CN207170420U - A kind of adjustable pulse width optical-fiber laser rust remover - Google Patents
A kind of adjustable pulse width optical-fiber laser rust remover Download PDFInfo
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- CN207170420U CN207170420U CN201720945961.9U CN201720945961U CN207170420U CN 207170420 U CN207170420 U CN 207170420U CN 201720945961 U CN201720945961 U CN 201720945961U CN 207170420 U CN207170420 U CN 207170420U
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Abstract
The utility model provides a kind of adjustable pulse width optical-fiber laser rust remover.Include laser, optical launcher, power-supply controller of electric.Wherein, laser component regulates and controls the time delay of two acousto-optic modulators, wherein switching device of the first sound-optic modulator as linear impulsive Q adjusting optical fiber laser, Q adjusting optical fiber laser output high-power wide laser pulse using programmable delay circuit；Second sound-optic modulator is realized as photoswitch cuts slicing to output laser pulse, controls the delay time of second sound-optic modulator, can obtain the laser output of adjustable pulse width.Pulsed optical signals so after alliteration optical modulator adjusting pulsewidth effectively amplify through fiber amplifier, obtain high power laser light output, laser pulse width is adjustable, simple in construction.Emitting portion is controlled to be transmitted into after laser alignment through galvanometer on workpiece to be derusted.
Description
Technical field
Field of laser device technology is the utility model is related to, is specifically related to a kind of adjustable pulse width optical-fiber laser rust remover
Background technology
Away rust by laser, compared to the derusting means for playing traditional chemical formula, has as a kind of emerging derusting, cleaning procedure
Non-environmental-pollution, many advantages, such as rust cleaning efficiency is high.General principle is the light pulse using laser high-peak power by surface
Oxide layer or pollution layer are absorbed, and are produced the plasma drastically expanded, are then produced shock wave, and oxide layer or pollutant are become
Fragmentate and reject.For this technique, there are two threshold values, one is oxide layer or the removal threshold value of pollutant, is less than
This threshold value, derusting or cleaning can not be completed；Another is base material damage threshold itself, higher than this threshold value, substrate
Material can be also destroyed in itself.
For different materials, the data of this two classes threshold value are also not quite similar, and this is new by the way of adjustable pulse width, for
Different base material, oxide layer or pollutants, the energy of laser is set both can effectively to be removed just between two threshold values
Pollutant, damage will not be produced to base material again.
The content of the invention
For the above, the utility model provides a kind of adjustable pulse width optical-fiber laser rust remover, passes through alliteration light modulation
After device adjusting pulsewidth, amplify through fiber amplifier MOPA, obtain high-power laser output, and laser pulse width is adjustable, laser
Simple in construction, production cost is relatively low.
A kind of adjustable pulse width optical-fiber laser rust remover, including laser, optical launcher, power-supply controller of electric, laser by
Oscillator and amplifier are formed；
Oscillator section includes the pumping source semiconductor laser, optical-fiber bundling device, high anti-optical fiber Bragg being sequentially connected
Grating, gain fibre, first sound-optic modulator AOM, low anti-Fiber Bragg Grating FBG, cladding light stripper, the second acousto-optic modulation
Device AOM；
Fiber amplifier part is first stage amplifier or casacade multi-amplifier, is passed through between the adjacent amplifier of casacade multi-amplifier
Fibre optic isolater connects, and outermost first stage amplifier connects a fibre optic isolater；Every grade of amplifier includes amplifier pumping source
Semiconductor laser, amplifier optical fiber bundling device, amplifier laser gain fibre and amplifier cladding light stripper；
Optical launcher includes laser alignment mirror in cover cylinder on main optical path and laser galvanometer, and the laser after collimating mirror collimates is transmitted into through laser galvanometer
On workpiece to be derusted.
Power control part, the control circuit part include connection pumping source semiconductor laser and drive its luminous
The first sound-optic modulator driving of pumping source driving circuit, modulation first sound-optic modulator AOM open and-shut mode and switching frequency
Circuit, modulation second sound-optic modulator AOM open and-shut mode and switching frequency second sound-optic modulator drive circuit, control respectively
First sound-optic modulator drive circuit and second sound-optic modulator drive circuit processed, so as to modulate first sound-optic modulator and second
Delay circuit, connection amplifier pumping source group and the driving amplifier pumping source group of time delay between acousto-optic modulator lights
Amplifier pumping source driving circuit, control respectively the pumping source driving circuit, delay circuit and amplifier pumping source driving
The control circuit of circuit, the drive circuit for controlling laser galvanometer.
Further, the pump mode of the laser is forward pumping, backward pumping or two directional pump.
Further, it is 1-100ns to regulate and control second sound-optic modulator to drive time delay by delay circuit.
Further, the hot spot of laser is less than the 2/3 of laser vibration mirror reflected mirror size after laser alignment mirror in cover cylinder on main optical path collimation.
Further, collimating mirror laser galvanometer is to 1064nm laser reflectivities>99.5%.
Brief description of the drawings
Fig. 1 is the adjustable pulse width optical-fiber laser rust remover structural representation of the embodiment of the present invention 1；
1 power-supply controller of electric
Pumping source semiconductor laser device driving circuit is swung in 2 principal earthquakes
3 pumping source semiconductor lasers
Optical-fiber bundling device is swung in 4 principal earthquakes
Gain fibre is swung in 5 principal earthquakes
6 high anti-Fiber Bragg Grating FBGs
7 first sound-optic modulator AOM
8 first sound-optic modulator drive circuits
9 delay circuits
10 low anti-Fiber Bragg Grating FBGs
11 second sound-optic modulator AOM
12 second sound-optic modulator drive circuits
13 fibre optic isolaters
14 amplifier pumping source semiconductor laser groups
15 amplifier pumping source semiconductor laser device driving circuits
16 amplifier optical fiber bundling devices
17 amplifier gain fibers
18 amplifier cladding light strippers
19 laser alignment mirror in cover cylinder on main optical path
20 laser galvanometers
21 laser galvanometer drive circuits
Embodiment：
Embodiment 1：
The structural representation of embodiment 1 is as shown in figure 1, a kind of adjustable pulse width optical-fiber laser rust remover, including laser, light
Transmitter, power-supply controller of electric are learned, laser is made up of oscillator and amplifier；The primary oscillator section includes what is be sequentially connected
Pumping source semiconductor laser, optical-fiber bundling device, high anti-Fiber Bragg Grating FBG, gain fibre, first sound-optic modulator AOM,
Low anti-Fiber Bragg Grating FBG, cladding light stripper, second sound-optic modulator AOM；Put for one-level the fiber amplifier part
Big device, isolated between master oscillator using isolator；Amplifier includes pumping source semiconductor laser, amplifier optical fiber closes beam
Device and amplifier gain fiber, amplifier cladding light stripper；Optical launcher includes laser alignment mirror in cover cylinder on main optical path and laser galvanometer, collimation
Laser spot diameter after mirror collimation is 5mm, and laser galvanometer lens dimension is 8mm, and laser galvanometer is to 1064nm laser reflectivities>
99.5%；Control circuit part, the power control circuit part include connection pumping source and drive pumping source semiconductor laser
First acousto-optic of the luminous pumping source driving circuit of device, modulation first sound-optic modulator AOM open and-shut mode and switching frequency is adjusted
Device drive circuit, modulation second sound-optic modulator AOM open and-shut mode and the second sound-optic modulator driving electricity of switching frequency processed
Road, first sound-optic modulator drive circuit and second sound-optic modulator drive circuit are controlled respectively, adjusted so as to modulate the first acousto-optic
The delay circuit of time delay between device and second sound-optic modulator processed, connect amplifier pumping source semiconductor laser group simultaneously
The luminous amplifier pumping source driving circuit of driving amplifier pumping source group, the pumping source driving circuit, delay are controlled respectively
The control circuit of circuit and amplifier pumping source driving circuit, control the drive circuit of laser galvanometer.Regulated and controled using delay circuit
The derailing switch of the time delay of two acousto-optic modulators, wherein first sound-optic modulator as linear impulsive Q adjusting optical fiber laser
Part, Q adjusting optical fiber laser output high-power wide laser pulse；Second sound-optic modulator is realized to exporting laser arteries and veins as photoswitch
Be punched clipping ripple, control second sound-optic modulator relative to Q adjusting optical fiber laser master oscillator output laser pulse delay when
Between, the laser output of adjustable pulse width can be obtained.After laser quasi, in the presence of laser galvanometer drive circuit is controlled, laser shakes
Mirror in a fixed order, scans in the enterprising row order of workpiece to be cleaned.
Preferably, delay circuit is programmable delay circuit, and such pulse width can accurately be controlled by program.
The working method of the MOPA optical fiber lasers of adjustable pulse width described in embodiment 1 is：
Pumping source semiconductor laser is a kind of fiber coupled laser diode, is gain medium (gain fibre)
Energy is provided.Control circuit controls pumping source driving circuit, delay circuit and amplifier pumping source driving circuit respectively.Pumping
Source driving circuit connects pumping source, and driving pumping source lights；The TTL signal that delay circuit is sent control circuit by chip enters
Line delay processing, two TTL signals with delay are sent, control first sound-optic modulator drive circuit and the second acousto-optic respectively
Modulator driver circuit, so as to modulate the time delay between first sound-optic modulator and second sound-optic modulator；First, second
Acousto-optic modulator drive circuit modulates the open and-shut mode and switching frequency of respective acousto-optic modulator AOM (Q-switch).High reflective fibre
Bragg grating has characteristic thoroughly, anti-to flashlight height high to pump light.High anti-Fiber Bragg Grating FBG, gain medium
(doped fiber), optical-fiber bundling device, first sound-optic modulator and low anti-Fiber Bragg Grating FBG collectively form linear tune Q optical fiber
The optical resonator of laser.The active ions that the light that pumping source is sent is adulterated after doped fiber in optical fiber absorb, shape
Into population inversion.When Q-switch is closed, the oscillation threshold of laser is very high, and laser generation can not be produced in resonator；Work as tune
When Q-switch is opened, laser generation is established rapidly, and caused laser is exported by output grating (low anti-Fiber Bragg Grating FBG).It is defeated
It is relevant to go out the pulse width of the laser and length of resonator, the loss of acoustooptic switch and resonator.It is linear by changing in theory
The length export structure pulse width of resonator can be up to more than Millisecond, but the pulse width within 100ns is sufficient for
Actual clean applications requirement.The relative first acousto-optic driver delay of second sound-optic modulator driving is adjusted by regulating and controlling delay circuit
1-100ns, the laser pulse of output clipped wave, the pulse width of output after second sound-optic modulator narrow.What is obtained is narrow
Pulse width laser is effectively amplified after fibre optic isolater by follow-up fiber amplifier, and the pulse laser of amplification is through fibre optic isolater
Output.Fibre optic isolater can effectively prevent the influence of reflected light, the time delay that modulation second sound-optic modulator is opened, can be with
The laser pulse of distinct pulse widths is obtained, pulse width can accurately be controlled by program.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, any modification, equivalent substitution and improvements made etc., it should be included within the scope of protection of the utility model.
Claims (4)
- A kind of 1. adjustable pulse width optical-fiber laser rust remover, it is characterised in that：Including laser, optical launcher and power supply Device, laser are made up of oscillator and amplifier；Pumping source semiconductor laser that oscillator section includes being sequentially connected, optical-fiber bundling device, high anti-Fiber Bragg Grating FBG, Gain fibre, first sound-optic modulator AOM, low anti-Fiber Bragg Grating FBG, cladding light stripper, second sound-optic modulator AOM；Fiber amplifier part is first stage amplifier or casacade multi-amplifier, passes through optical fiber between the adjacent amplifier of casacade multi-amplifier Isolator connects, and outermost first stage amplifier connects a fibre optic isolater；Every grade of amplifier is partly led including amplifier pumping source Body laser, amplifier optical fiber bundling device, amplifier laser gain fibre, amplifier cladding light stripper；Optical launcher includes laser alignment mirror in cover cylinder on main optical path and laser galvanometer, and the laser after collimating mirror collimation is transmitted into through laser galvanometer to be waited to remove Become rusty on workpiece；Power control part, the control circuit part include connection pumping source semiconductor laser and drive its luminous pumping Source driving circuit, modulation first sound-optic modulator AOM open and-shut mode and switching frequency first sound-optic modulator drive circuit, Modulation second sound-optic modulator AOM open and-shut mode and the second sound-optic modulator drive circuit of switching frequency, the is controlled respectively One acousto-optic modulator drive circuit and second sound-optic modulator drive circuit, so as to modulate first sound-optic modulator and the second acousto-optic What delay circuit, connection amplifier pumping source group and the driving amplifier pumping source group of the time delay between modulator lighted puts Big device pumping source driving circuit, the pumping source driving circuit, delay circuit and amplifier pumping source driving circuit are controlled respectively Control circuit, control laser galvanometer drive circuit.
- A kind of 2. adjustable pulse width optical-fiber laser rust remover according to claim 1, it is characterised in that：The pumping of the laser Mode is forward pumping, backward pumping or two directional pump.
- A kind of 3. adjustable pulse width optical-fiber laser rust remover according to claim 1, it is characterised in that：Laser alignment mirror in cover cylinder on main optical path collimates The hot spot of laser is less than the 2/3 of laser vibration mirror reflected mirror size afterwards.
- A kind of 4. adjustable pulse width optical-fiber laser rust remover according to claim 1, it is characterised in that：Collimating mirror laser shakes Mirror is to 1064nm laser reflectivities>99.5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720945961.9U CN207170420U (en) | 2017-07-31 | 2017-07-31 | A kind of adjustable pulse width optical-fiber laser rust remover |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720945961.9U CN207170420U (en) | 2017-07-31 | 2017-07-31 | A kind of adjustable pulse width optical-fiber laser rust remover |
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| CN207170420U true CN207170420U (en) | 2018-04-03 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108838545A (en) * | 2018-07-18 | 2018-11-20 | 张家港市顶峰激光科技有限公司 | A kind of derusting device of portable semiconductor laser to metal surface |
| CN108923233A (en) * | 2018-08-16 | 2018-11-30 | 深圳番越光电有限公司 | A kind of high energy all -fiber nanosecond laser for away rust by laser |
| CN108963736A (en) * | 2018-08-16 | 2018-12-07 | 深圳番越光电有限公司 | A kind of high-peak power picosecond and nanosecond short-wavelength light fibre laser |
| CN111106513A (en) * | 2019-12-12 | 2020-05-05 | 北京航天控制仪器研究所 | Narrow nanosecond initiative Q-switched fiber laser |
| CN111370985A (en) * | 2020-03-12 | 2020-07-03 | 北京航天控制仪器研究所 | Pulse width adjusting system of active Q-switched optical fiber laser |
| CN111992544A (en) * | 2020-08-24 | 2020-11-27 | 中国科学院半导体研究所 | Acousto-optic Q double-pulse laser paint removing method |
| CN114472374A (en) * | 2022-03-02 | 2022-05-13 | 中铁上海工程局集团有限公司 | New energy steel rail laser rust removal equipment and method thereof |
| CN115415673A (en) * | 2022-09-15 | 2022-12-02 | 浙江金洲激光科技有限公司 | Kilowatt-level high-power laser cleaning equipment |
-
2017
- 2017-07-31 CN CN201720945961.9U patent/CN207170420U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108838545A (en) * | 2018-07-18 | 2018-11-20 | 张家港市顶峰激光科技有限公司 | A kind of derusting device of portable semiconductor laser to metal surface |
| CN108923233A (en) * | 2018-08-16 | 2018-11-30 | 深圳番越光电有限公司 | A kind of high energy all -fiber nanosecond laser for away rust by laser |
| CN108963736A (en) * | 2018-08-16 | 2018-12-07 | 深圳番越光电有限公司 | A kind of high-peak power picosecond and nanosecond short-wavelength light fibre laser |
| CN108923233B (en) * | 2018-08-16 | 2019-12-06 | 深圳番越光电有限公司 | Large pulse energy all-fiber nanosecond laser for laser rust removal |
| CN111106513A (en) * | 2019-12-12 | 2020-05-05 | 北京航天控制仪器研究所 | Narrow nanosecond initiative Q-switched fiber laser |
| CN111370985A (en) * | 2020-03-12 | 2020-07-03 | 北京航天控制仪器研究所 | Pulse width adjusting system of active Q-switched optical fiber laser |
| CN111992544A (en) * | 2020-08-24 | 2020-11-27 | 中国科学院半导体研究所 | Acousto-optic Q double-pulse laser paint removing method |
| CN111992544B (en) * | 2020-08-24 | 2022-07-26 | 中国科学院半导体研究所 | Acousto-optic Q double-pulse laser paint removing method |
| CN114472374A (en) * | 2022-03-02 | 2022-05-13 | 中铁上海工程局集团有限公司 | New energy steel rail laser rust removal equipment and method thereof |
| CN115415673A (en) * | 2022-09-15 | 2022-12-02 | 浙江金洲激光科技有限公司 | Kilowatt-level high-power laser cleaning equipment |
| CN115415673B (en) * | 2022-09-15 | 2023-11-14 | 浙江金洲激光科技有限公司 | Kilowatt-level high-power laser cleaning equipment |
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