CN203012245U - Beam coupling and focusing device for laser diode array - Google Patents
Beam coupling and focusing device for laser diode array Download PDFInfo
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- CN203012245U CN203012245U CN 201220394808 CN201220394808U CN203012245U CN 203012245 U CN203012245 U CN 203012245U CN 201220394808 CN201220394808 CN 201220394808 CN 201220394808 U CN201220394808 U CN 201220394808U CN 203012245 U CN203012245 U CN 203012245U
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- collimation unit
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Abstract
The utility model discloses a beam coupling and focusing device for a laser diode array. The beam coupling and focusing device comprises the laser diode array, a fast axis collimation unit and a slow axis collimation unit which are sequentially placed along the forward direction of beams, wherein a toric reflecting mirror and an optical axis are placed at a certain included angle; and a laser beam receiving device is positioned at a focal point of the toric reflecting mirror. The beam coupling and focusing device can couple and focus the beams emitted by the laser diode array, can be used in optical fiber coupling and can be applied to coupling pumped solid laser. The beam coupling and focusing device has the advantages of simple structure, convenience installation, small insertion loss, and high coupling efficiency.
Description
Technical field
The utility model relates to diode laser matrix beam shaping and coupling, is specifically related to the device of a kind of diode laser matrix light beam coupling and solid laser pump coupling.
Background technology
In recent years, Development of Laser Technology is rapid, is widely applied to the fields such as scientific research, national defence, communication, medical treatment, industry manufacturing, laser display.And applications of laser will constantly expand to the every aspect of our life.The pump light source that is used for Solid State Laser generally has two kinds: xenon lamp or krypton lamp and laser diode.Laser diode has many characteristics such as volume is little, lightweight, efficient is high, the life-span is long and can directly modulate.In some field, the Solid State Laser take laser diode as pumping source just progressively replaces the Solid State Laser take traditional xenon lamp as pumping source.Aspect some commercial Application, directly the process equipment take diode laser as light source also increases severely with day.
Due to some self inherent shortcoming, the power of the laser diode of single tube can't meet the requirement of concrete application; And in some practical application in the urgent need to powerful diode laser light source or pumping source, therefore many laser diodes must be coupled to together, to satisfy application request.Diode laser matrix is exactly a kind of light source that can satisfy these application request, and it is generally formed a line by 8～20 laser diode transmitter units and forms.There is very large asymmetry in the laser diode laser beam of single tube, and its light-emitting area is generally 1 * 50 μ m
2To 1 * 400 μ m
2, its fast axle full-shape angle of divergence is generally 40 ° of left and right, and the slow axis full-shape angle of divergence is 10 ° of left and right, and the angle of divergence differs 3～4 times between the two.The light-emitting area of diode laser matrix is generally 1 μ m * 1cm (or more than), and the space distribution of its laser beam has huge asymmetry.
Usually, diode laser matrix will reach the requirement of practical application, all must carry out optical shaping to diode laser matrix, i.e. compression, the fast axle of shaping diode laser matrix and the angle of divergence of slow axis.Optimal state is that its laser beam shaping is become equally distributed square focus spot.Prior art CN101078850 and CN20105402 have added the such diffraction optical device of benhain prism microplate reshaper to obtain equally distributed hot spot in the shaping process, but the insertion loss of this shaping methods is large.The prior art CN1744395 single lenticule of employing unit compresses the angle of divergence of fast axle and slow axis simultaneously, but its design is complicated, processing difficulties, and the device alignment error is large.
The utility model content
The purpose of this utility model is to overcome the shortcoming of above-mentioned prior art, the diode laser matrix that provides a kind of light beam coupling focalizer of diode laser matrix to comprise to place successively along the light beam working direction, fast axis collimation unit, slow axis collimation unit, double-curved surface catoptron and laser beam receiving trap, it is characterized in that, described diode laser matrix, fast axis collimation unit, slow axis collimation unit is arranged in parallel, after described double-curved surface mirror tilt was positioned at slow axis collimation unit, the laser beam receiving trap was in the focus place of double-curved surface catoptron.
Further, described diode laser matrix is formed a line side by side by 8-20 laser diode transmitter unit and forms.
Further, described fast axis collimation unit is refraction optical element, and described fast axis collimation unit is post lens or optical fiber lens.
Further, described fast axis collimation cell surface is coated with the deielectric-coating that laser is had high permeability.
Further, described slow axis collimation unit is refraction optical element, and described slow axis collimation unit comprises the short lenticule of a plurality of columns, and the short lenticule of column is corresponding one by one with laser diode in the laser diode lens arra.
Further, described slow axis collimation cell surface is coated with the deielectric-coating that laser is had high permeability.
Further, described double-curved surface catoptron is coated with the deielectric-coating that laser is had high reflectance on receiving plane.
Further, the angle of the normal of described double-curved surface catoptron and incident beam is between 1～45 degree.
Further, described laser beam receiving trap is optical fiber or laser crystal, and described optical fiber or laser crystal surface are coated with the deielectric-coating that laser is had high permeability.
In addition, the present invention also provides a kind of light beam coupling focalizer of diode laser matrix, comprise the diode laser matrix placed successively along the light beam working direction, slow axis collimation unit, fast axis collimation unit, double-curved surface catoptron and laser beam receiving trap, it is characterized in that, described diode laser matrix, slow axis collimation unit, fast axis collimation unit is arranged in parallel, after described double-curved surface mirror tilt was positioned at the fast axis collimation unit, the laser beam receiving trap was positioned at the focus place of double-curved surface catoptron.
Further, described diode laser matrix is formed a line side by side by 8-20 laser diode transmitter unit and forms.
Further, described fast axis collimation unit is refraction optical element, and described fast axis collimation unit is post lens or optical fiber lens.
Further, described fast axis collimation cell surface is coated with the deielectric-coating that laser is had high permeability.
Further, described slow axis collimation unit is refraction optical element, and described slow axis collimation unit comprises the short lenticule of a plurality of columns, and the short lenticule of column is corresponding one by one with laser diode in the laser diode lens arra.
Further, described slow axis collimation cell surface is coated with the deielectric-coating that laser is had high permeability.
Further, described double-curved surface catoptron has identical or different radius-of-curvature on x axle and y axle, be coated with the deielectric-coating that laser is had high reflectance on receiving plane.
Further, the angle of the normal of described double-curved surface catoptron and incident beam is between 1～45 degree.
Further, described laser beam receiving trap is optical fiber or laser crystal, and described optical fiber or laser crystal surface are coated with the deielectric-coating that laser is had high permeability.
The beneficial effects of the utility model are, the first, and what fast axis collimation unit and slow axis collimation unit adopted is refraction optical element, to compare insertion loss little with diffraction optical element; The second, it is two independently structures that fast axis collimation unit and slow axis collimate the unit, respectively fast axial light bundle and slow axis beam is carried out compression shaping, can freely select according to actual needs and make up, and have higher coupling efficiency; The 3rd, what focusing optic adopted is the double-curved surface catoptron, has increased the structural compactness of whole system; The 4th, the utility model processing is simple, is easy to install.
Description of drawings
Fig. 1 is the schematic perspective view of diode laser matrix light beam coupling focalizer in embodiment 1.
Fig. 2 is the vertical view of diode laser matrix light beam coupling focalizer in embodiment 1.
Fig. 3 is the vertical view of diode laser matrix light beam coupling focalizer in embodiment 2.
Fig. 4 is fast axis collimation unit three-dimensional schematic diagram.
Fig. 5 is slow axis collimation unit three-dimensional schematic diagram.
Fig. 6 is the rough schematic view of double-curved surface catoptron single-point imaging.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is done further explaination.
The fast axis collimation unit is positioned at slow axis collimation unit scheme before along optical path direction, as depicted in figs. 1 and 2, the light beam coupling focalizer of the present embodiment comprises: the diode laser matrix 1 that is arranged in order along the Laser emission direction, fast axis collimation unit 2, slow axis collimation unit 3, double-curved surface catoptron 4, laser beam receiving trap 5.
Wherein, diode laser matrix 1 is formed a line by 8-20 laser diode transmitter unit and forms, there is very large asymmetry in the laser beam of single laser diode emission, its fast axle full-shape angle of divergence is generally 40 ° of left and right, the slow axis full-shape angle of divergence is generally 10 ° of left and right, therefore, the space distribution of the laser beam of diode laser matrix emission has very large asymmetry, for reaching application request, diode laser matrix 1 needs through optical shaping, the fast axle angle of divergence and the slow axis angle of divergence to be compressed.
fast axis collimation unit 2 adopts refraction optical element, can select lens pillar or optical fiber lens, the concrete fast axis collimation unit 2 of using in the present embodiment is lens pillar, as shown in Figure 4, fast axis collimation unit 2 and diode laser matrix 1 horizontal direction parallel, fast axis collimation unit 2 is the focal length of the lens of fast axis collimation unit 2 employings with the distance of diode laser matrix 1, laser beam that diode laser matrix 1 sends through fast axis collimation unit 2 after, fast axial light Shu Fasheng refraction, the fast axle angle of divergence is compressed, the fast axial light bundle is shaped as parallel beam, the transmit direction of light beam and diode laser matrix 1 and fast axis collimation unit 2 perpendicular directions, and slow axis beam can be freely by not reflecting, advance along original optical path.
slow axis collimation unit 3 adopts refraction optical element, slow axis in the present embodiment collimates unit 3 and adopts column slow axis column lens array, as shown in Figure 5, slow axis collimation unit 3 comprises the short lenticule of a plurality of columns, the perpendicular direction of the short lenticular cylinder direction of column and fast axis collimation unit 2, the short lenticule of column is corresponding one by one with laser diode in laser diode lens arra 1, the short lenticular quantity of column is no less than the quantity of the laser diode in laser diode lens arra 1, slow axis collimation unit 3 is that slow axis collimates the short lenticular focal length of column in unit 3 with the distance of diode laser matrix 1, the laser beam that diode laser matrix 1 sends is after fast axis collimation unit 2 shapings, through slow axis collimation unit 3, slow axis beam reflects, the slow axis scattering angle is compressed, slow axis beam is shaped as parallel beam, the transmit direction of light beam and diode laser matrix 1 and fast axis collimation unit 2 perpendicular directions, and can be freely by not reflecting through the fast axle parallel beam of fast axis collimation unit 2 shapings, advance along original optical path.
When the light beam process fast axis collimation unit 2 that diode laser matrix 1 sends and slow axis collimation unit 3, the light beam of transmission can not return along light path, for the light beam of avoiding returning damages diode laser matrix 1, fast axis collimation unit 2 and slow axis collimate 3 surfaces, unit and all are coated with the deielectric-coating that laser is had high permeability, after process fast axis collimation unit 2 and slow axis collimated unit 3, it was rectangular hot spot that the light beam that diode laser matrix 1 sends is shaped as xsect.
double-curved surface catoptron 4 carries out reflect focalization with the light beam that has different scattering angle on its x axle and y direction of principal axis, the laser beam that diode laser matrix 1 sends should be a branch of parallel beam in theory after fast axis collimation unit 2 and unit 3 shapings of slow axis collimation, but in fact the laser beam after shaping all has certain dispersion angle on double-curved surface catoptron x axle and y direction of principal axis, the normal of double-curved surface catoptron and Laser emission optical axis direction are 1-45 ° of angle, Fig. 6 is double-curved surface catoptron single-point imaging schematic diagram, the light that pointolite o sends has certain angle of divergence, focus on o ' through double-curved surface catoptron 4, double-curved surface catoptron 4 surfaces are coated with the deielectric-coating that laser is had high reflectance, when being coupled focusing with double-curved surface catoptron 4, laser beam receiving trap 5 can be put from axle, the position of laser beam receiving trap 5 does not need and diode laser matrix 1, fast axis collimation unit 2, Beam rotation array 3 point-blank, make the structure of whole device compacter, be convenient to the Miniaturization Design of device.
Laser beam receiving trap 5 for receiving the receiving trap of the laser beam after double-curved surface catoptron 4 focuses on, can be optical fiber or laser crystal, and laser beam receiving trap 5 is positioned at the focus place through double-curved surface catoptron 4, receives and is shaped light beam.
Light-beam forming unit principle of work in the present embodiment is as follows: diode laser matrix 1 Emission Lasers, and launch at fast axle and have the fast axial light bundle of certain scattering angle and the slow axis beam that has certain scattering angle on slow axis; The fast axial light bundle of fast axis collimation unit 2 collimation laser diode arrays 1, slow axis beam can freely pass through without refraction; The slow axis beam of slow axis collimation unit 3 collimation laser diode arrays 1, the fast axial light bundle can freely pass through without refraction; By selecting suitable technical parameter, it is rectangular light beam that diode laser matrix 1 is shaped to an area of beam after by fast axis collimation unit 2 and slow axis collimation unit 3 in theory; Certain angle that tilts this light beam incides to be reflected after double-curved surface catoptron 4 and focuses on laser beam receiving trap 5.
Slow axis collimation unit is positioned at fast axis collimation unit scheme before along optical path direction, as shown in Figure 3, the light beam coupling focalizer of the present embodiment comprises: the diode laser matrix 1 that is arranged in order along the Laser emission direction, slow axis collimation unit 3, fast axis collimation unit 2, double-curved surface catoptron 4, laser beam receiving trap 5.
Wherein, diode laser matrix 1 is formed a line by 8-20 laser diode transmitter unit and forms, there is very large asymmetry in the laser beam of single laser diode emission, its fast axle full-shape angle of divergence is generally 40 ° of left and right, the slow axis full-shape angle of divergence is generally 10 ° of left and right, therefore, the space distribution of the laser beam of diode laser matrix emission has very large asymmetry, for reaching application request, diode laser matrix 1 needs through optical shaping, the fast axle angle of divergence and the slow axis angle of divergence to be compressed.
slow axis collimation unit 3 adopts refraction optical element, slow axis in the present embodiment collimates unit 3 and adopts column slow axis column lens array, as shown in Figure 5, slow axis collimation unit 3 comprises the short lenticule of a plurality of columns, the short lenticular cylinder direction of column is vertical with diode laser matrix 1 horizontal direction, the short lenticule of column is corresponding one by one with laser diode in laser diode lens arra 1, the short lenticular quantity of column is no less than the quantity of the laser diode in laser diode lens arra 1, slow axis collimation unit 3 is that slow axis collimates the short lenticular focal length of column in unit 3 with the distance of diode laser matrix 1, the laser beam that diode laser matrix 1 sends is through slow axis collimation unit 3, slow axis beam reflects, the slow axis scattering angle is compressed, slow axis beam is shaped as parallel beam, and the fast axial light bundle is not freely by reflecting, advance along original optical path.
fast axis collimation unit 2 adopts refraction optical element, can select lens pillar or optical fiber lens, the concrete fast axis collimation unit 2 of using in the present embodiment is lens pillar, as shown in Figure 4, fast axis collimation unit 2 and diode laser matrix 1 horizontal direction parallel, fast axis collimation unit 2 is the focal length of the lens of fast axis collimation 2 employings with the distance of diode laser matrix 1, the laser beam that diode laser matrix 1 sends is after fast axis collimation unit 3 shapings, behind process fast axis collimation unit 2, fast axial light Shu Fasheng refraction, the fast axle angle of divergence is compressed, the fast axial light bundle is shaped as parallel beam, the transmit direction of light beam and diode laser matrix 1 and fast axis collimation unit 2 perpendicular directions, and the slow axis beam after unit 3 shapings of slow axis collimation can be freely by not reflecting, advance along original optical path.
When the light beam process fast axis collimation unit 2 that diode laser matrix 1 sends and slow axis collimation unit 3, the light beam of transmission can not return along light path, for the light beam of avoiding returning damages diode laser matrix 1, fast axis collimation unit 2 and slow axis collimate 3 surfaces, unit and all are coated with the deielectric-coating that laser is had high permeability, behind slow axis collimation unit 3 and fast axis collimation unit 2, it is rectangular hot spot that the light beam that diode laser matrix 1 sends is shaped as xsect.
double-curved surface catoptron 4 carries out reflect focalization with the light beam that has different scattering angle on its x axle and y direction of principal axis, the laser beam that diode laser matrix 1 sends should be a branch of parallel beam in theory after slow axis collimation unit 3 and fast axis collimation unit 2 shapings, but in fact the laser beam after shaping all has certain dispersion angle on double-curved surface catoptron x axle and y direction of principal axis, the normal of double-curved surface catoptron and Laser emission optical axis direction are 1-45 ° of angle, Fig. 6 is double-curved surface catoptron single-point imaging schematic diagram, the light that pointolite o sends has certain angle of divergence, focus on o ' through double-curved surface catoptron 4, double-curved surface catoptron 4 surfaces are coated with the deielectric-coating that laser is had high reflectance, when being coupled focusing with double-curved surface catoptron 4, laser beam receiving trap 5 can be put from axle, the position of laser beam receiving trap 5 does not need and diode laser matrix 1, fast axis collimation unit 2, Beam rotation array 3 point-blank, make the structure of whole device compacter, be convenient to the Miniaturization Design of device.
Laser beam receiving trap 5 for receiving the receiving trap of the laser beam after double-curved surface catoptron 4 focuses on, can be optical fiber or laser crystal, and laser beam receiving trap 5 is positioned at the focus place through double-curved surface catoptron 4, receives and is shaped light beam.
Light-beam forming unit principle of work in the present embodiment is as follows: diode laser matrix 1 Emission Lasers, and launch at fast axle and have the fast axial light bundle of certain scattering angle and the slow axis beam that has certain scattering angle on slow axis; The slow axis beam of slow axis collimation unit 3 collimation laser diode arrays 1, the fast axial light bundle can freely pass through without refraction; The fast axial light bundle of fast axis collimation unit 2 collimation laser diode arrays 1, slow axis beam can freely pass through without refraction; By selecting suitable technical parameter, diode laser matrix 1 collimates by slow axis that to be shaped in theory an area of beam behind unit 3 and fast axis collimation unit 2 be rectangular light beam; Certain angle that tilts this light beam incides to be reflected after double-curved surface catoptron 4 and focuses on laser beam receiving trap 5.
Above-described embodiment of the present invention does not consist of the restriction to protection domain of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present invention.
Claims (10)
1. the light beam coupling focalizer of a diode laser matrix, comprise the diode laser matrix placed successively along the light beam working direction, fast axis collimation unit, slow axis collimation unit, double-curved surface catoptron and laser beam receiving trap, it is characterized in that, described diode laser matrix, fast axis collimation unit, slow axis collimation unit is arranged in parallel, after described double-curved surface mirror tilt was positioned at slow axis collimation unit, described laser beam receiving trap was positioned at the focus place of double-curved surface catoptron.
2. the light beam coupling focalizer of a diode laser matrix, comprise the diode laser matrix placed successively along the light beam working direction, slow axis collimation unit, fast axis collimation unit, double-curved surface catoptron and laser beam receiving trap, it is characterized in that, described diode laser matrix, slow axis collimation unit, fast axis collimation unit is arranged in parallel, after described double-curved surface mirror tilt was positioned at the fast axis collimation unit, described laser beam receiving trap was positioned at the focus place of double-curved surface catoptron.
3. light beam coupling focalizer according to claim 1 and 2, is characterized in that, described diode laser matrix is formed a line side by side by 8-20 laser diode transmitter unit and forms.
4. light beam coupling focalizer according to claim 1 and 2, is characterized in that, described fast axis collimation unit is refraction optical element, and described fast axis collimation unit is post lens or optical fiber lens.
5. light beam coupling focalizer according to claim 4, is characterized in that, described fast axis collimation cell surface is coated with the deielectric-coating that laser is had high permeability.
6. light beam coupling focalizer according to claim 1 and 2, it is characterized in that, described slow axis collimation unit is refraction optical element, described slow axis collimation unit comprises the short lenticule of a plurality of columns, and the short lenticule of column is corresponding one by one with laser diode in the laser diode lens arra.
7. light beam coupling focalizer according to claim 6, is characterized in that, described slow axis collimation cell surface is coated with the deielectric-coating that laser is had high permeability.
8. light beam coupling focalizer according to claim 1 and 2, is characterized in that, described double-curved surface catoptron is coated with the deielectric-coating that laser is had high reflectance on receiving plane.
9. light beam coupling focalizer according to claim 8, is characterized in that, the normal of described double-curved surface catoptron and the angle of incident beam are between 1～45 degree.
10. light beam coupling focalizer according to claim 1 and 2, is characterized in that, described laser beam receiving trap is optical fiber or laser crystal, and described optical fiber or laser crystal surface are coated with the deielectric-coating that laser is had high permeability.
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|---|---|---|---|
| CN 201220394808 CN203012245U (en) | 2012-08-10 | 2012-08-10 | Beam coupling and focusing device for laser diode array |
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| CN 201220394808 CN203012245U (en) | 2012-08-10 | 2012-08-10 | Beam coupling and focusing device for laser diode array |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2016166313A1 (en) * | 2015-04-16 | 2016-10-20 | Osram Opto Semiconductors Gmbh | Optoelectronic lamp device |
| CN106249422A (en) * | 2016-09-28 | 2016-12-21 | 北京万集科技股份有限公司 | Multichannel beam treatment optical system and processing method, multi-path laser detector |
| CN109119884A (en) * | 2017-06-23 | 2019-01-01 | 友嘉科技股份有限公司 | The encapsulating structure of semiconductor laser |
| CN114172015A (en) * | 2021-12-08 | 2022-03-11 | 深圳市星汉激光科技股份有限公司 | Focusing coupling light path of semiconductor laser |
| CN116540416A (en) * | 2023-07-04 | 2023-08-04 | 杭州海康威视数字技术股份有限公司 | Laser collimation system |
-
2012
- 2012-08-10 CN CN 201220394808 patent/CN203012245U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016166313A1 (en) * | 2015-04-16 | 2016-10-20 | Osram Opto Semiconductors Gmbh | Optoelectronic lamp device |
| CN107431329A (en) * | 2015-04-16 | 2017-12-01 | 奥斯兰姆奥普托半导体有限责任公司 | Photoelectricity lamp apparatus |
| CN107431329B (en) * | 2015-04-16 | 2020-04-28 | 奥斯兰姆奥普托半导体有限责任公司 | Photoelectric lamp equipment |
| CN106249422A (en) * | 2016-09-28 | 2016-12-21 | 北京万集科技股份有限公司 | Multichannel beam treatment optical system and processing method, multi-path laser detector |
| WO2018058741A1 (en) * | 2016-09-28 | 2018-04-05 | 北京万集科技股份有限公司 | Multipath light beam processing optical system and processing method therefor, and multipath laser detector |
| CN109119884A (en) * | 2017-06-23 | 2019-01-01 | 友嘉科技股份有限公司 | The encapsulating structure of semiconductor laser |
| CN114172015A (en) * | 2021-12-08 | 2022-03-11 | 深圳市星汉激光科技股份有限公司 | Focusing coupling light path of semiconductor laser |
| CN116540416A (en) * | 2023-07-04 | 2023-08-04 | 杭州海康威视数字技术股份有限公司 | Laser collimation system |
| CN116540416B (en) * | 2023-07-04 | 2023-09-19 | 杭州海康威视数字技术股份有限公司 | Laser collimation system |
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Granted publication date: 20130619 Termination date: 20210810 |