CN102540470A - Laser flare plastic device and laser flare plastic method - Google Patents

Laser flare plastic device and laser flare plastic method Download PDF

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Publication number
CN102540470A
CN102540470A CN2011100580785A CN201110058078A CN102540470A CN 102540470 A CN102540470 A CN 102540470A CN 2011100580785 A CN2011100580785 A CN 2011100580785A CN 201110058078 A CN201110058078 A CN 201110058078A CN 102540470 A CN102540470 A CN 102540470A
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China
Prior art keywords
divided beams
optical fiber
beam splitter
shaping
laser
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CN2011100580785A
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Chinese (zh)
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樊仲维
吴海涛
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Beijing GK Laser Technology Co Ltd
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Beijing GK Laser Technology Co Ltd
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Priority to CN2011100580785A priority Critical patent/CN102540470A/en
Publication of CN102540470A publication Critical patent/CN102540470A/en
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Abstract

The invention discloses a laser flare plastic device and a laser flare plastic method. The device comprises a laser source, a coupling unit, a plurality of optical fibers and a beam splitting unit. The laser source is used for outputting a laser beam, the beam splitting unit is used for splitting the laser beam into a plurality of branch laser beams, the coupling unit is used for correspondingly coupling the plurality of branch laser beams into the plurality of optical fibers, and the output ends of the plurality of optical fibers are aslant arranged so that the branch laser beams output by the plurality of optical fibers converge. The laser flare plastic device and the laser flare plastic method enable the laser beams to be easily coupled into the optical fibers and easily transmitted, and the optical fibers are not easily damaged.

Description

A kind of laser facula apparatus for shaping and laser facula shaping methods
Technical field
The present invention relates to a kind of laser facula apparatus for shaping and laser facula shaping methods.
Background technology
At laser field, wanting to obtain relatively uniformly usually, hot spot can adopt following method: after 1, making light pass through spatial filter, do shaping again and handle; 2, make light through behind a branch of optical fiber, do shaping again and handle; Obtain hot spot uniformly thus.
More than two kinds of each have their own relative merits of scheme:
First kind of scheme adopts spatial filter.General spatial filter is made up of the aperture of microlens group and micron number magnitude.Aperture is positioned at the lens group focus position, and promptly on the frequency plane, behind light beam process spatial filter, zero level sees through, and filters positive and negative one-level, obtains dispersing relatively uniformly hot spot like this.The rear end is used the collimated light path shaping again, generally just can obtain more uniform hot spot with a slice convex lens.This method ratio is directly far better with the hot spot homogeneity that two direct shapings of lens obtain, but this scheme has very big loss to luminous energy.
Second kind of scheme, laser is through being coupled into the single beam fibre.Please with reference to Fig. 1, Fig. 1 is that a kind of prior art gets into the fine structural representation of single beam with laser coupled.Optical fiber 12 has an input end face 121, and laser 10 focuses on input end face 121 through a focus lens group 11.Laser 10 is after total reflection effect in optical fiber 12, and the outgoing hot spot can be very even.But, just relatively more difficult if laser 10 energy are very high to a branch of optical fiber 12 couplings, because the higher laser 10 of energy is easy to break optical fiber 12.
Summary of the invention
For solve prior art utilize optical fiber carry out laser facula apparatus for shaping difficulty higher, break the problem of optical fiber easily, the present invention provides a kind of difficulty that is coupled laser facula apparatus for shaping low, not fragile optical fiber.
For solve prior art utilize optical fiber carry out laser facula shaping methods difficulty higher, break the problem of optical fiber easily, the present invention provides a kind of difficulty that is coupled laser facula shaping methods low, not fragile optical fiber.
Technical scheme of the present invention is:
A kind of laser facula apparatus for shaping; Comprise: lasing light emitter, coupling unit, beam splitting unit of a plurality of optical fiber; Said lasing light emitter is used to export a light beam, and said beam splitting unit is used for said light beam is divided into a plurality of divided beams, said coupling unit be used for said a plurality of divided beams respectively correspondence be coupled into said a plurality of optical fiber; The output terminal of said a plurality of optical fiber is obliquely installed, and makes the divided beams of said a plurality of optical fiber outputs assemble.
In an embodiment of the invention, described laser facula apparatus for shaping also comprises a shaping unit, is used for the divided beams of the convergence of said a plurality of optical fiber output is carried out shaping.
In an embodiment of the invention; Said beam splitting unit comprises first beam splitter to the N-1 beam splitter; Said laser beam passes through said first beam splitter to the N-1 beam splitter respectively; Said first beam splitter to the N-1 beam splitter beam reflected constitutes the 1st to the N-1 divided beams, and the light beam of N-1 transmission constitutes the N divided beams.
In an embodiment of the invention, the reflectivity of i beam splitter is 1/ (N-i+1) in said first beam splitter to the N-1 beam splitter.
In an embodiment of the invention, said coupling unit comprises a plurality of focus lens group, and each focus lens group is used for a divided beams is coupled into an optical fiber.
In an embodiment of the invention, described laser facula apparatus for shaping also comprises a plurality of clamping devices, is used for the output terminal of the said optical fiber of fixing.
A kind of laser facula shaping methods is characterized in that, comprising: utilize the beam splitting unit that a laser beam is divided into a plurality of divided beams; Utilize coupling unit with said a plurality of divided beams respectively correspondence be coupled into a plurality of optical fiber; Output terminal through with said a plurality of optical fiber is obliquely installed, and makes the hot spot of the divided beams that said a plurality of optical fiber is exported merge into a shaping hot spot.
In an embodiment of the invention; Said beam splitting unit comprises first beam splitter to the N-1 beam splitter; Said laser beam passes through said first beam splitter to the N-1 beam splitter respectively; Said first beam splitter to the N-1 beam splitter beam reflected constitutes the 1st to the N-1 divided beams, and the light beam of N-1 transmission constitutes the N divided beams.
In an embodiment of the invention, the reflectivity of i beam splitter is 1/ (N-i+1) in said first beam splitter to the N-1 beam splitter.
In an embodiment of the invention, the energy of said a plurality of divided beams equates.
Laser facula apparatus for shaping of the present invention and method since divided beams through total reflection effect in optical fiber after, the outgoing meeting is very even, the shaping hot spot of final merging is also very even.And,, be transmitted also more difficult damage optical fiber more easily so be coupled into optical fiber more easily because the energy of divided beams has only the part of elementary beam.
Description of drawings
Fig. 1 is that a kind of prior art gets into the fine structural representation of single beam with laser coupled.
Fig. 2 is the process flow diagram of laser facula shaping methods of the present invention.
Fig. 3 is the structural representation of the laser facula apparatus for shaping 2 of first embodiment of the invention.
Fig. 4 is the structural representation of the laser facula apparatus for shaping 3 of second embodiment of the invention.
Embodiment
Please with reference to Fig. 2, Fig. 2 is the process flow diagram of laser facula shaping methods of the present invention.Laser facula shaping methods of the present invention comprises the steps:
Step S1: utilize the beam splitting unit that a laser beam is divided into a plurality of divided beams;
Said beam splitting unit comprises first beam splitter to the N-1 beam splitter, and the reflectivity of i beam splitter is 1/ (N-i+1) in said first beam splitter to the N-1 beam splitter.Said laser beam passes through said first beam splitter to the N-1 beam splitter respectively, and said first beam splitter to the N-1 beam splitter beam reflected constitutes the 1st to the N-1 divided beams, and the light beam of N-1 transmission constitutes the N divided beams.
Step S2: utilize coupling unit with said a plurality of divided beams respectively correspondence be coupled into a plurality of optical fiber;
Step S3: the output terminal through with said a plurality of optical fiber is obliquely installed, and makes the hot spot of the divided beams that said a plurality of optical fiber is exported merge into a shaping hot spot.
Introduce first embodiment of the laser facula apparatus for shaping that is used for embodiment of the present invention laser facula shaping methods below.
Please with reference to Fig. 3, Fig. 3 is the structural representation of the laser facula apparatus for shaping 2 of invention first embodiment.Laser facula apparatus for shaping 2 comprises that a lasing light emitter being provided with in regular turn along light path 21, beam splitting unit 22, coupling unit 23, first optical fiber 242, second optical fiber 243 and one merge device 25.
Lasing light emitter 21 is used to export a laser beam 211 with higher-energy.In this embodiment, lasing light emitter 21 is semiconductor pump lasers.
Beam splitting unit 22 is used for light beam 211 is divided into one first divided beams 212 and one second divided beams 213, and makes the energy of first divided beams 212 and second divided beams 213 identical as far as possible.In this embodiment, beam splitting unit 22 comprises a beam splitter 221, first catoptron 226, second catoptron 227, the 3rd catoptron 228.The reflectivity of desirable beam splitter 221 is 50%; Transmissivity is 50%; Being 45 degree with light beam 211 directions of propagation places; Therefore light beam 211 is behind beam splitter 221, and the light beam 211 of half energy is reflected and becomes first divided beams 212, and the light beam 211 of second half energy penetrates beam splitter 221 and becomes second divided beams 213.First catoptron 226 and second divided beams, 213 directions of propagation are 45 degree places, and is used to change second divided beams 213 and makes it parallel with first divided beams 212.Second catoptron 227, the 3rd catoptron 228 are used for changing once more the direction of propagation and the adjustment spacing of first divided beams 212, second divided beams 213, with first divided beams 212, second divided beams, 213 guiding coupling units 23.
Coupling unit 23 be used for first divided beams 212 and second divided beams 213 respectively correspondence be coupled into first optical fiber 242 and second optical fiber 243.In this embodiment; Coupling unit 23 comprise first focus lens group 231 and second focus lens group, 232, the first focus lens group 231 and second focus lens group 232 be used for first divided beams 212 and second divided beams 213 respectively correspondence be coupled into first optical fiber 242 and second optical fiber 243.First divided beams 212 and second divided beams 213 that arrive first optical fiber 242 and second optical fiber 243 through first focus lens group 231 and second focus lens group 232 need to guarantee the numerical aperture angle of the angle of convergence less than optical fiber, can in first optical fiber 242 and second optical fiber 243, transmit to guarantee first divided beams 212 and second divided beams 213.
Merging device 25 is used for first divided beams of exporting from first optical fiber 242 and second optical fiber 243 212 and the hot spot of second divided beams 213 are merged into a shaping hot spot 260.In this embodiment; Merge device 25 and comprise two clamping devices 251; The output terminal that is used for fixing first optical fiber 242 and second optical fiber 243; Make spacing and angle between first optical fiber 242 and second optical fiber 243 as far as possible little; Guaranteeing that its property transmitted is high as far as possible, and make and to assemble, the hot spot of first divided beams 212 and second divided beams 213 is merged into a shaping hot spot 260 from said first optical fiber 242 and first divided beams 212 and second divided beams 213 that second optical fiber 243 is exported.
This embodiment since first divided beams 212 and second divided beams 213 through total reflection effect in first optical fiber 242 and second optical fiber 243 after, the outgoing hot spot can be very even, finally the shaping hot spot 260 of merging is also very even.And,, be transmitted also more difficult damage optical fiber more easily so be coupled into optical fiber more easily because the energy of first divided beams 212 and second divided beams 213 has only the half the of light beam 211.
Please with reference to Fig. 4, Fig. 4 is the structural representation of the laser facula apparatus for shaping 3 of second embodiment of the invention.Laser facula apparatus for shaping 3 comprises that a lasing light emitter being provided with in regular turn along light path 31, beam splitting unit 32, coupling unit 33, first optical fiber 342, second optical fiber 343, the 3rd optical fiber 344 and one merge device 35.
Lasing light emitter 31 is used to export a laser beam 311 with higher-energy.In this embodiment, lasing light emitter 31 is semiconductor pump lasers.
Beam splitting unit 32 is used for light beam 311 is divided into first divided beams 312, second divided beams 313 and the 3rd divided beams 314, and makes the energy of first divided beams 312, second divided beams 313 and the 3rd divided beams 314 identical as far as possible.In this embodiment, beam splitting unit 32 comprises one first beam splitter 321, second beam splitter 322 and first catoptron 326, second catoptron 327, the 3rd catoptron 328, the 4th catoptron 329.The reflectivity of the first desirable beam splitter 321 is 33.33%, and transmissivity is 66.67%, is 45 degree with light beam 211 directions of propagation and places.The reflectivity of the second desirable beam splitter 322 is 50%, and transmissivity is 50%, also is the rear that 45 degree are positioned over first beam splitter 321 with light beam 211 directions of propagation.
Light beam 311 is about 1/3 light beam, 211 energy and is reflected and becomes first divided beams 312 behind first beam splitter 321, and 2/3 light beam, 211 energy penetrate first beam splitter 321 and become intermediate beam in addition.Second beam splitter 322 is again with half energy (promptly being about 1/3 light beam, 211 energy) of intermediate beam reflection becoming second divided beams 313, and half energy (promptly being about 1/3 light beam, 211 energy) transmission of intermediate beam is become the 3rd divided beams 314.First catoptron 326 and the 3rd divided beams 314 directions of propagation are 45 degree places, and is used to change the 3rd divided beams 314 and makes it parallel with first divided beams 312, second divided beams 313.Second catoptron 327, the 3rd catoptron 328, the 4th catoptron 329 are used for changing once more the direction of propagation and the adjustment spacing of first divided beams 312, second divided beams 313, the 3rd divided beams 314, with first divided beams 312, second divided beams 313, the 3rd divided beams 314 guiding coupling units 33.
Coupling unit 33 be used for first divided beams 312, second divided beams 313, the 3rd divided beams 314 respectively correspondence be coupled into first optical fiber 342, second optical fiber 343, the 3rd optical fiber 344.In this embodiment; Coupling unit 33 comprise first focus lens group 331, second focus lens group 332, the 3rd condenser lens group 333, the first focus lens group 331, second focus lens group 332, the 3rd condenser lens group 333 be used for first divided beams 312, second divided beams 313, the 3rd divided beams 314 respectively correspondence be coupled into first optical fiber 342, second optical fiber 343, the 3rd optical fiber 344.First divided beams 312, second divided beams 313, the 3rd divided beams 314 that arrives first optical fiber 342, second optical fiber 343, the 3rd optical fiber 344 through first focus lens group 331, second focus lens group 332, the 3rd condenser lens group 333 needs to guarantee the angle the assembled numerical aperture angle less than optical fiber, can transmission in first optical fiber 342, second optical fiber 343, the 3rd optical fiber 344 to guarantee first divided beams 312, second divided beams 313, the 3rd divided beams 314.
Merging device 35 is used for merging into a shaping hot spot 360 from the hot spot of first divided beams 312 of first optical fiber 342, second optical fiber 343,344 outputs of the 3rd optical fiber, second divided beams 313, the 3rd divided beams 314.In this embodiment; Merge device 35 and comprise three clamping devices 351; The output terminal that is used for fixing first optical fiber 342, second optical fiber 343, the 3rd optical fiber 344; Make spacing and angle between first optical fiber 342, second optical fiber 343, the 3rd optical fiber 344 as far as possible little; Guaranteeing that its property transmitted is high as far as possible, and make and to assemble, the hot spot of first divided beams 312, second divided beams 313, the 3rd divided beams 314 is merged into a shaping hot spot 360 from first divided beams 312 of said first optical fiber 342, second optical fiber 343,344 outputs of the 3rd optical fiber, second divided beams 313, the 3rd divided beams 314.
This embodiment since first divided beams 312, second divided beams 313, the 3rd divided beams 314 after total reflection effect in first optical fiber 342, second optical fiber 343, the 3rd optical fiber 344, the outgoing meeting is very even, the shaping hot spot 360 of final merging is also very even.And,, be transmitted also more difficult damage optical fiber more easily so be coupled into optical fiber more easily because the energy of first divided beams 312, second divided beams 313, the 3rd divided beams 314 has only 1/3 of light beam 311.
Those skilled in the art can confirm according to above-mentioned embodiment; The present invention not only can be divided into 2 equal portions and 3 equal portions; Can also be according to the energy intensity of light beam 211 or light beam 311 and the maximum optical intensity that optical fiber can bear; Light beam 211 or light beam 311 are divided into 4 five equilibriums, 5 equal portions ... the N equal portions, wherein N is any positive integer.With light beam 211 or light beam 311N equal portions the time, a preferred implementation is that the beam splitting unit comprises first beam splitter to the N-1 beam splitter, and the 1st catoptron to the N+1 catoptron.The reflectivity of first desirable beam splitter to the N-1 beam splitter is respectively 1/N, 1/ (N-1), 1/ (N-2), 1/ (N-3), 1/ (N-4) ... 1/3,1/2.First beam splitter to the N-1 beam splitter and light beam 211 or light beam 311 directions of propagation are 45 degree places in regular turn, and makes light beam 211 or light beam 311 in regular turn through first beam splitter to the N-1 beam splitter.Constituted first divided beams to the N-1 divided beams by first beam splitter to the N-1 beam splitter beam reflected, constitute the N divided beams from the light beam of N-1 beam splitter transmission.Such first divided beams to the N divided beams has just had equal energy.First catoptron and the N divided beams direction of propagation are 45 degree places, and is used for being adjusted into the direction of propagation of N+1 divided beams parallel with first divided beams to the N-1 divided beams.Second catoptron to the N+1 catoptron is used to change the direction of propagation and the adjustment spacing of first divided beams, second divided beams, the 3rd divided beams, with first divided beams to the N divided beams guiding coupling unit.
Above-mentioned embodiment has been described in realization in order to demonstrate the invention.But other variations of the present invention and modification are conspicuous to those skilled in the art, and any modification/variation in disclosed essence of the present invention and cardinal rule scope perhaps imitates conversion all to belong to claim protection domain of the present invention.

Claims (10)

1. laser facula apparatus for shaping; Comprise: lasing light emitter, coupling unit, a plurality of optical fiber; It is characterized in that: also comprise a beam splitting unit, said lasing light emitter is used to export a light beam, and said beam splitting unit is used for said light beam is divided into a plurality of divided beams; Said coupling unit be used for said a plurality of divided beams respectively correspondence be coupled into said a plurality of optical fiber, the propagation path of light of a plurality of divided beams of said a plurality of optical fiber output intersects at a point.
2. laser facula apparatus for shaping according to claim 1 is characterized in that the central axis of the output terminal of said a plurality of optical fiber is positioned at same plane and intersects at a point.
3. laser facula apparatus for shaping according to claim 1 and 2 is characterized in that, described laser facula apparatus for shaping also comprises a shaping unit, is used for the hot spot of the convergence divided beams of said a plurality of optical fiber output is carried out shaping.
4. laser facula apparatus for shaping according to claim 1 and 2; It is characterized in that; Said beam splitting unit comprises first beam splitter to the N-1 beam splitter; Said laser beam passes through said first beam splitter to the N-1 beam splitter respectively, and said first beam splitter to the N-1 beam splitter beam reflected constitutes the 1st to the N-1 divided beams, and the light beam of N-1 transmission constitutes the N divided beams.
5. laser facula apparatus for shaping according to claim 4 is characterized in that, the reflectivity of i beam splitter is 1/ (N-i+1) in said first beam splitter to the N-1 beam splitter.
6. laser facula apparatus for shaping according to claim 1 and 2 is characterized in that said coupling unit comprises a plurality of focus lens group, and each focus lens group is used for a divided beams is coupled into an optical fiber.
7. laser facula apparatus for shaping according to claim 1 and 2 is characterized in that, described laser facula apparatus for shaping also comprises a plurality of clamping devices, is used for the output terminal of the said optical fiber of fixing.
8. a laser facula shaping methods is characterized in that, comprising:
Utilize the beam splitting unit that a laser beam is divided into a plurality of divided beams;
Utilize coupling unit with said a plurality of divided beams respectively correspondence be coupled into a plurality of optical fiber;
Output terminal through with said a plurality of optical fiber is obliquely installed, and makes the hot spot of the divided beams that said a plurality of optical fiber is exported merge into a shaping hot spot.
9. laser facula shaping methods according to claim 8; It is characterized in that; Said beam splitting unit comprises first beam splitter to the N-1 beam splitter; Said laser beam passes through said first beam splitter to the N-1 beam splitter respectively, and said first beam splitter to the N-1 beam splitter beam reflected constitutes the 1st to the N-1 divided beams, and the light beam of N-1 transmission constitutes the N divided beams.
10. laser facula shaping methods according to claim 9 is characterized in that, the reflectivity of i beam splitter is 1/ (N-i+1) in said first beam splitter to the N-1 beam splitter.
CN2011100580785A 2011-03-10 2011-03-10 Laser flare plastic device and laser flare plastic method Pending CN102540470A (en)

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CN2011100580785A CN102540470A (en) 2011-03-10 2011-03-10 Laser flare plastic device and laser flare plastic method

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Application Number Priority Date Filing Date Title
CN2011100580785A CN102540470A (en) 2011-03-10 2011-03-10 Laser flare plastic device and laser flare plastic method

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107192537A (en) * 2017-04-25 2017-09-22 中国科学院光电研究院 The verification method and system of a kind of diffraction optical element laser shaping effect

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050270542A1 (en) * 2001-08-20 2005-12-08 Sullivan Mark T Direct combination of fiber optic light beams
CN101752773A (en) * 2008-12-05 2010-06-23 北京中视中科光电技术有限公司 Laser head

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050270542A1 (en) * 2001-08-20 2005-12-08 Sullivan Mark T Direct combination of fiber optic light beams
CN101752773A (en) * 2008-12-05 2010-06-23 北京中视中科光电技术有限公司 Laser head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107192537A (en) * 2017-04-25 2017-09-22 中国科学院光电研究院 The verification method and system of a kind of diffraction optical element laser shaping effect

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Application publication date: 20120704