CN100576005C - Two-dimensional four-way laser beam duty ratio adjustment device - Google Patents
Two-dimensional four-way laser beam duty ratio adjustment device Download PDFInfo
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- CN100576005C CN100576005C CN200810201550A CN200810201550A CN100576005C CN 100576005 C CN100576005 C CN 100576005C CN 200810201550 A CN200810201550 A CN 200810201550A CN 200810201550 A CN200810201550 A CN 200810201550A CN 100576005 C CN100576005 C CN 100576005C
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Abstract
一种二维四路激光束占空比调节装置，由第一等腰棱镜、第二等腰棱镜、第一V型棱镜、第二V型棱镜、第一反射镜、第二反射镜和直角等腰棱镜组成，本发明装置可以实现激光束空间占空比的调节，从而可以提高相干组束后光束中心光斑能量，该装置具有占空比调节范围大、结构简单紧凑、体积小、稳定性好等特点。
A two-dimensional four-path laser beam duty cycle adjustment device is composed of a first isosceles prism, a second isosceles prism, a first V-shaped prism, a second V-shaped prism, a first reflector, a second reflector and a right-angle isosceles prism. The device of the invention can adjust the spatial duty cycle of the laser beam, thereby improving the energy of the central spot of the beam after coherent beam combination. The device has the characteristics of a large duty cycle adjustment range, a simple and compact structure, a small size, good stability, etc.
Description
Technical field
The present invention relates to high-capacity optical fiber laser, particularly a kind of device for adjusting two-dimensional four-way laser beam duty ratio.
Background technology
Along with the expansion of fiber laser application, also strict more to the requirement of high-capacity optical fiber laser, export more high-power also the requirement simultaneously and guarantee good beam quality, just require output beam to have high brightness.In order to obtain high brightness laser output, developed the coherent beam combination technology, because the coherent beam combination technology can make the multi-path laser bundle pass through coherence stack, beam quality [the M.Wicknham that last output power also can guarantee when being improved, J.Anderegg, S.Brosnan, D.Hammons, H.Komine and M.Weber, " Coherently coupled high powerfiber arrays ", in Advanced Solid State Photonics, Santa Fe, USA, February1-4,2004, paper MA4], but in beam combination, the numerical value of the dutycycle between the light beam has very big effect to the beam combination effect, and the space dutycycle of so-called light beam is the ratio of the distance of beam diameter and adjacent beams, the numerical value of the space dutycycle by changing the Laser Output Beam in the beam combination, beam center light spot energy behind the raising coherent beam combination is to satisfy the actual demand of Laser Output Beam.
Summary of the invention
The invention reside in provides a kind of device for adjusting two-dimensional four-way laser beam duty ratio, this device can be realized the adjusting of laser beam space dutycycle, thereby can improve beam center light spot energy behind the coherent beam combination, this device has big, simple and compact for structure, the characteristics such as volume is little, good stability of duty cycle adjustment scope.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
A kind of device for adjusting two-dimensional four-way laser beam duty ratio, be characterized in: by the first isosceles prism, the second isosceles prism, the first V-type prism, the second V-type prism, first catoptron, second catoptron and right angle isosceles prism are formed, the position of above-mentioned each element relation is as follows: on one side of the optical axis of this device, the bottom surface of the described first isosceles prism, the V-type face of the first V-type prism, the reflecting surface of first catoptron is arranged in order in face of the light beam working direction, described first catoptron and described light beam are at 45, the bottom surface of the described second isosceles prism, the V-type face of the second V-type prism, the reflecting surface of second catoptron is in face of another parallel beam working direction, described second catoptron and this parallel beam working direction are at 45, another side at the optical axis of this device is arranged in order symmetrically, and the base of described right angle isosceles prism is perpendicular to the optical axis of this device; First light beam and second light beam, parallel, symmetrical, vertically incide the bottom surface of the first isosceles prism, incide the central plane such as a right angle of described right angle isosceles prism through the first V-type prism and first catoptron then and reflect; The 3rd light beam and the 4th light beam are through the second isosceles prism, behind the second V-type prism and second catoptron, reflex to the central plane such as another right angle of described right angle isosceles prism and reflect, described first light beam, second light beam, the 3rd light beam and the 4th light beam form symmetrical and the aplanatic parallel beam group about this device after by described right angle isosceles prismatic reflection.
The bottom surface of the described first isosceles prism, the second isosceles prism is coated with and the corresponding anti-reflection deielectric-coating of optical maser wavelength.
The V-type face of the described first V-type prism, the second V-type prism is coated with and the corresponding anti-reflection deielectric-coating of optical maser wavelength.
The reflecting surface of described first catoptron, second catoptron is coated with and the corresponding all-dielectric film of optical maser wavelength.
Two isosceles reflectings surface of described right angle isosceles prism are coated with and the corresponding all-dielectric film of optical maser wavelength.
Technique effect of the present invention:
By increasing the distance between isosceles prism and the corresponding V-type prism, and moving in the other direction with right angle isosceles prism along beam Propagation, can improve the dutycycle numerical value of two-dimensional four-way laser beam, thereby behind the two-dimensional four-way laser beam coherent beam combination, beam center light spot energy purpose behind the realization raising beam combination.This device can be realized the adjusting of laser beam space dutycycle, thereby can improve beam center light spot energy behind the coherent beam combination, and this device has big, simple and compact for structure, the characteristics such as volume is little, good stability of duty cycle adjustment scope.
Description of drawings
Fig. 1 is a device for adjusting two-dimensional four-way laser beam duty ratio structural representation of the present invention.
Fig. 2 is the structural representation of device for adjusting two-dimensional four-way laser beam duty ratio Application Example of the present invention.
Embodiment
The invention will be further described below in conjunction with embodiment and accompanying drawing, but should not limit protection scope of the present invention with this.
See also Fig. 1 and Fig. 2 earlier, as seen from the figure, device for adjusting two-dimensional four-way laser beam duty ratio of the present invention, by the first isosceles prism 1, the second isosceles prism 2, the first V-type prism 3, the second V-type prism 4, first catoptron 5, second catoptron 6 and right angle isosceles prism 7 are formed, the position of above-mentioned each element relation is as follows: on one side of the optical axis of this device, the bottom surface of the described first isosceles prism 1, the V-type face of the first V-type prism 3, the reflecting surface of first catoptron 5 is arranged in order in face of the light beam working direction, described first catoptron 5 is at 45 with described light beam, the bottom surface of the described second isosceles prism 2, the V-type face of the second V-type prism 4, the reflecting surface of second catoptron 6 is in face of another parallel beam working direction, the another side of described second catoptron 6 and this parallel beam working direction optical axis at this device at 45 is arranged in order symmetrically, and the base of described right angle isosceles prism 7 is perpendicular to the optical axis of this device; The first light beam L1 and the second light beam L2, parallel, symmetrical, vertically incide the bottom surface of the first isosceles prism 1, incide the central plane such as a right angle of described right angle isosceles prism 7 through the first V-type prism 3 and first catoptron 5 then and reflect; The 3rd light beam L3 and the 4th light beam L4 are through the second isosceles prism 2, behind the second V-type prism 4 and second catoptron 6, reflex to the central plane such as another right angle of described right angle isosceles prism 7 and reflect, the described first light beam L1, the second light beam L2, the 3rd light beam L3 and the 4th light beam L4 are formed symmetrical and aplanatic parallel beam group about this device by described right angle isosceles prism 7 reflection backs.
The bottom surface of the described first isosceles prism 1, the second isosceles prism 2 is coated with and the corresponding anti-reflection deielectric-coating of optical maser wavelength.
The V-type face of the described first V-type prism 3, the second V-type prism 4 is coated with and the corresponding anti-reflection deielectric-coating of optical maser wavelength.
The reflecting surface of described first catoptron 5, second catoptron 6 is coated with and the corresponding all-dielectric film of optical maser wavelength.
Two isosceles reflectings surface of described right angle isosceles prism 7 are coated with and the corresponding all-dielectric film of optical maser wavelength.
The first light beam L1 and the second light beam L2, parallel symmetry vertically incides the bottom surface of the first isosceles prism 1, after inciding the V-type face of the first V-type prism 3 after 1 refraction of the first isosceles prism, the described first light beam L1 and the second light beam L2 become parallel beam again, incide the side of right angle isosceles prism 7 then through first catoptron 5, same method, the 3rd light beam L3 and the 4th light beam L4, through the second isosceles prism 2, behind the second V-type prism 4 and second catoptron 6, incide the another side of described right angle isosceles prism 7, the described light beam first light beam L1, the second light beam L2, the 3rd light beam L3 and the 4th light beam L4 are formed about the parallel beam group of optical axis to journey by described right angle isosceles prism 7 reflection backs.Along the beam Propagation direction, by increasing isosceles prism 1 and V-type prism 3, distance between isosceles prism 2 and the V-type prism 4, and right angle isosceles prism 7 is mobile in the other direction along the outgoing beam transmission, promptly can improve the dutycycle numerical value of sets of beams, thereby behind the two-dimensional four-way laser beam coherent beam combination, the purpose of beam center light spot energy behind the realization raising beam combination.
Lifting a specific embodiment below is described below:
As shown in Figure 2, adopt four and mix Yb
3+Fiber laser, output optical maser wavelength is 1080nm, every road laser output power is 10W, the first isosceles prism 1, the second isosceles prism 2 is of a size of 40 * 9 * 20mm, the first V-type prism 3, the second V-type prism 4 is of a size of 40 * 14 * 20mm, first catoptron 5, the reflecting surface of second catoptron 6 is coated with the high anti-reflectance coating to wavelength 1080nm, right angle isosceles prism 7 is of a size of 50 * 25 * 40mm, the focal length of beam combination lens 8 is 200mm, it is 30% reflecting medium film that the plane of incidence of coupling mirror 9 is coated with wavelength 1080nm reflectivity, and the focal length of collimation lens 10 is 30mm.By changing the position of the first isosceles prism 1, the second isosceles prism 2, the first V-type prism 3, the second V-type prism 4 and right angle isosceles prism 7, the numerical value of the dutycycle of sets of beams can change arbitrarily in 0.5～3 scope, and the beam center power of the laser of output is 27W.
Claims (5)
1, a kind of device for adjusting two-dimensional four-way laser beam duty ratio, it is characterized in that: by the first isosceles prism (1), the second isosceles prism (2), the first V-type prism (3), the second V-type prism (4), first catoptron (5), second catoptron (6) and right angle isosceles prism (7) are formed, the position of above-mentioned each element relation is as follows: on one side of the optical axis of this device, the bottom surface of the described first isosceles prism (1), the V-type face of the first V-type prism (3), the reflecting surface of first catoptron (5) is arranged in order in face of the light beam working direction, and described first catoptron (5) is at 45 with described light beam; The reflecting surface of the V-type face of the bottom surface of the described second isosceles prism (2), the second V-type prism (4), second catoptron (6) is in face of another parallel beam working direction, described second catoptron (6) and this parallel beam working direction are at 45, are arranged in order relatively symmetrically at another side and the described first isosceles prism (1), the first V-type prism (3) and first catoptron (5) of the optical axis of this device; The base of described right angle isosceles prism (7) is perpendicular to the optical axis of this device; First light beam (L1) and second light beam (L2), parallel, symmetrical, vertically incide the bottom surface of the first isosceles prism (1), incide the central plane such as a right angle of described right angle isosceles prism (7) through the first V-type prism (3) and first catoptron (5) then and reflect; The 3rd light beam (L3) and the 4th light beam (L4) are through the second isosceles prism (2), behind the second V-type prism (4) and second catoptron (6), reflex to the central plane such as another right angle of described right angle isosceles prism (7) and reflect, described first light beam (L1), second light beam (L2), the 3rd light beam (L3) and the 4th light beam (L4) are by symmetrical and the aplanatic parallel beam group of described right angle isosceles prism (7) reflection back formation about this device, distance between the described first isosceles prism (1) and the first V-type prism (3) is adjustable, distance between the described second isosceles prism (2) and the second V-type prism (4) is adjustable, and described right angle isosceles prism (7) can move forward and backward along the outgoing beam direction.
2, device for adjusting two-dimensional four-way laser beam duty ratio according to claim 1 is characterized in that the bottom surface of the described first isosceles prism (1), the second isosceles prism (2) is coated with and the corresponding anti-reflection deielectric-coating of optical maser wavelength.
3, device for adjusting two-dimensional four-way laser beam duty ratio according to claim 1 is characterized in that the V-type face of the described first V-type prism (3), the second V-type prism (4) is coated with and the corresponding anti-reflection deielectric-coating of optical maser wavelength.
4, device for adjusting two-dimensional four-way laser beam duty ratio according to claim 1 is characterized in that the reflecting surface of described first catoptron (5), second catoptron (6) is coated with and the corresponding all-dielectric film of optical maser wavelength.
5, according to each described device for adjusting two-dimensional four-way laser beam duty ratio of claim 1 to 4, it is characterized in that: two isosceles reflectings surface of described right angle isosceles prism (7) are coated with and the corresponding all-dielectric film of optical maser wavelength.
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| CN200810201550A CN100576005C (en) | 2008-10-22 | 2008-10-22 | Two-dimensional four-way laser beam duty ratio adjustment device |
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| CN200810201550A CN100576005C (en) | 2008-10-22 | 2008-10-22 | Two-dimensional four-way laser beam duty ratio adjustment device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104020566B (en) * | 2014-04-28 | 2017-01-04 | 中国科学院上海光学精密机械研究所 | Two-dimensional large-scale laser beam array duty ratio adjusting device |
| CN107402450B (en) * | 2017-09-19 | 2023-09-12 | 合肥全色光显科技有限公司 | A three-dimensional stepped prism beam compression device |
| CN114309923A (en) * | 2021-12-17 | 2022-04-12 | 深圳市大族数控科技股份有限公司 | Beam Spacing Adjustment Module and Processing Equipment |
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| US20060171428A1 (en) * | 2005-02-03 | 2006-08-03 | Pd-Ld, Inc. | High-power, phased-locked, laser arrays |
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| US20070002925A1 (en) * | 2004-10-25 | 2007-01-04 | Nuvonyx, Inc. | External cavity laser diode system and method thereof |
| CN100384033C (en) * | 2005-05-30 | 2008-04-23 | 中国科学院物理研究所 | An active and passive control laser coherent combining device |
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Patent Citations (6)
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| US20070002925A1 (en) * | 2004-10-25 | 2007-01-04 | Nuvonyx, Inc. | External cavity laser diode system and method thereof |
| CN2769918Y (en) * | 2004-12-21 | 2006-04-05 | 中国科学院上海光学精密机械研究所 | Proportion-adjustable beam splitter |
| US20060171428A1 (en) * | 2005-02-03 | 2006-08-03 | Pd-Ld, Inc. | High-power, phased-locked, laser arrays |
| CN100384033C (en) * | 2005-05-30 | 2008-04-23 | 中国科学院物理研究所 | An active and passive control laser coherent combining device |
| CN1805226A (en) * | 2006-01-18 | 2006-07-19 | 中国科学院上海光学精密机械研究所 | Laser coherent beam combining device |
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