CN205785514U - All-fiber power measurement system for high-power fiber laser - Google Patents
All-fiber power measurement system for high-power fiber laser Download PDFInfo
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- CN205785514U CN205785514U CN201620626539.2U CN201620626539U CN205785514U CN 205785514 U CN205785514 U CN 205785514U CN 201620626539 U CN201620626539 U CN 201620626539U CN 205785514 U CN205785514 U CN 205785514U
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- 239000000835 fiber Substances 0.000 title claims abstract description 38
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- 238000010168 coupling process Methods 0.000 claims abstract description 29
- 238000005859 coupling reaction Methods 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims abstract description 21
- 239000011248 coating agent Substances 0.000 claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 18
- 230000003287 optical effect Effects 0.000 claims abstract description 12
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- 238000012360 testing method Methods 0.000 claims description 8
- 238000005538 encapsulation Methods 0.000 claims description 3
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- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The utility model discloses an all-fiber power measurement system for high power fiber laser aims at solving the problem that traditional measurement system structure is complicated, easily makes output beam quality degradation. The utility model discloses an output optic fibre, light energy sampling unit, photoelectric detector, data acquisition unit, data processing unit and the display element that link to each other with waiting to measure the fiber laser. The optical energy sampling unit comprises a coupling optical fiber; the output fiber has a first uncoated region and the coupling fiber has a second uncoated region; the first coating removing area and the second coating removing area are fixed by optical cement to form a light energy coupling area; and part of light energy in the output optical fiber is transferred to the coupling optical fiber through the light energy coupling area, so that light energy sampling is realized. The photoelectric detector is used for detecting the output signal of the coupling optical fiber; the data acquisition unit is used for acquiring an output signal of the photoelectric detector; the data processing unit is used for obtaining the output power of the fiber laser to be measured; the display unit is used for displaying the output power.
Description
Technical field
This utility model belongs to field of photodetection, relates to a kind of all-fiber power for high-capacity optical fiber laser and surveys
Amount system.
Background technology
At present, high-capacity optical fiber laser is as a kind of New Solid laser instrument, because its conversion efficiency is high, beam quality
Good, compact conformation also can export the feature such as high-power and be widely used in industrial processes, 3D printing, laser medicine and military affairs state
The field such as anti-.In actual applications, it is heated and the impact such as working environment, high power light due to the drift of pumping source temperature, gain fibre
Fibre laser output is typically unstable.Therefore, either at general industry processing, 3D printing or laser medicine etc.
Field is required for the output to optical fiber laser and carries out on-line monitoring.
General laser output power On-line Measuring Method is to use light-splitting device to carry out spectroscopic measurements, i.e. from output
Sampling, then measures sampling part.The sampling method that conventional high power fibre laser power is measured is generally divided into two kinds:
Use space discrete device (such as spectroscope) and optical fiber inserter instrument (such as beam splitter).Use the sampling method of space discrete device
The high light splitting score light microscopic of middle use needs space to debug, and reduces the mechanical stability of optical fiber laser, and make difficulty,
Relatively costly.Additionally, the beam quality that spectroscopical thermal lensing effect can make Output of laser deteriorates.Use fiber optic splitter
Though sampling method has higher mechanical stability, but the insertion of fiber optic splitter can produce perturbation to fibre-optic waveguide structure, draws
Send out Mode Coupling, and then cause beam quality to deteriorate；The destruction of waveguiding structure integrity will be caused optical fiber to be sent out by fiber optic splitter
Heat, affects whole system safety；It addition, the fiber optic splitter of relatively low splitting ratio can reduce the output of system, and high score
The fiber optic splitter of beam ratio is but difficult to make.Therefore, in Practical Projectization is applied, traditional on-line monitoring laser output power
Method, structure is complicated, cost high, safety coefficient is low, is not appropriate for carrying out high-capacity optical fiber laser output in real time
On-line monitoring, so it is significant to design more effective on-line measurement system.
Utility model content
In order to solve, tradition on-line monitoring laser output power structure present in above-mentioned background technology is complicated, easily make output swash
The problem of light beam quality deterioration, this utility model provides a kind of all-fiber power measurement for high-capacity optical fiber laser
System.
Technical solution of the present utility model is:
A kind of all-fiber power measuring system for high-capacity optical fiber laser, including output optical fibre, light energy sampling
Unit, photodetector, data acquisition unit, data processing unit and display unit；Described output optical fibre swashs with testing fiber
Light device is connected；Described data acquisition unit is for gathering the output signal of photodetector；Described data processing unit is used for obtaining
Obtain the output power value of testing fiber laser instrument；Described display unit is for showing the output power value of testing fiber laser instrument.
It is characterized in that
Described light energy sampling unit includes coupling optical fiber；
Described output optical fibre has first and goes to coating area, described coupling optical fiber to have second to go to coating area；Described first goes
Coating area and second goes to coating area to use optical cement to fix, and forms light energy coupled zone；Part luminous energy in described output optical fibre
Measure and transfer to described coupling optical fiber transmits by described light energy coupled zone, it is achieved light energy samples；
Described photodetector is positioned at the outfan of coupling optical fiber, for detecting the optical signal that coupling optical fiber is exported.
Based on above-mentioned basic technical scheme, this utility model can be made and being optimized as follows:
For strengthening the coupling sampling effect of coupling optical fiber, the second of above-mentioned coupling optical fiber goes to coating area to be tapered fiber, its
The uniform parts of taper and second goes to coating area to use optical cement to fix.
Above-mentioned output optical fibre and coupling optical fiber use package casing encapsulation fixing in light energy coupled zone, to strengthen power survey
The stability of amount system.
The utility model has the advantages that:
1, light energy sampling unit of the present utility model uses all optical fibre structure, utilizes fast travelling waves of optical fibre to couple, will be few
Fraction of laser light energy is transferred to couple optical fiber from output optical fibre and is transmitted, and the method is without inserting beam splitter or at emitting light path
Upper insertion optics, does not destroy all optical fibre structure of optical fiber laser, it is to avoid Output of laser causes unnecessary disturbance,
The noiseless on-line measurement to high power optical fibre laser can be realized.
2, this utility model need not bear Irradiation of High, without laser damage threshold problem, can be used for high power, high energy
The optical-fiber laser sampling of amount and on-line monitoring.
3, this utility model simple in construction, safe and reliable, with low cost, it is easy to implement.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of online power measuring system of the present utility model；
Fig. 2 is that light energy of the present utility model samples schematic diagram.
Detailed description of the invention
As it is shown in figure 1, all-fiber power measuring system for high-capacity optical fiber laser provided by the utility model
Including output optical fibre, light energy sampling unit, photodetector, data acquisition unit and data processing unit and display unit.
Output optical fibre 2 is connected with high-capacity optical fiber laser 1；Carry out one section of region of certain position of output optical fibre 2 being coated with
Cover process, form first and go to coating area 11.
Light energy sampling unit 3 includes coupling optical fiber 6；One section of region of certain position of coupling optical fiber 6 is carried out coating
Process, form second and go to coating area 12.
First goes to coating area 11 and second to go to coating area 12 to use optical cement fixing formation light energy coupled zone 13.For entering one
Step strengthens the stability output optical fibre 2 of power measuring system and couples optical fiber 6 after light energy coupled zone 13 optical cement is fixing
Use package casing encapsulation fixing again.
The interference inserted due to defect, fused fiber splice and the optical fibre device of optic fibre manufacture process, when laser is at output light
In fine 2 during transmission, mainly transmitting with core mode 9, fraction of laser light can be coupled in covering form cladding mode 10 and transmit.Therefore
When first goes to coating area 11 and second go to coating area 12 close or be close to, with the part of cladding mode 10 transmission in Output of laser
Light energy can be transferred to couple in optical fiber 6 and transmit, thus realizes light energy sampling.
The length of light energy coupled zone 13 is by the ginseng of two optical fiber in light energy coupled zone 13 (output optical fibre and coupling optical fiber)
Number, close distance and expection coupling efficiency determine.The a length of 1cm of light energy coupled zone 13 in the present embodiment.
Photodetector 5 is positioned at the outfan of coupling optical fiber 6, for detecting the optical signal that coupling optical fiber 6 is exported, and will
The optical signal detected is converted to signal of telecommunication output；
Data acquisition unit 7 is connected with photodetector 5, for gathering the output signal of photodetector 5.The present embodiment
Data acquisition unit 7 be made up of pre-amplification circuit and A/D change-over circuit, use pre-amplification circuit to photodetector 5
Output signal be amplified, then utilize A/D change-over circuit that the signal after being amplified is carried out data acquisition.
Data processing unit 8 is for obtaining the output power value of testing fiber laser instrument.
Display unit 14 is for showing the output power value of testing fiber laser instrument.
Using power measuring system provided by the utility model, the power of optical fiber laser 1 is carried out on-line monitoring
Before, need to demarcation prior to this utility model, concrete scaling method is:
1, the outfan at output optical fibre 2 arranges energy meter, for measuring the output of high-capacity optical fiber laser 1.
2, the linear relationship of the output signal (voltage etc.) of photodetector and the output of optical fiber laser is carried out
Demarcate (i.e. power measuring system being demarcated):
2.1 data acquisition units gather the output signal of high-capacity optical fiber laser 1 and the defeated of photodetector
Go out signal；
The signal that data acquisition unit in above-mentioned steps 2.1 is obtained by 2.2 data processing units processes, and obtains light
Corresponding relation between output signal (voltage etc.) and the output of high-capacity optical fiber laser 1 of electric explorer 5.
After demarcating power measuring system of the present utility model according to the method described above, data processing unit is according to photodetection
Corresponding relation between output signal (voltage etc.) and the output of high-capacity optical fiber laser 1 of device 5 obtains high power light
The output power value of fibre laser 1, shows measurement result simultaneously, it is achieved the reality of high-capacity optical fiber laser output
Time on-line measurement.
Claims (3)
1. for an all-fiber power measuring system for high-capacity optical fiber laser, including output optical fibre, light energy sampling list
Unit, photodetector, data acquisition unit, data processing unit and display unit；Described output optical fibre and testing fiber laser
Device is connected；Described data acquisition unit is for gathering the output signal of photodetector；Described data processing unit is used for obtaining
The output power value of testing fiber laser instrument；Described display unit is for showing the output power value of testing fiber laser instrument；
It is characterized in that:
Described light energy sampling unit includes coupling optical fiber；
Described output optical fibre has first and goes to coating area, described coupling optical fiber to have second to go to coating area；Described first goes coating
District and second goes to coating area to use optical cement to fix, and forms light energy coupled zone；Part light energy in described output optical fibre is led to
Cross described light energy coupled zone to transfer to described coupling optical fiber transmits, it is achieved light energy samples；
Described photodetector is positioned at the outfan of coupling optical fiber, for detecting the optical signal that coupling optical fiber is exported.
A kind of all-fiber power measuring system for high-capacity optical fiber laser the most according to claim 1, its feature
It is: the second of described coupling optical fiber goes to coating area to be tapered fiber, and the uniform parts of its taper and second goes to coating area to use
Optical cement is fixed.
A kind of all-fiber power measuring system for high-capacity optical fiber laser the most according to claim 1 and 2, it is special
Levy and be: described output optical fibre and coupling optical fiber use in light energy coupled zone package casing encapsulation fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620626539.2U CN205785514U (en) | 2016-06-22 | 2016-06-22 | All-fiber power measurement system for high-power fiber laser |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620626539.2U CN205785514U (en) | 2016-06-22 | 2016-06-22 | All-fiber power measurement system for high-power fiber laser |
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| CN205785514U true CN205785514U (en) | 2016-12-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525583A (en) * | 2016-06-22 | 2017-12-29 | 中国科学院西安光学精密机械研究所 | All-fiber power measurement system for high-power fiber laser |
| CN108318135A (en) * | 2018-01-17 | 2018-07-24 | 长春理工大学 | A kind of optical-fiber laser on-line monitoring system |
| CN110455495A (en) * | 2019-07-31 | 2019-11-15 | 华中科技大学鄂州工业技术研究院 | A kind of optical fiber laser mode stability detection device and method |
-
2016
- 2016-06-22 CN CN201620626539.2U patent/CN205785514U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107525583A (en) * | 2016-06-22 | 2017-12-29 | 中国科学院西安光学精密机械研究所 | All-fiber power measurement system for high-power fiber laser |
| CN108318135A (en) * | 2018-01-17 | 2018-07-24 | 长春理工大学 | A kind of optical-fiber laser on-line monitoring system |
| CN110455495A (en) * | 2019-07-31 | 2019-11-15 | 华中科技大学鄂州工业技术研究院 | A kind of optical fiber laser mode stability detection device and method |
| CN110455495B (en) * | 2019-07-31 | 2021-05-11 | 华中科技大学鄂州工业技术研究院 | Fiber laser mode stability detection device and method |
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