CN102354899A - Dual-lamp composite light-gathering cavity - Google Patents
Dual-lamp composite light-gathering cavity Download PDFInfo
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- CN102354899A CN102354899A CN2011102623624A CN201110262362A CN102354899A CN 102354899 A CN102354899 A CN 102354899A CN 2011102623624 A CN2011102623624 A CN 2011102623624A CN 201110262362 A CN201110262362 A CN 201110262362A CN 102354899 A CN102354899 A CN 102354899A
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Abstract
The invention relates to a dual-lamp composite light-gathering cavity, comprising one laser bar, two pumping lamps, two ultraviolet light filtering tubes, two light filtering sheets, two copper gold-plating cylindrical reflectors, two non-metal optical filters and two heat sinks, wherein the laser bar is a symmetric body, the two ultraviolet light filtering tubes, the two light filtering sheets, the two copper gold-plating cylindrical reflectors, the two non-metal optical filters and the two heat sinks are arranged in sequence from inside to outside, and the two copper gold-plating cylindrical reflectors and the two heat sinks are provided with water cooling channels symmetrically. The dual-lamp composite light-gathering cavity can effectively gather optical energies useful to pumping lasers on the laser bar, has preferable uniformity of energy distribution, improves the laser conversion efficiency, provides a high-power and high-beam-quality laser, and can be applied to the laser processing field widely.
Description
Technical field
The present invention relates to a kind of laser pump cavity of laser, particularly a kind of pair of lamp combined light gathering chamber.
Background technology
Round the pump cavity of High-power YAG Laser device, domestic laser producer and institute have in two directions carried out a large amount of research and developments: 1. light gathering efficiency and optically focused uniformity; 2.YAG laser bar thermal effect.
How improve aspect the light gathering efficiency and optically focused uniformity of laser condenser; The not high enough problem of optically focused inhomogeneities, reflectivity to traditional ellipse or bielliptic(al) metal light-gathering cavity; Beijing University of Technology has proposed a kind of pair of lamp diffuse reflection pottery chamber; Wuhan good inscription laser has adopted ceramic hard-pressed bale laser pump cavity; Can obtain the light gathering efficiency higher, and have advantages such as life-span length, maintenance aspect than traditional bielliptic(al) laser pump cavity.The Li Jiawei of the Central China University of Science and Technology has proposed hard-pressed bale intersected cylinder laser pump cavity, can obtain than the higher efficient of common crossing garden laser pump cavity, and better uniformity.The oval laser pump cavity of glass appears in Russia the earliest, and promptly punching is used for laser pump cavity on quartz.Its major advantage is on little spatial volume, to realize separating cooling.The outer surface reflection can be a direct reflection, also can be diffuse reflection.But the pumping homogeneity of direct reflection is very poor, and irreflexive effect is pretty good, mainly shows pumping homogeneity, cooling uniformity, optical axis aspects such as stability in time.
Aspect the thermal effect of improving laser bar, domestic relevant producer and scientific research institutions have also carried out a large amount of research and developments.The relevant producer of early stage laser has adopted the laser glass that can filter ultraviolet to do the sleeve pipe filter ultraviolet light part of pumping lamp.Sky above Hubei and Hunan laser in the two lamp laser pump cavities of liquid cooling, employing be " string also " mode that cooling water channel combines, strengthened the cooling of laser crystal bar.Also there is relevant design in Beijing University of Technology.In addition,, can increase the contact area of crystal and cooling fluid, change the mode of convective heat transfer simultaneously, reduce excellent thermal effect effectively through threading line in the side of laser bar.
North China photoelectricity had proposed a kind of glass cavity outer surface plating reflector in 2003, and the laser pump cavity outer wall is coated with semi-transparent semi-reflecting film, and useless far infrared band light and ultraviolet band light are leached.Reach the purpose that reduces the operation material thermal effect.The light of useful wave band is then through protecting the copper layer to guarantee reflecting effect in the plating of the outside in reflector.
Glazing has proposed a kind of laser condenser, and the core is exactly to insert a filter at traditional ellipse laser pump cavity axis direction, can will mainly produce the wave band filtering of heat in the pump light to working-laser material, reduces the thermal effect of operation material.
North China photoelectricity scheme in; On the one hand because there is the relation that is associated with incident angle in the optical thin film reflector that is coated with; Reflection of light effect to useful wave band is limited, and also there is the problem of reflection in copper material itself for far infrared band light on the other hand.Glazing scheme in; Filter can reflect the pumping radiation in the wave band of generation heat in the working-laser material really; But; Light energy after the reflection does not have effective release channel; Must cause that copper inwall reflector temperature rises, and the temperature rise of filter, the aging quickening in gold-plated reflector caused; Through repeatedly diffuse reflection, the interior pumping radiation of wave band that must have part generation heat gets in the laser bar once more.
Summary of the invention
Among the present invention, adopted the cylinder reflecting surface of copper gold-plated cylinder reflector and the elliptic cylinder or the face of cylinder reflecting surface of nonmetal optics filter are formed complete compound reflecting surface.Can obtain making laser bar inside-pumping light obtain uniform Energy distribution than traditional bielliptic(al) structure better energy reflecting effect.Simultaneously; Adopt filtering ultraviolet pipe+filter+nonmetal optics filter+heat sink technology, the light wave that pumping lamp is produced separates, and the light-wave energy that forms on the both direction flows; The luminous energy useful to emission laser flows along " pumping lamp → laser bar " direction, effectively focuses on the laser bar; And to the otiose light-wave energy of emission laser, then flow along " pumping lamp/filter → filter → heat sink " direction, by heat sink absorption.
The invention property ground can obtain than traditional bielliptic(al) structure better energy distributing homogeneity when reducing the laser bar thermal effect.Make the conversion efficiency of laser improve, laser output power improves, and beam quality improves.
The object of the invention exactly in order to overcome the defective of prior art, through concentrating on studies, provides a kind of two lamp combined light gatherings chamber of superpower laser.
To achieve these goals, technical scheme of the present invention is such:
Described pair of lamp combined light gathering chamber; Comprise laser bar, pumping lamp, filtering ultraviolet pipe, filter, copper gold-plated cylinder reflector, nonmetal optics filter, heat sink; It is characterized in that; Said laser bar is a laser bar, said pumping lamp, filtering ultraviolet pipe, filter, copper gold-plated cylinder reflector, nonmetal optics filter, heat sinkly is two; With the laser bar is symmetric body, from inside to outside, is followed successively by filtering ultraviolet pipe, filter, copper gold-plated cylinder reflector, nonmetal optics filter, heat sink, and according to being symmetrical set; Be concentric structure between said pumping lamp and the filtering ultraviolet pipe, the filtering ultraviolet pipe is positioned at the outside of pumping lamp; Said copper gold-plated cylinder reflector and the heat sink water-cooling channel that is equipped with.
Described a kind of pair of lamp combined light gathering chamber, it is characterized in that: said filtering ultraviolet pipe is a doped quartz material, effectively the ultraviolet light wave launched of absorptive pumping lamp.
Described a kind of pair of lamp combined light gathering chamber is characterized in that: be coated with bandpass filtering film system on the said filter, can have reflected the light wave useless to pumping laser, the light wave that transmissive is useful to pumping laser.
Described a kind of pair of lamp combined light gathering chamber is characterized in that: the material of said nonmetal optics filter is quartzy or sapphire.
Described a kind of pair of lamp combined light gathering chamber, it is characterized in that: the inner surface of said nonmetal optics filter is elliptic cylinder or cylindrical shape.
Described a kind of pair of lamp combined light gathering chamber is characterized in that: be coated with the logical reflection filter film of band system on the said nonmetal optics filter, can have reflected the light wave useful to pumping laser, the light wave that transmissive is useless to pumping laser.
Described a kind of pair of lamp combined light gathering chamber is characterized in that: said heat sinkly be made up of high heat conductivity metal, oxide treatments is carried out on its surface, can effectively absorb the light wave that sees through nonmetal optics filter, and not have residual reflection.
Described a kind of pair of lamp combined light gathering chamber is characterized in that: the face of cylinder reflecting surface of said copper gold-plated cylinder reflector and the elliptic cylinder reflecting surface of nonmetal optics filter or face of cylinder reflecting surface form the compound reflecting surface of sealing.
Described a kind of pair of lamp combined light gathering chamber is characterized in that: the indium film that is provided with high-termal conductivity between the marginal portion of said filter and the copper gold-plated cylinder reflector.
Owing to adopted above technical scheme, beneficial effect of the present invention is:
1. the present invention makes the energy of pump light source in laser pump cavity, form the energy stream of both direction: the luminous energy useful to pumping laser flows along " pumping lamp → laser bar " direction, effectively focuses on the laser bar; And to the otiose luminous energy of emission laser, then flow along " pumping lamp/filter → filter → heat sink " direction, by heat sink absorption.
2. compare with traditional bielliptic(al) post laser pump cavity, have the better energy distributing homogeneity.Thereby make the laser output mode better.
3. compare with traditional ceramic chamber and the copper laser pump cavity of bielliptic(al) post, reduce greatly, thereby effectively improved laser because the hot-quenching that the temperature rising produces is gone out owing to get into the energy of the generation heat energy of laser bar.Improve laser-conversion efficiency, improved laser output power.
4. the present invention cooperates the type design of suitable chamber, can be widely used in high power laser light processing, in particular for the multikilowatt laser cutting machine, the laser of high power, high light beam quality is provided.
Description of drawings
The two lamp combined light gathering cavity configuration sketch mapes of Fig. 1
Embodiment
A kind of pair of lamp combined light gathering chamber; Comprise laser bar 1; Pumping lamp 2-1 and pumping lamp 2-2; Copper gold-plated cylinder reflector 3-1 and copper gold-plated cylinder reflector 3-2; Filtering ultraviolet pipe 4-1 and filtering ultraviolet pipe 4-2; Filter 5-1 and filter 5-2; Nonmetal optics filter 6-1 and nonmetal optics filter 6-2; Heat sink 7-1 and heat sink 7-2; Filter 5-1 and filter 5-2 are the quartzy material of twin polishing; Be coated with bandpass filtering film system; Can reflect the useless light wave of emission laser; Transmissive is to the useful light wave of emission laser; The material of nonmetal optics filter 6-1 and the nonmetal optics filter of nonmetal optics filter 6-2 is quartzy or sapphire; Inner surface is processed into the optical polish face; The face type is an elliptic cylinder; Be coated with the logical reflection filter film of band system; Can reflect the useful light wave of emission laser, transmissive is to the useless light wave of emission laser.
The light that pumping lamp 2-1 and pumping lamp 2-2 are launched; Respectively through after ultraviolet filtering pipe 4-1 and the filtration of 4-2 ultraviolet filtering pipe; Pass through respectively again by copper gold-plated cylinder reflector 3-1 and copper gold-plated cylinder reflector 3-2; Filter 5-1 and filter 5-2; The reflective-transmissive filtering system that nonmetal optics filter 6-1 and nonmetal optics filter 6-2 are formed, the energy that forms both direction flows: the light-wave energy stream 8-1 useful to laser pumping; The useful light-wave energy of laser pumping is flowed 8-2 and the light-wave energy stream 9-1 useless to laser pumping; The light-wave energy stream 9-2 useless to laser pumping.Reflect focalization face reflect focalization to the useful light-wave energy of laser pumping flows 8-1 and the useful light-wave energy stream 8-2 of laser pumping is then formed through the face of cylinder reflecting surface reflection of copper gold-plated cylinder reflector 3-1 and copper gold-plated cylinder reflector 3-2, nonmetal optics filter 6-1 and nonmetal optics filter 6-2 respectively incides respectively in the laser bar 1; The useless light-wave energy of laser pumping is flowed 9-1 and the light-wave energy stream 9-2 then respectively transmission of face of cylinder reflecting surface reflection, nonmetal optics filter 6-1 and the nonmetal optics filter 6-2 of the face of cylinder reflecting surface of process filter 5-1 and the reflection of filter 5-2, copper gold-plated cylinder reflector 3-1 and copper gold-plated cylinder reflector 3-2 useless to laser pumping, absorb by heat sink 7-1 and heat sink 7-2 respectively.The heat that heat sink 7-1 and heat sink 7-2 absorbed is taken away by the cooling water flow among water-cooling channel 10-1 and the water-cooling channel 10-2 separately, and copper gold-plated cylinder reflector 3-1 and copper gold-plated cylinder reflector 3-2 are cooled off with water-cooling channel 10-4 by inner water-cooled path 10-3 separately.Filter 5-1, filter 5-2 are provided with indium film 11-1, indium film 11-2, indium film 11-3 and indium film 11-4 respectively and between copper gold-plated cylinder reflector 3-1 and the copper gold-plated cylinder reflector 3-2.
Obviously; Those skilled in the art can carry out various changes and distortion to the present invention and not break away from the spirit and scope of the present invention; Belong within claim of the present invention and the scope with technology thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1. two lamp combined light gathering chamber; Comprise laser bar, pumping lamp, filtering ultraviolet pipe, filter, copper gold-plated cylinder reflector, nonmetal optics filter, heat sink; It is characterized in that; Said laser bar is a laser bar, said pumping lamp, filtering ultraviolet pipe, filter, copper gold-plated cylinder reflector, nonmetal optics filter, heat sinkly is two; With the laser bar is symmetric body, from inside to outside, is followed successively by filtering ultraviolet pipe, filter, copper gold-plated cylinder reflector, nonmetal optics filter, heat sink, and according to being symmetrical set; Be concentric structure between said pumping lamp and the filtering ultraviolet pipe, the filtering ultraviolet pipe is positioned at the outside of pumping lamp; Said copper gold-plated cylinder reflector and the heat sink water-cooling channel that is equipped with.
2. a kind of pair of lamp combined light gathering chamber according to claim 1, it is characterized in that: said filtering ultraviolet pipe is a doped quartz material.
3. a kind of pair of lamp combined light gathering chamber according to claim 1 is characterized in that: be coated with bandpass filtering film system on the said filter.
4. a kind of pair of lamp combined light gathering chamber according to claim 1 is characterized in that: the material of said nonmetal optics filter is quartzy or sapphire.
5. according to claim 1 or 4 described a kind of pair of lamp combined light gathering chambeies, it is characterized in that: the inner surface of said nonmetal optics filter is elliptic cylinder or cylindrical shape.
6. a kind of pair of lamp combined light gathering chamber according to claim 1 is characterized in that: be coated with the logical reflection filter film of band system on the said nonmetal optics filter.
7. a kind of pair of lamp combined light gathering chamber according to claim 1 is characterized in that: said heat sinkly be made up of high heat conductivity metal, oxide treatments is carried out on its surface.
8. a kind of pair of lamp combined light gathering chamber according to claim 1 is characterized in that: the face of cylinder reflecting surface of said copper gold-plated cylinder reflector and the elliptic cylinder reflecting surface of nonmetal optics filter or face of cylinder reflecting surface form the compound reflecting surface of sealing.
9. a kind of pair of lamp combined light gathering chamber according to claim 1 is characterized in that: the indium film that is provided with high-termal conductivity between the marginal portion of said filter and the copper gold-plated cylinder reflector.
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| CN2011102623624A CN102354899A (en) | 2011-09-06 | 2011-09-06 | Dual-lamp composite light-gathering cavity |
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| CN2011102623624A CN102354899A (en) | 2011-09-06 | 2011-09-06 | Dual-lamp composite light-gathering cavity |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751651A (en) * | 2012-07-05 | 2012-10-24 | 昆山浦力金属工业有限公司 | Novel pump cavity body |
| CN104852265A (en) * | 2015-06-10 | 2015-08-19 | 湖北工业大学 | High-efficiency holmium laser |
| CN110112641A (en) * | 2019-05-27 | 2019-08-09 | 苏州亿帝电子科技有限公司 | A kind of solid state laser laser pump cavity and solid state laser |
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| US4485482A (en) * | 1980-01-07 | 1984-11-27 | Oy Nokia Ab | Apparatus for generating a laser pulse |
| JPS60239078A (en) * | 1984-05-11 | 1985-11-27 | Toshiba Corp | Solid-state laser oscillator |
| CN1909307A (en) * | 2006-07-14 | 2007-02-07 | 北京工业大学 | Design method and device for high power solid laser pumping light reflecting surface |
| CN101841121A (en) * | 2010-05-07 | 2010-09-22 | 华中科技大学 | Light focusing cavity of laser |
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2011
- 2011-09-06 CN CN2011102623624A patent/CN102354899A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4485482A (en) * | 1980-01-07 | 1984-11-27 | Oy Nokia Ab | Apparatus for generating a laser pulse |
| JPS60239078A (en) * | 1984-05-11 | 1985-11-27 | Toshiba Corp | Solid-state laser oscillator |
| CN1909307A (en) * | 2006-07-14 | 2007-02-07 | 北京工业大学 | Design method and device for high power solid laser pumping light reflecting surface |
| CN101841121A (en) * | 2010-05-07 | 2010-09-22 | 华中科技大学 | Light focusing cavity of laser |
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| 薛友苏等: "激光器漫反射型陶瓷聚光腔", 《激光技术》, 28 August 1988 (1988-08-28) * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102751651A (en) * | 2012-07-05 | 2012-10-24 | 昆山浦力金属工业有限公司 | Novel pump cavity body |
| CN104852265A (en) * | 2015-06-10 | 2015-08-19 | 湖北工业大学 | High-efficiency holmium laser |
| CN104852265B (en) * | 2015-06-10 | 2017-11-28 | 湖北工业大学 | A kind of high efficiency holmium laser |
| CN110112641A (en) * | 2019-05-27 | 2019-08-09 | 苏州亿帝电子科技有限公司 | A kind of solid state laser laser pump cavity and solid state laser |
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