chamber laser sensor frequency division multiplexing device based on beat frequency technology |
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| CN201310593967.0A Division CN103575313B (en) | 2013-11-21 | 2013-11-21 | Many longitudinal modes annular chamber laser sensor frequency division multiplexing device based on beat frequency technology |
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| CN201610520647.6A Pending CN106197496A (en) | 2013-11-21 | 2013-11-21 | A kind of laser sensor frequency division multiplexing device using photodetector |
| CN201610520787.3A Pending CN106052729A (en) | 2013-11-21 | 2013-11-21 | Laser sensor frequency division multiplexing device with photoelectric detector and fiber grating |
| CN201610516350.2A Pending CN105953826A (en) | 2013-11-21 | 2013-11-21 | Laser sensor frequency division multiplexing device adopting optical fiber coupler and fiber bragg grating |
| CN201610521040.XA Pending CN106197497A (en) | 2013-11-21 | 2013-11-21 | A kind of laser sensor frequency division multiplexing device using fiber coupler |
| CN201610521886.3A Pending CN106197498A (en) | 2013-11-21 | 2013-11-21 | The method of work of laser sensor frequency division multiplexing device based on fiber grating |
| CN201310593967.0A Active CN103575313B (en) | 2013-11-21 | 2013-11-21 | Many longitudinal modes annular chamber laser sensor frequency division multiplexing device based on beat frequency technology |
| CN201610515764.3A Expired - Fee Related CN106197494B (en) | 2013-11-21 | 2013-11-21 | A kind of laser sensor frequency division multiplexing device based on fiber grating |
| CN201610515765.8A Expired - Fee Related CN106197495B (en) | 2013-11-21 | 2013-11-21 | Using fibre optic isolater and the laser sensor frequency division multiplexing device of fiber grating |
| CN201610522092.9A Pending CN106197499A (en) | 2013-11-21 | 2013-11-21 | Use pump light source and the laser sensor frequency division multiplexing device of fiber grating |
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| CN201610520787.3A Pending CN106052729A (en) | 2013-11-21 | 2013-11-21 | Laser sensor frequency division multiplexing device with photoelectric detector and fiber grating |
| CN201610516350.2A Pending CN105953826A (en) | 2013-11-21 | 2013-11-21 | Laser sensor frequency division multiplexing device adopting optical fiber coupler and fiber bragg grating |
| CN201610521040.XA Pending CN106197497A (en) | 2013-11-21 | 2013-11-21 | A kind of laser sensor frequency division multiplexing device using fiber coupler |
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| CN201610515764.3A Expired - Fee Related CN106197494B (en) | 2013-11-21 | 2013-11-21 | A kind of laser sensor frequency division multiplexing device based on fiber grating |
| CN201610515765.8A Expired - Fee Related CN106197495B (en) | 2013-11-21 | 2013-11-21 | Using fibre optic isolater and the laser sensor frequency division multiplexing device of fiber grating |
| CN201610522092.9A Pending CN106197499A (en) | 2013-11-21 | 2013-11-21 | Use pump light source and the laser sensor frequency division multiplexing device of fiber grating |
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| CN106679935A (en) * | 2017-01-20 | 2017-05-17 | 黑龙江大学 | Single-mode fiber birefringence measurement device and method |
| CN113916271A (en) * | 2021-10-11 | 2022-01-11 | 欧梯恩智能科技(苏州)有限公司 | Optical sensor addressing chip, optical sensor addressing module, optical sensor measuring system and optical sensor measuring method |
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| JP2017535316A (en) | 2014-09-30 | 2017-11-30 | 深▲せん▼市大耳馬科技有限公司Ｓｈｅｎｚｈｅｎ Ｄａｒｍａ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏ．，Ｌｔｄ． | Posture and vital signs monitoring system and method |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN106197495B (en) | 2018-05-11 |
| CN105953826A (en) | 2016-09-21 |
| CN106197496A (en) | 2016-12-07 |
| CN103575313B (en) | 2016-08-31 |
| CN103575313A (en) | 2014-02-12 |
| CN106197497A (en) | 2016-12-07 |
| CN106052729A (en) | 2016-10-26 |
| CN106197495A (en) | 2016-12-07 |
| CN106197494A (en) | 2016-12-07 |
| CN106197494B (en) | 2018-05-11 |
| CN106197499A (en) | 2016-12-07 |
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