CN107907070A - A kind of strain measurement system based on MZ filter structure optical fiber lasers - Google Patents
A kind of strain measurement system based on MZ filter structure optical fiber lasers Download PDFInfo
- Publication number
- CN107907070A CN107907070A CN201711444116.4A CN201711444116A CN107907070A CN 107907070 A CN107907070 A CN 107907070A CN 201711444116 A CN201711444116 A CN 201711444116A CN 107907070 A CN107907070 A CN 107907070A
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- China
- Prior art keywords
- optical fiber
- coupler
- division multiplexer
- wavelength division
- filter structure
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/18—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge using photoelastic elements
Abstract
The invention discloses a kind of strain measurement system based on MZ filter structure optical fiber lasers, including pumping source, wavelength division multiplexer, doped fiber, coupler, spectrometer and slightly bore optical fiber；The wavelength division multiplexer, doped fiber, coupler and thick cone optical fiber are connected into by optical fiber gang up structure successively respectively；The pumping source passes through optical fiber and wavelength division multiplexer welding；The spectrometer passes through optical fiber and coupler welding；The optical fiber is 9/125 μm of single mode optical fiber；The present invention relates to technical field of optical fiber sensing；The strain measurement system based on MZ filter structure optical fiber lasers, pass through being used cooperatively for PC ends, ASE light sources, optical fiber circulator, spectroanalysis instrument, connector and controller, realize to the strain testing based on MZ filter structure optical fiber lasers, more favourable scientific basis is provided for the development of fibre optical sensor, the accuracy of test is also improved while improving testing efficiency, it is highly practical, use easy to spread.
Description
Technical field
The present invention relates to technical field of optical fiber sensing, is specially that a kind of strain based on MZ filter structure optical fiber lasers is surveyed
Test system.
Background technology
Optical fiber laser refers to the laser by the use of doped rare earth element glass optical fiber as gain media, and optical fiber laser can be
Developed on the basis of fiber amplifier：High power density is easily being formed in optical fiber under the action of pump light, is causing laser
The laser levels " population inversion " of operation material, shake when being suitably added positive feedback loop (composition resonator) and can form laser
Swing output, optical fiber laser application range is very extensive, including laser fiber communication, laser space remote communication, industrial shipbuilding,
Automobile making, laser engraving laser marking laser cutting, printing roller processed, metal and nonmetal drilling/(brazing, quench for cutting/welding
Water, covering and depth welding), military and national defense safety, medical instrument instrument and equipment, large foundation construction, as other laser
Pumping source of device etc..
Optical fiber laser has wideband adjustable, higher letter as a kind of laser light source with broad prospect of application
The advantages such as ratio, relatively narrow output laser linewidth of making an uproar are widely used in the fields such as Fibre Optical Sensor, fiber optic communication, optical manufacturing.Light
Fibre laser is made of pumping source, resonator and gain media three parts, and the chamber of optical fiber laser length is longer, optical fiber it is non-linear
Effect is more obvious, it is therefore necessary to shortens the length of Er-doped fiber, while short cavity is also that optical fiber laser realizes that single longitudinal mode is transported
The essential condition of work.Tunable wave length circular cavity optic fibre laser is simple in structure and is easily achieved, and the structure is usually by a pair of of ripple
Division multiplexer, coupler, pumping source and the gain media composition being connected between.Circular cavity optic fibre laser is commonly used in generation
Narrow-linewidth laser exports, and interference filter structure is inserted into annular cavity laser can realize that length flexible is tunable.
At present, the species of optical fiber laser is relatively various, and internal structure is more scientific, is obtained in many fields
It is widely applied, the technology for using and developing relative maturity, still, not preferably to based on MZ filter structure light
Should changing direction for fibre laser is tested, in this regard also there is deficiency, the further research for the scholar that requires study.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of strain testing based on MZ filter structure optical fiber lasers
System, is realized to the strain testing based on MZ filter structure optical fiber lasers, for fibre optical sensor development provide it is more favourable
Scientific basis.
In order to achieve the above object, the present invention is achieved by the following technical programs：One kind is based on MZ filter structure optical fiber
The strain measurement system of laser, including pumping source, wavelength division multiplexer, doped fiber, coupler, spectrometer and slightly bore optical fiber；
The wavelength division multiplexer, doped fiber, coupler and thick cone optical fiber are connected into by optical fiber gang up structure successively respectively；The pump
Pu source passes through optical fiber and wavelength division multiplexer welding；The spectrometer passes through optical fiber and coupler welding.
Preferably, the thick cone optical fiber forms Mach once moral structure, and Mach once moral structure by 9/125 μm of single mode and 5/
130 μm of single mode optical fibers are formed.
The invention also discloses a kind of strain measurement system and its test method based on MZ filter structure optical fiber lasers,
Specifically comprise the following steps：
If step 1, choose first pumping source, wavelength division multiplexer, doped fiber, coupler, spectrometer and thick cone optical fiber and
Dry root optical fiber, it is spare；
Step 2, by the wavelength division multiplexer chosen in step 1, doped fiber, coupler and thick cone optical fiber pass through light respectively
Fibre is fused into gangs up structure successively, then by pumping source by fused fiber splice on wavelength division multiplexer, spectrometer is finally passed through into light
Fine welding is on coupler；
Step 3, carry out temperature calibration to the optical fiber laser built in step 2；The main material of optical fiber is quartz glass,
By straining the influencing characterisitic to MZ interference structures, change the structure of overall resonance chamber, cause resonator length to occur corresponding
Expansion or shrinkage, so that cause longitudinal mode to drift about, when straining increase, chamber length elongation, red shift of wavelength；When straining reduction,
Chamber length reduces, wavelength blue shift.Strain is gradually increased or reduced in setting range of strain, and the size of record longitudinal mode drift, obtains
Longitudinal mode with strain variation curve；
Step 4, by the calibration curve obtained between temperature and laser longitudinal module measure temperature, utilizes temperature calibration
Curve, determines temperature residing for resonator；So as to complete the performance test to optical fiber laser.
Beneficial effect
The present invention provides a kind of strain measurement system based on MZ filter structure optical fiber lasers.Possess following beneficial to effect
Fruit：
The strain measurement system based on MZ filter structure optical fiber lasers, by PC ends, ASE light sources, optical fiber circulator,
Spectroanalysis instrument, connector and controller are used cooperatively, and are realized to the strain testing based on MZ filter structure optical fiber lasers,
More favourable scientific basis is provided for the development of fibre optical sensor, the accurate of test is also improved while improving testing efficiency
Property, highly practical, use easy to spread.
Brief description of the drawings
Fig. 1 is the measurement system diagram of the present invention；
Fig. 2 is the thick cone optical fiber structure schematic diagram of the present invention；
Fig. 3 is the temperature change schematic diagram of the present invention；
In figure：1- pumping sources, 2- wavelength division multiplexers, 3- doped fibers, 4- couplers, 5- spectrometers, 6- slightly bore optical fiber.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
- 3 are please referred to Fig.1, the present invention provides a kind of technical solution：A kind of strain based on MZ filter structure optical fiber lasers
Test system, including pumping source 1, wavelength division multiplexer 2, doped fiber 3, coupler 4, spectrometer 5 and thick cone optical fiber 6；The ripple
Division multiplexer 2, doped fiber 3, coupler 4 and thick cone optical fiber 6 are connected into by optical fiber gang up structure successively respectively；The pumping
Source 1 passes through optical fiber and 2 welding of wavelength division multiplexer；The spectrometer 5 passes through optical fiber and 4 welding of coupler.
A kind of strain measurement system based on MZ filter structure optical fiber lasers, the thick cone optical fiber 6 form Mach Zeng De
Structure, and once moral structure is made of Mach 9/125 μm of single mode and 5/130 μm of single mode optical fiber.
A kind of strain measurement system and its test method based on MZ filter structure optical fiber lasers, specifically include following step
Suddenly：
Step 1, choose pumping source 1, wavelength division multiplexer 2, doped fiber 3, coupler 4, spectrometer 5 and slightly bore optical fiber first
6 and some optical fiber, it is spare；
Step 2, lead to the wavelength division multiplexer 2 chosen in step 1, doped fiber 3, coupler 4 and thick cone optical fiber 6 respectively
Cross optical fiber and be fused into successively and gang up structure, then by pumping source 1 by fused fiber splice on wavelength division multiplexer 2, finally by spectrometer 5
By fused fiber splice on coupler 4；
Step 3, carry out temperature calibration to the optical fiber laser built in step 2；The main material of optical fiber is quartz glass,
By straining the influencing characterisitic to MZ interference structures, change the structure of overall resonance chamber, cause resonator length to occur corresponding
Expansion or shrinkage, so that cause longitudinal mode to drift about, when straining increase, chamber length elongation, red shift of wavelength；When straining reduction,
Chamber length reduces, wavelength blue shift.Strain is gradually increased or reduced in setting range of strain, and the size of record longitudinal mode drift, obtains
Longitudinal mode with strain variation curve；
Step 4, by the calibration curve obtained between temperature and laser longitudinal module measure temperature, utilizes temperature calibration
Curve, determines temperature residing for resonator；So as to complete the performance test to optical fiber laser.
It should be noted that herein, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any this actual relation or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to
Non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed, or further include as this process, method, article or equipment
Intrinsic key element.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of changes, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (3)
1. a kind of strain measurement system based on MZ filter structure optical fiber lasers, it is characterised in that including pumping source (1), ripple
Division multiplexer (2), doped fiber (3), coupler (4), spectrometer (5) and thick cone optical fiber (6)；The wavelength division multiplexer (2), mix
Veiling glare fibre (3), coupler (4) and thick cone optical fiber (6) are connected into by optical fiber gang up structure successively respectively；The pumping source (1)
Pass through optical fiber and wavelength division multiplexer (2) welding；The spectrometer (5) passes through optical fiber and coupler (4) welding.
2. a kind of strain measurement system based on MZ filter structure optical fiber lasers according to claim 1, its feature exist
Form Mach once moral structure in, the thick cone optical fiber (6), and Mach once moral structure by 9/125 μm of single mode and 5/130 μm of single mode
Optical fiber is formed.
3. a kind of strain measurement system and its test method based on MZ filter structure optical fiber lasers, it is characterised in that specific
Include the following steps：
Step 1, first choose pumping source (1), wavelength division multiplexer (2), doped fiber (3), coupler (4), spectrometer (5) and slightly
Optical fiber (6) and some optical fiber are bored, it is spare；
Step 2, bore the wavelength division multiplexer chosen in step 1 (2), doped fiber (3), coupler (4) and slightly optical fiber (6) point
Be not fused into successively by optical fiber and gang up structure, then by pumping source (1) by fused fiber splice on wavelength division multiplexer (2), finally
By spectrometer (5) by fused fiber splice on coupler (4)；
Step 3, carry out temperature calibration to the optical fiber laser built in step 2；The main material of optical fiber is quartz glass, is passed through
The influencing characterisitic to MZ interference structures is strained, changes the structure of overall resonance chamber, causes resonator length that corresponding expansion occurs
Or shrink, so that cause longitudinal mode to drift about, and when straining increase, chamber length elongation, red shift of wavelength；When straining reduction, chamber length
Reduce, wavelength blue shift.Strain is gradually increased or reduced in setting range of strain, and the size of record longitudinal mode drift, obtains longitudinal mode
With the curve of strain variation；
Step 4, by the calibration curve obtained between temperature and laser longitudinal module measure temperature, utilizes temperature calibration bent
Line, determines temperature residing for resonator；So as to complete the performance test to optical fiber laser.
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| CN201711444116.4A CN107907070A (en) | 2017-12-27 | 2017-12-27 | A kind of strain measurement system based on MZ filter structure optical fiber lasers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109632132A (en) * | 2018-12-27 | 2019-04-16 | 北京信息科技大学 | Thermometry based on FBG-FP structured optical fiber laser |
Citations (6)
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|---|---|---|---|---|
| US5420688A (en) * | 1992-12-14 | 1995-05-30 | Farah; John | Interferometric fiber optic displacement sensor |
| CN103267999A (en) * | 2013-06-01 | 2013-08-28 | 青岛农业大学 | MZ interferometer based on dumb-bell-shaped optical fiber structure |
| CN104613889A (en) * | 2015-02-03 | 2015-05-13 | 中国计量学院 | Bending sensing measuring system based on fiber ring laser |
| CN106197305A (en) * | 2016-08-09 | 2016-12-07 | 黄石晨信光电股份有限公司 | A kind of Mach-Zehnder interference type all-fiber crooked sensory device |
| CN106352807A (en) * | 2015-10-13 | 2017-01-25 | 北京信息科技大学 | Method for measuring strain of material on basis of thin-core fiber Mach-Zehnder interferometer |
| CN106524935A (en) * | 2016-10-11 | 2017-03-22 | 北京信息科技大学 | Method for measuring strain of double-pass MZ structure fused with long period fiber grating |
-
2017
- 2017-12-27 CN CN201711444116.4A patent/CN107907070A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5420688A (en) * | 1992-12-14 | 1995-05-30 | Farah; John | Interferometric fiber optic displacement sensor |
| CN103267999A (en) * | 2013-06-01 | 2013-08-28 | 青岛农业大学 | MZ interferometer based on dumb-bell-shaped optical fiber structure |
| CN104613889A (en) * | 2015-02-03 | 2015-05-13 | 中国计量学院 | Bending sensing measuring system based on fiber ring laser |
| CN106352807A (en) * | 2015-10-13 | 2017-01-25 | 北京信息科技大学 | Method for measuring strain of material on basis of thin-core fiber Mach-Zehnder interferometer |
| CN106197305A (en) * | 2016-08-09 | 2016-12-07 | 黄石晨信光电股份有限公司 | A kind of Mach-Zehnder interference type all-fiber crooked sensory device |
| CN106524935A (en) * | 2016-10-11 | 2017-03-22 | 北京信息科技大学 | Method for measuring strain of double-pass MZ structure fused with long period fiber grating |
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| 邵敏: "《光纤折射率与湿度传感器》", 31 August 2015 * |
Cited By (1)
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| CN109632132A (en) * | 2018-12-27 | 2019-04-16 | 北京信息科技大学 | Thermometry based on FBG-FP structured optical fiber laser |
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