CN202192371U - Linear polarization pulse fiber laser machining device - Google Patents
Linear polarization pulse fiber laser machining device Download PDFInfo
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- CN202192371U CN202192371U CN 201120205531 CN201120205531U CN202192371U CN 202192371 U CN202192371 U CN 202192371U CN 201120205531 CN201120205531 CN 201120205531 CN 201120205531 U CN201120205531 U CN 201120205531U CN 202192371 U CN202192371 U CN 202192371U
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Abstract
The utility model provides a linear polarization pulse fiber laser machining device, which comprises a linear polarization solid laser device, a plurality of amplification stage units, a polarization dependent collimation isolator, a polarization light splitter and a lambda/4 wave plate. The linear polarization solid laser device is used for generating linear polarization pulse laser, each amplification stage unit comprises a polarization dependent isolator, a pump source, a polarization dependent combiner and a double-clad polarization maintaining fiber, and the polarization dependent collimation isolator, the polarization light splitter and the lambda/4 wave plate are sequentially arranged on one side of a final output end of the amplification stage units, so that the amplified laser outputted from the amplification stage units passes through the polarization dependent collimation isolator, the polarization light splitter and the lambda/4 wave plate and then irradiates on a workpiece. Moreover, after the laser reflected by the workpiece to return along an optical axis passes through the lambda/4 wave plate, the polarization direction of the laser is perpendicular to an original polarization direction, so that the laser is reflected by the polarization light splitter towards the direction perpendicular to the optical axis. According to the structure, the linear polarization pulse fiber laser machining device is high in stability and low in cost, and has the function of reflected light prevention.
Description
Technical field
The utility model relates to a kind of linear polarization pulsed optical fibre laser processing unit (plant) that is used for industrial processes, belongs to laser technology field.
Background technology
Along with development of technologies, laser processing technology has been widely used in industrial circles such as mark, cutting, welding, punching, coating as the representative of modern industry high-tech process technology.Develop in the optical fiber laser of the nineties in last century, with traditional CO
2Laser instrument is compared with solid state laser, have that volume is little, energy consumption is low, beam quality high good, efficient is high, stability is high, characteristics such as non-maintaining, is progressively replacing the status of conventional laser in industrial processes.Wherein, the pulse optical fiber that has high repetition frequency, high-peak power, a high single pulse energy receives much concern at aspects such as Laser Micro-Machining, laser labelling, cut, laser weld.
Yet unsettled seed source amplifies the high energy pulse that can produce non-flashlight through gain fibre, not only bad for processed and applied, also can serious threat comprise seed source, pumping source even safety whole laser-processing system on the contrary.Secondly, in process, can be got into laser instrument, may damage device, even burn optical fiber by the part of the light of surface of the work reflection.Moreover, receiving the higher restriction of Primary Component cost at present, the cost of the industrial pulse optical fiber on the market is also very high, has also limited the popularization of its application.So, need have and can prevent reverberation and the low pulse optical fiber of cost cost in high stability, high light beam quality, the processing.
The utility model content
The utility model is put in view of the above problems and is made, and its purpose is to provide the linear polarization pulsed optical fibre laser processing unit (plant) that is used for industrial processes that a kind of stability is high, cost is low and have antireflection light function.
In order to achieve the above object, the utility model provides a kind of linear polarization pulsed optical fibre laser processing unit (plant), comprising: the linear polarization solid state laser is used to produce the linear polarization pulse laser; A plurality of amplifying stages unit; Be connected the output end of said linear polarization solid state laser; Comprise polarization be correlated with relevant bundling device of isolator, pumping source, polarization and double clad polarization maintaining optical fibre respectively, the linear polarization pulse laser by said linear polarization solid state laser output is amplified; And the polarization relevant collimation isolator, polarizing beam splitter and λ/4 wave plates that are configured in final output one side of said a plurality of amplifying stages unit successively; Make and be radiated on the work piece after relevant collimation isolator, polarizing beam splitter and λ/4 wave plates through said polarization from the laser through amplifying of said a plurality of amplifying stages unit output; And; The laser that is returned along optical axis by said processed object reflection is through after said λ/4 wave plates; Its polarization direction becomes vertical with former polarization direction, thereby is reflected to the direction vertical with optical axis by said polarizing beam splitter.
In addition, preferably, said linear polarization solid state laser comprises linear polarization solid laser module, beam-expanding collimation mirror, condenser lens and the coupling output optical fibre of configuration successively.
In addition, preferably, going into of the relevant isolator of polarization of the first order amplifying unit in the coupling output optical fibre of said linear polarization solid state laser and the said a plurality of amplifying stages unit is fine through drawing the welding of awl method to realize mould field coupling.
Moreover, preferably, adopt the fiber end face welding of mould field coupling between said a plurality of amplifying stages unit.
In addition; Preferably; The pumping input of the relevant bundling device of polarization of a relevant bundling device of the polarization of the previous amplifying stage unit in said a plurality of amplifying stages unit and a back amplifying stage unit is added to fine quantity or improves the single armed pump power according to needed pumping general power.
According to aforesaid the utility model, can realize that stability is high, cost is low and have the linear polarization pulsed optical fibre laser processing unit (plant) that is used for industrial processes of anti-reflective function.
Description of drawings
Fig. 1 is the integrally-built figure of linear polarization pulsed optical fibre laser processing unit (plant) that is used for industrial processes that expression the utility model relates to.
Fig. 2 is the figure of the internal structure of the linear polarization solid state laser 1 in the above-mentioned linear polarization pulsed optical fibre laser processing unit (plant) of expression.
Description of reference numerals:
1, linear polarization solid state laser, 2, the preparatory relevant isolator of amplifying stage polarization,
3, preparatory amplifying stage pumping source, 4, the relevant bundling device of amplifying stage polarization in advance,
5, preparatory amplifying stage double clad polarization maintaining optical fibre, 6, the relevant isolator of main amplifying stage polarization,
7, main amplifying stage pumping source, 8, the relevant bundling device of main amplifying stage polarization,
9, main amplifying stage double clad polarization maintaining optical fibre, 10, the relevant collimation isolator of polarization,
11, polarizing beam splitter, 12, λ/4 wave plates,
13, absorber of light, 14, work piece,
15, linear polarization solid laser module, 16, the beam-expanding collimation mirror,
17, condenser lens, 18, the coupling output optical fibre.
The specific embodiment
Below, specify the specific embodiment of the utility model in conjunction with Fig. 1, Fig. 2.
Fig. 1 is the integrally-built figure of the linear polarization pulsed optical fibre laser processing unit (plant) that is used for industrial processes that relates to of expression the utility model, and Fig. 2 is the figure of the internal structure of the linear polarization solid state laser 1 in the above-mentioned linear polarization pulsed optical fibre laser processing unit (plant) of expression.
As shown in Figure 1, the linear polarization pulsed optical fibre laser processing unit (plant) that this embodiment relates to comprises: linear polarization solid state laser 1; By the relevant isolator 2 of preparatory amplifying stage polarization, amplifying stage pumping source 3, relevant bundling device 4 of amplifying stage polarization and the preparatory amplifying stage unit that constitutes such as amplifying stage double clad polarization maintaining optical fibre 5 in advance in advance in advance; The main amplifying stage unit that constitutes by the relevant isolator 6 of main amplifying stage polarization, main amplifying stage pumping source 7, the relevant bundling device 8 of main amplifying stage polarization, main amplifying stage double clad polarization maintaining optical fibre 9 etc.; And the relevant collimation isolator 10 of polarization, polarizing beam splitter 11, λ/4 wave plates 12 and the absorber of light 13 etc. that are connected to workpiece one side of above-mentioned main amplifying stage unit in turn.
The linearly polarized laser that is produced by linear polarization solid state laser 1 enters into preparatory amplifying stage unit.
In this preparatory amplifying stage unit, above-mentioned linearly polarized laser gets into preparatory amplifying stage pumping source 3 and carries out pumping through after the relevant isolator 2 of preparatory amplifying stage polarization.The relevant isolator 2 of this preparatory amplifying stage polarization is to allow light to the passive device of a direction through stoping to pass through round about; Its effect is that the direct of travel to light limits; Make light can only folk prescription to transmission; Light through the optical fiber echo reflection is returned can be isolated by isolator well, thereby improves the efficiency of transmission of light wave, prevents in the light path because a variety of causes produces the back harmful effect that light source and light path system is produced to transmission light.
Afterwards, the pump light from preparatory amplifying stage pumping source 3 outgoing gets into the relevant bundling device 4 of preparatory amplifying stage polarization.The relevant bundling device 4 of this preparatory amplifying stage polarization is a kind of end pumping devices, and it has high coupling efficiency, is convenient to constitute seamless link with other optical fibre device, is used for pump light is coupled into preparatory amplifying stage double clad polarization maintaining optical fibre 5.Then, propagating in the amplifying stage double clad polarization maintaining optical fibre 5 in advance, absorbed by the working-laser material in the amplifying stage double clad polarization maintaining optical fibre 5 in advance simultaneously and produce one-level and amplify pulse laser through the pump light of the relevant bundling device 4 of preparatory amplifying stage polarization.
Then, the laser that is produced by above-mentioned preparatory amplifying stage unit gets into main amplifying stage unit.
The formation of the formation of main amplifying stage unit and above-mentioned preparatory amplifying stage unit is basic identical, also is to be made up of the relevant isolator of polarization, pumping source, the relevant bundling device of polarization, double clad polarization maintaining optical fibre etc.In main amplifying stage unit, laser carries out pumping through the relevant isolator 6 laggard amplifying stage pumping sources 7 of becoming owner of of main amplifying stage polarization.Wherein, The relevant isolator 6 of main amplifying stage polarization is to allow light to the passive device of a direction through stoping to pass through round about; Its effect is that direction of light is limited, make light can only folk prescription to transmission, thereby the light of returning through the optical fiber echo reflection can be isolated by isolator well; Improve the efficiency of transmission of light wave, prevent thus in the light path because a variety of causes produces the back harmful effect that light source and light path system is produced to transmission light.
Afterwards; Get into the relevant bundling device 8 of main amplifying stage polarization from the pump light of main amplifying stage pumping source 7 outgoing; The relevant bundling device 8 of this main amplifying stage polarization is a kind of end pumping devices; It has high coupling efficiency, is convenient to constitute seamless link with other optical fibre device, is used for pump light is coupled into main amplifying stage double clad polarization maintaining optical fibre 9.Then, propagate in main amplifying stage double clad polarization maintaining optical fibre 9 through the pump light of the relevant bundling device 8 of this main amplifying stage polarization, this pump light is produced secondary amplification pulse laser by the absorption of the working-laser material in the main amplifying stage double clad polarization maintaining optical fibre 9 simultaneously.
Then, after the laser that produced gets into the relevant collimation isolator 10 of polarization, remain the linear polarization pulse laser from what the output of the relevant collimation isolator 10 of polarization obtained.It is back to transmission bad light source of light loss and light path system that the relevant collimation isolator 10 of this polarization is used to prevent to amplify the issuable high energy pulse in back etc. through gain fibre.
Afterwards,, become after the circularly polarized light through polarizing beam splitter 11 and λ/4 wave plates 12 successively, be radiated on the surface of work piece 14 and carry out Laser Processing via the linear polarization pulse laser of the relevant collimation isolator 10 of polarization.In process, reflection back, the surface of a part of light work piece 14 is returned along former road, gets into λ/4 wave plates 12 successively and becomes linearly polarized light.At this, its polarization direction becomes the direction vertical with former polarization direction, therefore, when it gets into polarizing beam splitter 11, is separated to the direction towards absorber of light 13 by polarizing beam splitter 11, and is absorbed by absorber of light 13, thereby reaches the effect of antireflection light.
In above-mentioned preparatory amplifying stage unit and main amplifying stage unit; The signal input part phase welding of relevant with each polarization respectively bundling device 4,8 of output of the relevant isolator 2,6 of each polarization; And fine phase welding is gone in the pumping of the relevant bundling device 4,8 with each polarization of the tail optical fiber of each pumping source 3,7.In addition, the end welding mutually of the output of the relevant bundling device 4,8 of each polarization and each double clad polarization maintaining optical fibre 5,9.And, the other end of preparatory amplifying stage double clad polarization maintaining optical fibre 6 and the fine phase welding of going into of the relevant isolator 6 of main amplifying stage polarization; The relevant collimation isolator 10 of the other end of main amplifying stage double clad polarization maintaining optical fibre 9 with polarization go into fine phase welding, thus, can obtain the linear polarization pulse laser at the output of the relevant collimation isolator 10 of polarization.
In addition, the optical fiber at all weld two ends all is preferably the core diameter matched fiber more than.
Moreover; In this embodiment, given an example laser has been carried out the linear polarization pulsed optical fibre laser processing unit (plant) that secondary amplifies; But the utility model does not limit the progression that laser amplifies; Can select multistage structure for amplifying according to required laser power, wherein, each level all can be made up of the relevant isolator of polarization, the relevant bundling device of polarization, pumping source and double clad polarization maintaining optical fibre.
Further, illustrate the internal structure of the linear polarization solid state laser 1 in the above-mentioned linear polarization pulsed optical fibre laser processing unit (plant) with reference to Fig. 2.
As shown in Figure 2, the linear polarization solid state laser 1 of the seed source unit of pulse optical fiber comprises linear polarization solid laser module 15, beam-expanding collimation mirror 16, condenser lens 17 and the coupling output optical fibre 18 of configuration successively as a whole.At this base,, behind beam-expanding collimation mirror 16 and condenser lens 17, enter into coupling output optical fibre 18 from the linear polarization pulse laser of linear polarization solid laser module 15 outputs.In addition, above-mentioned coupling output optical fibre 18 and in advance the going into fibre and can be welded together of the relevant isolator 2 of amplifying stage polarization through drawing awl method etc.Linear polarization solid state laser 1 is not limited to said structure, as long as laser instrument that can output line polarized pulses light.
In addition, above-mentioned preparatory amplifying stage pumping source 3 can be the optical fiber coupling way of output with main amplifying stage pumping source 7.In addition, the pumping input of relevant bundling device 4 of above-mentioned preparatory amplifying stage polarization and the relevant bundling device 8 of main amplifying stage polarization can pumping general power as required be added to fine quantity or improve the single armed pump power.
As stated, the linear polarization pulsed optical fibre laser processing unit (plant) according to the utility model can produce the laser of high stability, high light beam quality, and has antireflection light function, and low cost of manufacture.
Under the above-mentioned instruction of the utility model, those skilled in the art can carry out various improvement and distortion on the basis of the foregoing description, and these improvement and distortion; All drop in the protection domain of the utility model; It will be understood by those skilled in the art that the just better purpose of explaining the utility model of above-mentioned specific descriptions, the protection domain of the utility model is limited claim and equivalent thereof; Any change and distortion in this scope all drops within the protection domain of the utility model.
Claims (5)
1. linear polarization pulsed optical fibre laser processing unit (plant) comprises:
The linear polarization solid state laser is used to produce the linear polarization pulse laser;
A plurality of amplifying stages unit; Be connected the output end of said linear polarization solid state laser; Comprise polarization be correlated with relevant bundling device of isolator, pumping source, polarization and double clad polarization maintaining optical fibre respectively, the linear polarization pulse laser by said linear polarization solid state laser output is amplified; And
Be configured in polarization relevant collimation isolator, polarizing beam splitter and λ/4 wave plates of final output one side of said a plurality of amplifying stages unit successively; Make and be radiated on the work piece after relevant collimation isolator, polarizing beam splitter and λ/4 wave plates through said polarization from the laser through amplifying of said a plurality of amplifying stages unit output; And; The laser that is returned along optical axis by said processed object reflection is through after said λ/4 wave plates; Its polarization direction becomes vertical with former polarization direction, thereby is reflected to the direction vertical with optical axis by said polarizing beam splitter.
2. linear polarization pulsed optical fibre laser processing unit (plant) according to claim 1, wherein,
Said linear polarization solid state laser comprises linear polarization solid laser module, beam-expanding collimation mirror, condenser lens and the coupling output optical fibre of configuration successively.
3. linear polarization pulsed optical fibre laser processing unit (plant) according to claim 2, wherein,
Going into of the relevant isolator of polarization of the first order amplifying unit in the coupling output optical fibre of said linear polarization solid state laser and the said a plurality of amplifying stages unit is fine through drawing the welding of awl method to realize mould field coupling.
4. linear polarization pulsed optical fibre laser processing unit (plant) according to claim 1, wherein,
Adopt the fiber end face welding of mould field coupling between said a plurality of amplifying stages unit.
5. linear polarization pulsed optical fibre laser processing unit (plant) according to claim 1, wherein,
The pumping input of the relevant bundling device of polarization of a relevant bundling device of the polarization of the previous amplifying stage unit in said a plurality of amplifying stages unit and a back amplifying stage unit is added to fine quantity or improves the single armed pump power according to needed pumping general power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120205531 CN202192371U (en) | 2011-06-17 | 2011-06-17 | Linear polarization pulse fiber laser machining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120205531 CN202192371U (en) | 2011-06-17 | 2011-06-17 | Linear polarization pulse fiber laser machining device |
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| CN202192371U true CN202192371U (en) | 2012-04-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201120205531 Expired - Lifetime CN202192371U (en) | 2011-06-17 | 2011-06-17 | Linear polarization pulse fiber laser machining device |
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| CN (1) | CN202192371U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248286A (en) * | 2011-06-17 | 2011-11-23 | 山西飞虹激光科技有限公司 | Linear polarization pulse fiber laser processing device |
| CN105904085A (en) * | 2016-07-07 | 2016-08-31 | 中国科学院半导体研究所 | Semiconductor laser processing system |
-
2011
- 2011-06-17 CN CN 201120205531 patent/CN202192371U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248286A (en) * | 2011-06-17 | 2011-11-23 | 山西飞虹激光科技有限公司 | Linear polarization pulse fiber laser processing device |
| CN102248286B (en) * | 2011-06-17 | 2015-05-27 | 山西飞虹激光科技有限公司 | Linear polarization pulse fiber laser processing device |
| CN105904085A (en) * | 2016-07-07 | 2016-08-31 | 中国科学院半导体研究所 | Semiconductor laser processing system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120418 Effective date of abandoning: 20150527 |
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| RGAV | Abandon patent right to avoid regrant |