CN203326345U - Optical fiber laser device - Google Patents
Optical fiber laser device Download PDFInfo
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- CN203326345U CN203326345U CN2013201851878U CN201320185187U CN203326345U CN 203326345 U CN203326345 U CN 203326345U CN 2013201851878 U CN2013201851878 U CN 2013201851878U CN 201320185187 U CN201320185187 U CN 201320185187U CN 203326345 U CN203326345 U CN 203326345U
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Abstract
The utility model discloses an optical fiber laser device, which comprises a first pump light source, a high-reflection fiber grating, a first gain fiber, a low-reflection fiber grating, an isolator, a second gain fiber and a second pump light source, wherein the first pump light source generates pulse pump light after being modulated by a driving power supply quickly, the high-reflection fiber grating and the low-reflection fiber grating form a laser cavity, the first gain fiber absorbs the pulse pump light and then outputs a laser pump waveform with a front sharp and protruded edge and a rear flat top, the laser pump waveform is amplified by a laser amplifier formed by the second gain fiber and the second pump light source, and the laser pump waveform with a front edge high-peak-power peak and a rear flat top section is output. Tests prove that the device is applicable to micro-cutting of metal and semiconductor materials and capable of improving the cutting and chamfering speed.
Description
Technical field
The utility model relates to fiber laser, a kind of fiber laser of exporting special waveform particularly, can export the laser pulse shape of forward position high-peak power spike and rear flat-top section, be applicable to metal, the micro-cutting of semi-conducting material, can improve cutting or grooving speed.
Background technology
Along with the development of laser technology and laser application technique, laser is as a kind of energy material machining tool, more and more extensive in the application in industrial processes field.Wherein, laser welding and cutting are application the most representative in Laser applications in industry.
For turn to the laser cutting parameter of main process with hot melt, be generally used for metal species materials processing, generally adopt the high pressure assist gas at first to produce puncturing hole in conjunction with the high-peak power laser pulse in the cutting starting point, and then carry out the hot melt cutting with high-average power continuous laser or macro-energy pulse laser.If adopt two pulse lasers to complete this process, not only holistic cost is higher, and needs additional devices to control on two laser time synchronized, and serious forgiveness is lower.
To be vaporizated into the laser cutting parameter of main process, it is the derivative application that laser cutting is new, multiplex in the grooving of metal material surface laser or dark carving, rely on the high-peak power high pulse energy of laser pulse that the material direct boiling is processed, but tend to occur rapid phase transition after the material vaporization and form some residues, affect working (machining) efficiency and effect, therefore often need the extra technique such as heating or pickling to be cleaned, complex process.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, the fiber laser of output special waveform is provided, the laser pulse shape of this fiber laser output forward position high-peak power spike and rear flat-top section, be conducive to, to metal, the micro-cutting of semi-conducting material, improve cutting or grooving speed.
In an optical pulse waveform, there are high-peak power spike section and flat-top section simultaneously, guarantee in the whole course of processing process that comprises spike puncture, flat-top hot melt in the hot melt cutting process; In the vaporization cutting process, flat-top section energy heated volatile vaporization residue, improve cutting or grooving speed.
Technical solution of the present utility model is as follows:
A kind of fiber laser of exporting special waveform, characteristics are that its formation comprises successively: the first pump light source, high reflection fiber grating, the first gain fibre, the fine grating of low light reflectivity, isolator, the second gain fibre and the second pump light source, the fine optical grating constitution laserresonator of described high reflection fiber grating and low light reflectivity, the output of driving power is connected with the drive end of described the first pump light source, the second pump light source.
Described laser gain optical fiber is to mix Yb
3+, Er
3+, Tm
3+Laser fiber.
The first pumping source light source is and the first gain fibre that the second pumping source light source is semiconductor laser, fiber laser or the solid state laser be complementary with the second gain fibre absorption line.
Operation principle of the present utility model is as follows:
Three sections of the flat-top section that the drive current that described driving power is exported the first pump light source comprises fast rise forward position, constant peak value and trailing edges, rising front be greater than 1 peace doubly/speed of microsecond arrives and sets current peak, the flat-top section retention time is greater than 1 microsecond, and the first gain fibre absorbs the laser waveform rear pump Pu light of the prominent rear flat-top of forward position point obtained after the pump light of the first pumping source.
After the first gain fibre absorbs the pulse pump light of the first pump light source, form the particle reversion in laser cavity.Pulse pump light injects and has just started in extremely short a period of time, because pumping rate is very high, the inverted population of upper laser level run-up is considerably beyond the inverted population of threshold level, laser generation occurs, a large amount of upper energy level particles are depleted to rapidly lower energy level, gain simultaneously is less than loss, forms spike output.
The speed that pumping pulse is risen is faster, and the spike of the pulsed light of output is higher.
In the pumping pulse peak value section of holding time, pump light continues to provide energy, but pumping rate is lower, makes inverted population again to reach near threshold level, obtains the square-topped pulse output of low peak power.
Technique effect of the present utility model is as follows:
1, the utility model can obtain the laser pulse output waveform that high-peak power spike section and low-power flat-top section coexist, experiment shows the laser pulse shape of this forward position high-peak power spike and rear flat-top section, be conducive to, to metal, the micro-cutting of semi-conducting material, improve cutting or grooving speed;
2, adjust climbing speed and the peak value of the pumping current of described driving power, speed is faster, and peak value is higher, and the light pulse peak amplitude of output is higher;
3, laser output frequency is accurately controlled by driving power.
The accompanying drawing explanation
Fig. 1 is the structural representation of the fiber laser embodiment of the utility model output special waveform
Fig. 2 is the pumping current pulse of driving power output of fiber laser embodiment of this output special waveform and the light pulse schematic diagram of the first pump light source output
Fig. 3 is the schematic diagram of output optical pulse sequence of the fiber laser embodiment of output special waveform
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but should not limit protection range of the present utility model with this.
Embodiment
Refer to Fig. 1, as seen from the figure, the fiber laser of the utility model output special waveform, form and comprise successively: driving power 1, the first pump light source 2, high reflection fiber grating 3, the first gain fibre 4, the fine grating 5 of low light reflectivity, isolator 6, the second gain fibre 7 and the second pump light source 8, the fine grating 5 of described high reflection fiber grating 3 and low light reflectivity forms laserresonator, and the output of driving power 1 is connected with the drive end of described the first pump light source 2, the second pump light source 8.
The drive current of described driving power 1 output comprises the fast rise edge, the flat-top section of constant peak value, trailing edge, the forward position climbing speed be greater than 1 peace doubly/microsecond, to setting current peak, the flat-top section retention time is greater than 1 microsecond, and the first pump light source 2 is driven.
The first gain fibre 4 absorbs the Laser output obtained after the pump light of the first pump light source 2, obtains and amplifies after the pump light of second gain fibre 7 absorption the second pump light sources 8, the laser pulse shape of output forward position high-peak power spike and rear flat-top section.
The first pump light source 2, the second pump light source 8 output wavelength 915nm of the fiber laser embodiment of the utility model output special waveform, power is 50W, 3 pairs of 1064nm laser reflectivities of high reflection fiber grating > 99.7%, to the transmitance of 915nm pump light > 99.5%.The fibre core that the reflectivity of 5 pairs of 1064nm laser of the fine grating of low light reflectivity is 10%, the first gain fibre 4 is 10um, and the fibre core of the second gain fibre 7 is 20um.The climbing speed of the drive current to the first pump light source 2 of described driving power 1 output be 5 amperes every delicate, current spike duration 100 microsecond, the pumping current pulse as shown in Figure 2, the first pump light source 2 is after the current impulse modulation of described driving power 1, output pulse pump light, the first gain fibre 4 absorbs 915nm pump light, output pulse signal light; After the 915nm pump light that second gain fibre 7 absorption the second pump light sources 8 are sent, storage power, when flashlight amplifies by acquisition after the second gain fibre 7, the pulse train of power output 30W is as shown in Figure 3.Experiment shows the laser pulse shape of this forward position high-peak power spike and rear flat-top section, is conducive to, to metal, the micro-cutting of semi-conducting material, improve cutting or grooving speed.
The present embodiment scheme is equally applicable to mix Er
3+, Tm
3+Laser gain optical fiber Deng rare earth ion.
Claims (1)
1. a fiber laser, be characterised in that its formation comprises successively: the first pump light source (2), high reflection fiber grating (3), the first gain fibre (4), the fine grating (5) of low light reflectivity, isolator (6), the second gain fibre (7) and the second pump light source (8), the fine grating of described high reflection fiber grating (3) and low light reflectivity (5) forms laserresonator, and the output of driving power (1) is connected with the drive end of described the first pump light source (2), the second pump light source (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201851878U CN203326345U (en) | 2013-04-12 | 2013-04-12 | Optical fiber laser device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201851878U CN203326345U (en) | 2013-04-12 | 2013-04-12 | Optical fiber laser device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326345U true CN203326345U (en) | 2013-12-04 |
Family
ID=49665640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201851878U Expired - Lifetime CN203326345U (en) | 2013-04-12 | 2013-04-12 | Optical fiber laser device |
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| CN (1) | CN203326345U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233159A (en) * | 2018-02-09 | 2018-06-29 | 无锡源清瑞光激光科技有限公司 | Pulse optical fiber based on relaxation effect |
| CN108390246A (en) * | 2018-04-28 | 2018-08-10 | 无锡源清瑞光激光科技有限公司 | A kind of quasi-continuous optical fiber laser of module chemical combination beam |
| CN111541140A (en) * | 2020-04-02 | 2020-08-14 | 山东大学 | Yb-YAG ultrashort pulse laser amplifier based on brightness cascade pump |
| CN112582872A (en) * | 2020-12-10 | 2021-03-30 | 上海飞博激光科技有限公司 | Functional module and method for inhibiting waveform distortion |
-
2013
- 2013-04-12 CN CN2013201851878U patent/CN203326345U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108233159A (en) * | 2018-02-09 | 2018-06-29 | 无锡源清瑞光激光科技有限公司 | Pulse optical fiber based on relaxation effect |
| CN108233159B (en) * | 2018-02-09 | 2019-07-30 | 无锡源清瑞光激光科技有限公司 | Pulse optical fiber based on relaxation effect |
| CN108390246A (en) * | 2018-04-28 | 2018-08-10 | 无锡源清瑞光激光科技有限公司 | A kind of quasi-continuous optical fiber laser of module chemical combination beam |
| CN111541140A (en) * | 2020-04-02 | 2020-08-14 | 山东大学 | Yb-YAG ultrashort pulse laser amplifier based on brightness cascade pump |
| CN112582872A (en) * | 2020-12-10 | 2021-03-30 | 上海飞博激光科技有限公司 | Functional module and method for inhibiting waveform distortion |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131204 |