CN103219648A - Optical fiber coupling system of laser light source - Google Patents
Optical fiber coupling system of laser light source Download PDFInfo
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- CN103219648A CN103219648A CN2013101245410A CN201310124541A CN103219648A CN 103219648 A CN103219648 A CN 103219648A CN 2013101245410 A CN2013101245410 A CN 2013101245410A CN 201310124541 A CN201310124541 A CN 201310124541A CN 103219648 A CN103219648 A CN 103219648A
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Abstract
The invention relates to a coupling system of a laser light source, in particular to an optical fiber coupling system of the laser light source. The optical fiber coupling system of the laser light source solves the problems that a laser beam is small in packing ratio, bad in beam quality and low in optical fiber coupling efficiency after space beam combination. The optical fiber coupling system of the laser light source comprises a convergence component, an optical wedge array, a micro-lens array and a beam concentration optical fiber, wherein the convergence component, the optical wedge array, the micro-lens array and the beam concentration optical fiber are placed in sequence in a coaxial mode, the optical wedge array is arranged in a position in front of a convergence point of a light beam which passes through the convergence component, and an end face of the beam concentration optical fiber is placed in an exit pupil position of the micro-lens array. According to the optical fiber coupling system of the laser light source, the convergence component and the optical wedge array are utilized to conduct compression on a laser beam, the optical parameter product of the light beam which penetrates through an optical wedge is greatly reduced, the packing ratio of the light beam is increased, quality of the light beam is improved, the micro-lens array is further utilized to enable the light beam to image on the exit pupil face, the beam concentration optical fiber is utilized to receive the imaged light beam in a one-to-one mode, coupling efficiency is high, and requirements of the fiber laser pumping field, the laser medicine field, the industrial machining field and the like on a high-quality laser are met.
Description
Technical field
The present invention relates to the coupled system of high-power integrated laser light source, be specially a kind of fiber coupling system of LASER Light Source.
Summary of the invention
Along with continuous progress in science and technology, every field is more and more significant to the demand of laser, especially to high-power, high brightness, high-quality laser, for example along with the development of projection display technique, lighting source is required to improve constantly, and laser more and more shows its special advantages; Just like fields such as the pumping source of laser marking, material cutting, welding, fiber laser, laser medicines high power laser light also there is more demand again.Semiconductor laser because have electro-optical efficiency height, wavelength wide coverage, reliability height, volume is little and characteristics such as with low cost, makes it have very remarkable advantages in the laser application.But because the power output of semiconductor laser is subject to several watts of magnitudes, far can not satisfy the high power requirement of these fields to laser, it is integrated to carry out laser beam; And the beam quality that semiconductor laser sends is poor, is also restricting the application of semiconductor laser in a lot of fields.Semiconductor laser can be divided into single tube semiconductor laser, mini-bar semiconductor laser and cm-bar semiconductor laser by the luminescence unit integration mode.The fiber coupling module of mini-bar semiconductor laser and cm-bar semiconductor laser need utilize running water cooling or ionized water cooling, and because the Micro Channel Architecture characteristics in the fiber coupling module are lower its useful life, being heated easily produces Smile effect (emission cavity near field nonlinear effect), reduces beam quality; And the single tube semiconductor laser all is a luminescence unit independently, can adopt conduction or air-cooled mode to dispel the heat, perfect heat-dissipating, and the influence of the series connection of not being heated can not produce the Smile effect in welding process, and the life-span can reach 100,000 hours usually.This feasible high efficiency fiber coupling module of making based on the single tube semiconductor laser becomes a better choice in fields such as optical fiber laser pump source, laser medicine and materials processing.U.S. nLIGHT company just is devoted to the optical fiber Coupling Research of single tube semiconductor laser, and present the said firm fiber coupling module goes out luminous power and can reach 1000W, optical fiber core diameter 400 μ m, NA(numerical aperture)=0.2, beam parameter product is 40mmmrad.The Changchun ray machine utilizes the single tube semiconductor laser as submodule, by beam collimation, space close bundle and technology such as focusing with the laser coupled of 33W to core diameter 200 μ m, the optical fiber of NA=0.22, coupling efficiency is up to 83%.Beijing Kai Pulin company utilizes the single tube semiconductor laser to be sub-luminescence unit, improves and luminous power by closing the bundle technology, and the said firm's 100 μ m core optical fibers go out luminous power and can reach 50W, NA=0.15 at present.Obviously state's infrared optical fiber coupling semiconductor laser module go out research levels such as luminous power, brightness far above domestic to this Study on Technology level.Because the encapsulation of single tube semiconductor laser and heat radiation restriction, spacing between laser and the laser can not be accomplished very little, according to existing research level, the integrated optical source that with the single tube semiconductor laser is submodule is after having adopted the space to close beam system, the packing ratio of light beam is still smaller, beam quality is relatively poor, the difficult requirement that reaches high brightness.When especially requiring luminous power higher, because integrated laser increases, cause the long-pending increase of light gasing surface, optical parameter is long-pending to be increased, and is difficult to be coupled into simple optical fiber, is restricting its development in fields such as optical fiber laser pump source, laser medicine and industrial processes.
Summary of the invention
The present invention is the problem that packing ratio is still less, beam quality is poor, optical coupling efficiency is low of integrated optical source light beam after having adopted the space to close beam system of submodule with the single tube semiconductor laser in order to solve at present, and a kind of fiber coupling system of LASER Light Source is provided.
The present invention adopts following technical scheme to realize: a kind of fiber coupling system of LASER Light Source, comprise coaxial focal element of placing successively, optical wedge array, microlens array and bundling optical fiber, and optical wedge array is placed on by position before the convergent point of the light beam after the focal element, the end face of bundling optical fiber is placed on the exit pupil position of microlens array, wedge is arranged by the mode of the corresponding light beam of a wedge in the optical wedge array, perhaps resolve in space coordinates in the angle of perpendicular and the angle of horizontal plane by the angle with light beam and optical axis, the mode that the angle of perpendicular and the angle of horizontal plane are proofreaied and correct respectively with wedge is arranged.The integrated laser light beam converges to convergent point through after the focal element, optical wedge array before the convergent point changes the direction of propagation of converging beam, make the direction of propagation of converging beam be parallel to optical axis, converging beam becomes collimated light beam, the lighting area of this collimated light beam is less than the lighting area that incides the laser beam before the focal element, promptly the light beam packing ratio through optical wedge array becomes big, and optical parameter is long-pending to be reduced, and beam quality improves; Collimated light beam passes through microlens array again, make by each lenticular collimated light beam and be imaged on the lenticular emergent pupil, the end face of bundling optical fiber is placed at the emergent pupil place, corresponding lenticular imaging point of simple optical fiber in the bundling optical fiber like this, can reach 100% and receive luminous energy, not limited by the duty ratio of bundling optical fiber.The optical wedge array of having selected for use of the invention is optimized beam quality, improved the packing ratio of light beam, it is long-pending to have reduced optical parameter, and the present invention has also selected for use microlens array to realize the multiple spot imaging of light beam simultaneously, make the light beam coupling of each picture point advance optical fiber, light beam coupling efficient height.Optical fiber coupled modes of the present invention especially are fit to the optical fiber coupling of large-area laser light beam, and the optical fiber radical can be selected according to the optical parameter of large tracts of land light beam is long-pending in the bundling optical fiber, and optical parameter is amassed bigger situation, then selects more optical fiber radical as required; The long-pending little limiting case of optical parameter is that microlens array is single lenticule, and bundling optical fiber is a simple optical fiber.
The arrangement mode of optical wedge array and microlens array is for well known to a person skilled in the art arrangement mode.
The fiber coupling system of above-mentioned a kind of LASER Light Source, focal element are condenser lens or reflection mirror array, and condenser lens and reflection mirror array are optics commonly used in the optics, can reach the convergence effect of light beam and control the cost of system.
The fiber coupling system of above-mentioned a kind of LASER Light Source, lenticule in the microlens array is a plano-convex even non-spherical lens, its clear aperature is less than 1mm, even aspheric curvature radius is less than 5mm, non-spherical lens has been eliminated spherical aberration basically, make the luminous energy of the light beam after converging concentrate, and its specification made preferably that the light beam convergence effect is better.
The fiber coupling system of above-mentioned a kind of LASER Light Source, the shape of cross section of microlens array and bundling optical fiber is identical, can guarantee that bundling optical fiber accepts the light beam at emergent pupil place fully, realize the coupling one to one of the optical fiber in light beam and the bundling optical fiber, the coupling efficiency height of light beam.
The fiber coupling system of above-mentioned a kind of LASER Light Source, optical wedge array is placed on the position that makes that each hot spot that incides the light beam on the wedge can be distinguished, light beam by optical wedge array can become collimated light beam entirely like this, and collimated light beam is again by imaging behind the microlens array.The incident light of microlens array is that collimated light beam can guarantee that also microlens array off-axis point imaging aberration is little, and promptly luminous energy is also concentrated, and can enter bundling optical fiber entirely, then the coupling efficiency height of light beam.
The fiber coupling system of above-mentioned a kind of LASER Light Source, condenser lens is the achromatism doublet objective, can be used for the multiwavelength laser coupled system, convergence effect is good.
The fiber coupling system of above-mentioned a kind of LASER Light Source, described cross section are hexagon, and cross section is the sound construction of hexagonal microlens array and bundling optical fiber.
The present invention utilizes focal element and wedge that laser beam is compressed, and makes that the optical parameter of the light beam by wedge is long-pending to reduce greatly, and the packing ratio of light beam increases, and has improved the quality of light beam; The present invention utilizes microlens array to make light beam be imaged as the characteristics of regularly arranged picture point, bundling optical fiber is placed at emergent pupil place at microlens array, bundling optical fiber is received and transmission luminous energy, satisfy of the requirement of fields such as optical fiber laser pump, laser medicine and industrial processes high-quality laser; The present invention has stipulated that also microlens array is identical with the cross section of bundling optical fiber, makes fully receiving beam of bundling optical fiber, and promptly the bundling optical fiber coupling efficiency reaches 100%; The present invention can be used for output beam area optical fiber big and the integrated laser light source that optical parameter is long-pending big and is coupled, and behind light source process focal element of the present invention and the optical wedge array, is coupled into bundling optical fiber through microlens array; Also the optical fiber of the long-pending relative less integrated laser light source of little and optical parameter is coupled applicable to the output beam area in the present invention, optical parameter is long-pending behind light source process focal element of the present invention and the optical wedge array reduces once more greatly, is coupled into simple optical fiber through single aspherical microlens.
Description of drawings
Fig. 1 for the focal element in the system be the achromatism doublet objective the time working state figure.
Working state figure when Fig. 2 is reflective mirror for the focal element in the system.
Fig. 3 is the fundamental diagram of single wedge.
Fig. 4 is light beam and optical axis included angle is olation schematic diagram.
Among the figure: 1-optical wedge array, 2-microlens array, 3-bundling optical fiber, 4-integrated laser light beam, 5-achromatism doublet objective, 6-reflection mirror array.
Embodiment
A kind of fiber coupling system of LASER Light Source, comprise coaxial focal element, optical wedge array 1, microlens array 2 and the bundling optical fiber of placing successively 3, and optical wedge array 1 is placed on by the position before the convergent point of the light beam after the focal element, and the end face of bundling optical fiber 3 is placed on the exit pupil position of microlens array 2; Wedge is arranged by the mode of the corresponding light beam of a wedge in the optical wedge array, perhaps resolve in space coordinates in the angle of perpendicular and the angle of horizontal plane by the angle with light beam and optical axis, the mode that the angle of perpendicular and the angle of horizontal plane are proofreaied and correct respectively with wedge is arranged.The fiber coupling system of above-mentioned a kind of LASER Light Source, focal element are condenser lens or reflection mirror array 6.The fiber coupling system of above-mentioned a kind of LASER Light Source, the lenticule in the microlens array 2 are plano-convex even non-spherical lens, and its clear aperature is less than 1mm, and even aspheric curvature radius is less than 5mm.The fiber coupling system of above-mentioned a kind of LASER Light Source, microlens array 2 is identical with the shape of cross section of bundling optical fiber 3.The fiber coupling system of above-mentioned a kind of LASER Light Source, optical wedge array 1 are placed on the position that makes that each hot spot that incides the light beam on the wedge can be distinguished.The fiber coupling system of above-mentioned a kind of LASER Light Source, condenser lens are achromatism doublet objective 5.The fiber coupling system of above-mentioned a kind of LASER Light Source, described cross section are hexagon.During concrete enforcement, laser beam that the single tube semiconductor laser array of arranging by the face battle array sends or the integrated laser light beam that closes beam system through the space, through converging to convergent point behind the achromatism doublet objective, converging beam is again through becoming collimated light beam behind the optical wedge array before the convergent point, collimated light beam converges in the emergent pupil place through microlens array again, and bundling optical fiber is accepted the light beam at emergent pupil place.Laser beam is through assembling to optical axis after the focal element, and generation with the angle of optical axis is
The inclination angle, the inclination angle
Can be projected as on the XOZ plane of space coordinates (horizontal plane) and YOZ plane (vertical plane)
With
When utilizing optical wedge array calibration of laser direction of beam propagation, can adopt two kinds of methods to arrange wedge: a kind of is the inclination angle of considering each laser beam respectively
, the corresponding wedge of laser beam is pressed the laser beam inclination angle
Arrange wedge, only need row's wedge this moment; A kind of is inclination angle with light beam and optical axis
Be decomposed into
With
, the laser beam that is positioned at same row or same row after the decomposition has identical
With
, therefore, adopt two row's wedges to proofread and correct respectively
With
, be positioned at the laser beam of same row or same row this moment
With
Proofread and correct together, wedge is same row or samely classify bar shaped as.
Claims (10)
1. the fiber coupling system of a LASER Light Source, it is characterized in that comprising coaxial focal element, optical wedge array (1), microlens array (2) and the bundling optical fiber of placing successively (3), and optical wedge array (1) is placed on by the position before the convergent point of the light beam after the focal element, and the end face of bundling optical fiber (3) is placed on the exit pupil position of microlens array (2); Wedge is arranged by the mode of the corresponding light beam of a wedge in the optical wedge array, perhaps resolve in space coordinates in the angle of vertical plane and the angle of horizontal plane by the angle with light beam and optical axis, the mode that the angle of vertical plane and the angle of horizontal plane are proofreaied and correct respectively with wedge is arranged.
2. the fiber coupling system of a kind of LASER Light Source according to claim 1 is characterized in that focal element is condenser lens or reflection mirror array (6).
3. the fiber coupling system of a kind of LASER Light Source according to claim 1 and 2 is characterized in that the lenticule in the microlens array (2) is a plano-convex even non-spherical lens, and its clear aperature is less than 1mm, and even aspheric curvature radius is less than 5mm.
4. the fiber coupling system of a kind of LASER Light Source according to claim 1 and 2 is characterized in that microlens array (2) is identical with the shape of cross section of bundling optical fiber (3).
5. the fiber coupling system of a kind of LASER Light Source according to claim 1 and 2 is characterized in that optical wedge array (1) is placed on the position that makes that each hot spot that incides the light beam on the optical wedge array can be distinguished.
6. the fiber coupling system of a kind of LASER Light Source according to claim 2 is characterized in that condenser lens is achromatism doublet objective (5).
7. the fiber coupling system of a kind of LASER Light Source according to claim 4 is characterized in that the cross section of described microlens array (2) and bundling optical fiber (3) is a hexagon.
8. the fiber coupling system of a kind of LASER Light Source according to claim 3 is characterized in that microlens array (2) is identical with the shape of cross section of bundling optical fiber (3).
9. the fiber coupling system of a kind of LASER Light Source according to claim 4, the position that it is characterized in that placing optical wedge array (1) is the position that makes that each hot spot that incides the light beam on the wedge can be distinguished.
10. the fiber coupling system of a kind of LASER Light Source according to claim 5 is characterized in that the cross section of microlens array (2) and bundling optical fiber (3) is a hexagon.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310124541.0A CN103219648B (en) | 2013-04-11 | 2013-04-11 | A kind of fiber coupling system of LASER Light Source |
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| CN201310124541.0A CN103219648B (en) | 2013-04-11 | 2013-04-11 | A kind of fiber coupling system of LASER Light Source |
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| CN103219648B CN103219648B (en) | 2015-08-26 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108873181A (en) * | 2017-05-11 | 2018-11-23 | 苏州旭创科技有限公司 | light path control system and optical module |
| CN109470236A (en) * | 2018-11-26 | 2019-03-15 | 中国科学院长春光学精密机械与物理研究所 | A kind of star sensor |
| CN111048989A (en) * | 2019-12-27 | 2020-04-21 | 中国科学院半导体研究所 | Optical fiber coupling output semiconductor laser |
| CN111122120A (en) * | 2019-12-31 | 2020-05-08 | 深圳市杰普特光电股份有限公司 | Adjusting device and method for fast and efficient coupling of space light |
| CN112673294A (en) * | 2018-09-18 | 2021-04-16 | 三菱电机株式会社 | Multiplexing optical system |
| CN112993741A (en) * | 2021-02-05 | 2021-06-18 | 西安炬光科技股份有限公司 | Laser module, laser device, laser insertion and sewing bundle system and method |
| CN113448106A (en) * | 2021-06-02 | 2021-09-28 | 武汉安扬激光技术有限责任公司 | Beam combiner for femtosecond pulse laser |
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| CN101707326A (en) * | 2009-07-06 | 2010-05-12 | 中国科学院长春光学精密机械与物理研究所 | Multi-single pipe light beam coupling type high-power semiconductor laser |
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Patent Citations (4)
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| US5535025A (en) * | 1994-02-01 | 1996-07-09 | Hughes Training, Inc. | Helmet mounted off axis liquid crystal display with a fiber optic wedge and a curved reflector |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108873181A (en) * | 2017-05-11 | 2018-11-23 | 苏州旭创科技有限公司 | light path control system and optical module |
| CN112673294A (en) * | 2018-09-18 | 2021-04-16 | 三菱电机株式会社 | Multiplexing optical system |
| JP2021064794A (en) * | 2018-09-18 | 2021-04-22 | 三菱電機株式会社 | Combined wave optical system |
| JP7086501B2 (en) | 2018-09-18 | 2022-06-20 | 三菱電機株式会社 | Combined wave optical system |
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| CN111048989A (en) * | 2019-12-27 | 2020-04-21 | 中国科学院半导体研究所 | Optical fiber coupling output semiconductor laser |
| CN111122120A (en) * | 2019-12-31 | 2020-05-08 | 深圳市杰普特光电股份有限公司 | Adjusting device and method for fast and efficient coupling of space light |
| CN112993741A (en) * | 2021-02-05 | 2021-06-18 | 西安炬光科技股份有限公司 | Laser module, laser device, laser insertion and sewing bundle system and method |
| CN113448106A (en) * | 2021-06-02 | 2021-09-28 | 武汉安扬激光技术有限责任公司 | Beam combiner for femtosecond pulse laser |
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| CN103219648B (en) | 2015-08-26 |
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