CN103078248A - Laser beam collimation adjusting method and device for high-power semiconductor - Google Patents
Laser beam collimation adjusting method and device for high-power semiconductor Download PDFInfo
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- CN103078248A CN103078248A CN2012105914113A CN201210591411A CN103078248A CN 103078248 A CN103078248 A CN 103078248A CN 2012105914113 A CN2012105914113 A CN 2012105914113A CN 201210591411 A CN201210591411 A CN 201210591411A CN 103078248 A CN103078248 A CN 103078248A
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Abstract
The invention relates to a laser beam collimation adjusting method and a laser beam collimation adjusting device for a high-power semiconductor. The method comprises the following steps of lightening a semiconductor laser; enabling light beams emitted by each luminous point to pass through a fast-axis collimating mirror and a slow-axis collimating mirror in sequence respectively, and enter a volume Bragg grating (VBG); guiding laser light entering the VBG into a spectrometer for performing spectrum test; adjusting the fast-axis collimating mirror and the flow-axis collimating mirror respectively till a spectrum tested by using the spectrometer becomes narrower remarkably; enabling laser light emitted by the semiconductor laser to pass through a fast axis and a flow axis to become collimated ight beams; and fixing the positions of the fast-axis collimating mirror and the flow-axis collimating mirror. Due to the adoption of the laser beam collimation adjusting method and the laser beam collimation adjusting device, the high-precision collimation property of multiple paths of light beams can be adjusted in a compact space; and meanwhile, a spectrum narrowing signal is easy to identify, and whether a light path is collimated or not can be judged easily.
Description
Technical field
The invention belongs to field of semiconductor lasers, relate to a kind of high-power semiconductor laser beam collimation method of adjustment and device.
Background technology
At present the fiber coupling system of semiconductor laser is towards the future development of high-output power, high brightness, and obtains using more and more widely in the field such as industrial, medical, military.For improving the high power high luminance output of semiconductor laser, the mode that people take multiple luminous point to be carried out coupling fiber usually realizes, namely by first a plurality of luminous points being collimated, the multichannel light beam after will collimating again converges in the simple optical fiber through condenser lens and exports.In the process that the propagation path to a plurality of luminous points collimates, usually adopt dual mode: mode one, photodetector in costlinesses such as CCD arranges reference point, carry out imaging to CCD in the segment distance after luminous point is propagated, regulate the fast and slow axis collimating mirror, when luminous point when imaging and reference point overlap on CCD, multiple luminous point collimation is complete; Mode two, on direction of beam propagation before and after mobile CCD so that luminous point is imaged on the CCD in former and later two positions, regulate the fast and slow axis collimating mirror, when luminous point when front and back two positions place two imaging points overlap, multiple luminous point collimates complete.
Above-mentioned two kinds of methods include three deficiencies significantly: 1) expensive; The CCD that uses in this alignment method is expensive, and also more than units up to ten thousand, the CCD camera that precision is higher is expensive especially for common technical grade CCD camera; 2) precision is low; The upper reference point of a kind of CCD of method selected be in the situation that between the supposition multi-illuminating unit relative distance be certain, yet the relative distance between the actual multi-illuminating unit there are differences, collimating precision can reduce for this reason greatly; 3) complicated operation; Alignment procedure in the method two must carry out in one section quite long distance, and distance is longer, and the collimation precision is just higher, for this reason inconvenient operation.
Summary of the invention
The object of the invention is to overcome the shortcoming of above-mentioned technology, a kind of high-power semiconductor laser beam collimation method of adjustment and device are provided, to realize the realizing high-precision collimation of multichannel light beam in the space of compactness, the spectrum narrowing signal distinguishing is simple simultaneously, easily whether judges beam path alignment.
The present invention is a kind of exocoel reaction type multiple beam collimation adjustment method and device based on body grating (VBG), mainly is by surveying multiple beam through the spectrum of the rear laser of body grating (VBG) exocoel feedback output, monitoring and regulate the fast and slow axis collimating mirror.When multiple beam can collimate propagation between semiconductor laser and VBG, with respect to the spectrum that does not collimate under the propagation condition, output spectrum can narrow a lot.
Control method of the present invention specifically may further comprise the steps:
Step 1: light semiconductor laser, the light beam that each luminous point sends by after fast axle, the slow axis collimating mirror, incides body grating (VBG) successively;
Step 2: the laser lead-in light spectrometer that will be incident to behind the body grating (VBG) carries out spectrum test;
Step 3: regulate respectively fast axle, slow axis collimating mirror, significantly narrow until the photometry of spectrometer institute is composed now, then the laser launched of semiconductor laser is collimated light beam after through speed, slow axis;
Step 4: fixing fast axle, slow axis collimating mirror position.
Based on above method, the exocoel reaction type multiple beam collimation adjusting device based on body grating (VBG) that the present invention proposes, this adjusting device comprises: installation base plate and be arranged on the installation base plate the laser mounting and in order to adjust respectively and the fixedly adjustment means of fast axis collimation mirror, slow axis collimating mirror position and body grating (VBG), light collector, the light-conducting system that sets gradually along the laser emitting light path, pass through light-conducting system lead-in light spectrometer through the body grating transmission and by the laser that light collector is collected.
Above-mentioned adjustment means adopts sextuple adjusting bracket to grip fast axle, slow axis collimating mirror.Certainly, also can adopt other conventional fixed forms of installing.
Above-mentioned light collector can be lens, set of lenses, integrating sphere etc.
Above-mentioned light-conducting system can be optical fiber, photoconductive tube, fiber waveguide etc.
When adjusting the semiconductor laser beam collimation, semiconductor laser is placed on the laser mounting, fast axle with semiconductor laser, the slow axis collimating mirror is clamped in respectively on two sextuple adjusting brackets, light semiconductor laser, light beam will be fast, be incident to body grating (VBG) behind the slow axis collimating mirror, part light is by body grating (VBG) reflection and through fast, the slow axis collimating mirror feeds back in the laser chamber, form the light reponse system, the light of transmission transfers in the spectrometer with light-conducting system after light collector is collected, but spectrometer test spectral, adjusting two sextuple adjusting brackets is used for regulating fast, the position of slow axis collimating mirror, when spectrometer tests out spectrum and occurs obviously narrowing, then the laser launched of semiconductor laser is through speed, be collimated light beam behind the slow axis, fixing fast axle, the relative position of slow axis collimating mirror and semiconductor laser.
The present invention can realize adjusting the high-precision collimation of multichannel light beam in the space of compactness, and the spectrum narrowing signal distinguishing is simple simultaneously, easily whether judges beam path alignment.Adjusting device of the present invention is easy to adjust, simple, the collimation precision is high, feasible.
Description of drawings
Fig. 1 is high-power semiconductor laser light beam adjusting device structural representation of the present invention.
Wherein, 1 is installation base plate; 2 is the laser mounting; 3,4 is sextuple adjusting bracket; 5 is body grating (VBG); 6 is light collector; 7 is light-conducting system; 8 is spectrometer; 9 is semiconductor laser; 10 is the fast axis collimation mirror; 11 is the slow axis collimating mirror.
Fig. 2 shows the spectrum contrast situation of apparatus of the present invention before and after multiple beam is collimated of using.
Embodiment
Below in conjunction with accompanying drawing invention is further described.
As shown in Figure 1, the method for adjustment of a kind of high-power semiconductor laser light beam of the present invention is as follows
Step 1: light semiconductor laser 9, the light beam that semiconductor laser 9 sends by after fast axis collimation mirror 10, the slow axis collimating mirror 11, incides body grating (VBG) 5 successively;
Step 2: the laser lead-in light spectrometer 8 that will be incident to behind the grating (VBG) 5 carries out spectrum test;
Step 3: regulate respectively fast axis collimation mirror 10, slow axis collimating mirror 11, significantly narrow until 8 photometries of spectrometer are composed now, then the laser launched of semiconductor laser 9 through fast axis collimation mirror 10, slow axis collimating mirror 11 collimations after after be collimated light beam;
Step 4: the fixing position of fast axis collimation mirror 10 and slow axis collimating mirror 11.
High-power semiconductor laser light beam adjusting device of the present invention comprises installation base plate 1 and is arranged on laser mounting 2 on the installation base plate 1, two sextuple adjusting brackets 3,4, body grating (VBG) 5, at body grating (VBG) 5 emergent light places light collector 6 is set, light-conducting system 7 is set in light collector 6 rear ends is used for deriving light, spectrometer 8 is connected to and is used for test spectral on the light-conducting system 7.
During high-power semiconductor laser light beam adjusting device work of the present invention, the needs semiconductor laser 9 of adjusting that collimates is placed on the laser mounting 2, the fast axis collimation mirror 10 of semiconductor laser 9 is clamped on the sextuple adjusting bracket 3, the slow axis collimating mirror 11 of semiconductor laser 9 is clamped on the sextuple adjusting bracket 4, light semiconductor laser, light beam will be fast, be incident to body grating (VBG) 5 behind the slow axis collimating mirror, part light is by body grating (VBG) 5 reflections and through fast, the slow axis collimating mirror feeds back in semiconductor laser 9 chambeies, form the light reponse system, the light of transmission is collected through light collector 6 and is transferred in the spectrometer 8 by light-conducting system 7, but spectrometer 8 test spectral, regulate sextuple adjusting bracket 3,4 are used for regulating the position of fast axis collimation 10 mirrors and slow axis collimating mirror 11, when spectrometer 8 tests out spectrum and occurs obviously narrowing, then the laser launched of semiconductor laser 9 is through fast axis collimation mirror 10, be collimated light beam behind the slow axis collimating mirror 11, fixedly the fast axis collimation mirror 10, the relative position of slow axis collimating mirror 11 and semiconductor laser 9.
The present embodiment uses method of the present invention and device to adjust single bar semiconductor laser that clings to that the collimation laser device is emission wavelength 808nm.
Fig. 2 provides the spectrum contrast situation before and after single bar bar semiconductor laser collimation of adjusting this emission wavelength 808nm, as we can see from the figure, spectrum narrows significantly, can infer on Physical Mechanism, and the multi-pass light beam has collimated and formed the exocoel feedback oscillation fully.As seen, this adjusting device can make things convenient for, realize accurately the multiple beam collimation.
Claims (5)
1. high-power semiconductor laser beam collimation method of adjustment may further comprise the steps:
1) light semiconductor laser, the light beam that each luminous point sends by after fast axle, the slow axis collimating mirror, incides body grating (VBG) successively;
The laser lead-in light spectrometer that 2) will be incident to behind the body grating (VBG) carries out spectrum test;
3) regulate respectively fast axle, slow axis collimating mirror, significantly narrow until the photometry of spectrometer institute is composed now, then the laser launched of semiconductor laser is collimated light beam after through speed, slow axis;
4) fixing fast axle, slow axis collimating mirror position.
2. the exocoel reaction type multiple beam based on body grating (VBG) collimates adjusting device, it is characterized in that: comprise installation base plate and be arranged on the installation base plate the laser mounting and in order to adjust respectively and the fixedly adjustment means of fast axis collimation mirror, slow axis collimating mirror position and body grating (VBG), light collector, the light-conducting system that sets gradually along the laser emitting light path, pass through light-conducting system lead-in light spectrometer through the body grating transmission and by the laser that light collector is collected.
3. exocoel reaction type multiple beam according to claim 2 collimates adjusting device, and it is characterized in that: described adjustment means adopts sextuple adjusting bracket to grip fast axle, slow axis collimating mirror.
4. exocoel reaction type multiple beam according to claim 2 collimates adjusting device, and it is characterized in that: described light collector is lens, set of lenses or integrating sphere.
5. exocoel reaction type multiple beam collimation adjusting device according to claim 2 is characterized in that: described light-conducting system employing optical fiber, photoconductive tube or fiber waveguide.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374414A (en) * | 2014-12-09 | 2015-02-25 | 国家电网公司 | Fiber Bragg grating demodulating system based on volume holographic grating |
| CN104701732A (en) * | 2014-07-02 | 2015-06-10 | 长春理工大学 | External-cavity wide-strip semiconductor laser cavity mode selection method |
| CN104701733A (en) * | 2014-07-02 | 2015-06-10 | 长春理工大学 | Wide-strip-shaped semiconductor laser cavity mode selecting method |
| CN107180560A (en) * | 2017-07-12 | 2017-09-19 | 北京中科冠达科技有限公司 | Hold up traffic suggestion device and prompt system of holding up traffic |
| CN108152909A (en) * | 2017-12-25 | 2018-06-12 | 北京凯普林光电科技股份有限公司 | A kind of device and method of grating in adjusting capsulation structure for semiconductor laser |
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| US20050018743A1 (en) * | 2003-07-03 | 2005-01-27 | Volodin Boris Leonidovich | Use of volume Bragg gratings for the conditioning of laser emission characteristics |
| US20070268572A1 (en) * | 2006-05-20 | 2007-11-22 | Newport Corporation | Multiple emitter coupling devices and methods with beam transform system |
| CN102183359A (en) * | 2011-02-23 | 2011-09-14 | 浙江大学 | Method and device for detecting collimation of light beams |
| CN203071396U (en) * | 2012-12-28 | 2013-07-17 | 西安炬光科技有限公司 | High-power semiconductor laser beam collimation and adjustment device |
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2012
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20050018743A1 (en) * | 2003-07-03 | 2005-01-27 | Volodin Boris Leonidovich | Use of volume Bragg gratings for the conditioning of laser emission characteristics |
| US20070268572A1 (en) * | 2006-05-20 | 2007-11-22 | Newport Corporation | Multiple emitter coupling devices and methods with beam transform system |
| CN102183359A (en) * | 2011-02-23 | 2011-09-14 | 浙江大学 | Method and device for detecting collimation of light beams |
| CN203071396U (en) * | 2012-12-28 | 2013-07-17 | 西安炬光科技有限公司 | High-power semiconductor laser beam collimation and adjustment device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701732A (en) * | 2014-07-02 | 2015-06-10 | 长春理工大学 | External-cavity wide-strip semiconductor laser cavity mode selection method |
| CN104701733A (en) * | 2014-07-02 | 2015-06-10 | 长春理工大学 | Wide-strip-shaped semiconductor laser cavity mode selecting method |
| CN104374414A (en) * | 2014-12-09 | 2015-02-25 | 国家电网公司 | Fiber Bragg grating demodulating system based on volume holographic grating |
| CN107180560A (en) * | 2017-07-12 | 2017-09-19 | 北京中科冠达科技有限公司 | Hold up traffic suggestion device and prompt system of holding up traffic |
| CN107180560B (en) * | 2017-07-12 | 2024-02-02 | 北京中科冠达科技有限公司 | Car stopping prompt device and car stopping prompt system |
| CN108152909A (en) * | 2017-12-25 | 2018-06-12 | 北京凯普林光电科技股份有限公司 | A kind of device and method of grating in adjusting capsulation structure for semiconductor laser |
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| CN103078248B (en) | 2016-08-31 |
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Address after: 710077 high power semiconductor laser Industrial Park, Shaanxi, Xi'an, Shaanxi Province, No. 86, No. 56 Patentee after: FOCUSLIGHT TECHNOLOGIES INC. Address before: 710119 high tech Zone, Shaanxi, Xi'an new industrial park information Avenue, building 17, building three, floor 10 Patentee before: Xi'an Focuslight Technology Co., Ltd. |