CN103389157A - High-energy laser beam expanding and absorbing device - Google Patents
High-energy laser beam expanding and absorbing device Download PDFInfo
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- CN103389157A CN103389157A CN2013103209175A CN201310320917A CN103389157A CN 103389157 A CN103389157 A CN 103389157A CN 2013103209175 A CN2013103209175 A CN 2013103209175A CN 201310320917 A CN201310320917 A CN 201310320917A CN 103389157 A CN103389157 A CN 103389157A
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Abstract
The invention discloses a high-energy laser beam expanding and absorbing device which comprises a laser beam expanding cone, an energy absorption cavity, a front panel and a fixing plate, wherein the energy absorption cavity adopts a hollow cylinder; the front panel is arranged at a laser incident end of the energy absorption cavity, and the fixing plate is arranged at the rear end of the energy absorption cavity and used for fixing the laser beam expanding cone; and the laser beam expanding cone comprises a pointed beam expanding cone, at least two spherical beam expanding cones and cylinder transition sections which are arranged in the laser incident direction sequentially, and radii of cylinders of the cylinder transition sections are increased gradually in the laser incident direction. The laser beam expanding cone simultaneously realizes beam expanding of incident laser beams in the length direction and the circumference direction of the absorption cavity, and effectively reduces the power density of laser shot to a heat absorption cylinder by the laser beam expanding cone; and by means of the high-energy laser beam expanding and absorbing device, absorption and conduction of hundred thousand joules to a megajoule of high-power laser energy of continuous waves are realized, the measuring accuracy of an energy meter is improved greatly, and the device has wide applicability.
Description
Technical field
The present invention relates to a kind of energy measurement of high energy laser for Laser calorimeter and absorb cavity, relate in particular to a kind of absorption plant that expands of superlaser.
Background technology
High-energy laser refers to that average power, greater than myriawatt, several seconds duration, the laser instrument of output energy more than tens thousand of joules, has important industry and Military Application prospect.The output energy of high-energy laser is the important parameter that characterizes laser effect, and the gross energy that usually adopts calorimetry to export high-energy laser carries out absolute measurement.Its principle is that after incident laser energy is absorbed the body absorption, transform light energy is heat energy, calculates the gross energy of incident laser by measuring the absorber temperature rise.
The superlaser facula area is large, go out luminous energy and power density is very high, and measurement mechanism is had certain destructiveness, brings very large difficulty for the energy absolute measurement.for realizing the absolute measurement of superlaser output gross energy, domestic many units have developed hypersorption formula measurement of laser energy device, wherein the laser beam expanding absorption piece is the critical component in energy measuring apparatus, in October, 2008, No. 200810231820, the invention disclosed patent, a kind of laser reflection expanding cone and manufacture method thereof are disclosed, it comprises at least two hollow conical surface reflecting segments and at least one the hollow cylindrical conical surface linkage section that is used for connecting two adjacent conical reflecting sections, the conical reflecting section is included in a pyramid type conical reflecting section and at least one circular platform type conical reflecting section that the incident direction of laser beam incident bundle sets gradually, the conical surface of each conical reflecting section all equates with the angle of the incident direction of laser beam incident bundle, the outside surface of conical reflecting section is coated with high-reflecting film, this invention has solved existing laser reflection and has expanded processing difficulties, poor reliability, the technical matters of poor expandability, but the laser reflection face of this device is non-cambered surface, incident laser is not launched at cavity length direction, and not in conjunction with the energy absorption cavity design, form a complete absorption plant that expands.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of Continuous high-energy laser energy and expands absorption plant, reduce as far as possible the laser power density that arrives the thermal absorption unit, and guarantee further to improve and measure range under the prerequisite to laser energy safety and evenly absorption.
Technical solution of the present invention is:
A kind of superlaser expands absorption plant, comprise laser beam expanding cone, energy absorption chamber, front panel and fixed head, wherein the energy absorption chamber is hollow cylinder, and front panel is arranged on the sharp light incident side in energy absorption chamber, centre has sharp incident light hole, swashs incident light hole over against expanding cone; Fixed head is arranged on the rear end in energy absorption chamber, is used for the fixed laser expanding cone;
Laser beam expanding cone comprises that of setting gradually along the laser incident direction expands pointed cone, at least two and expands ball cone and cylinder transition section, and along the cylinder radius of the cylinder transition sections at different levels of laser incident direction, increases step by step; Expand pointed cone and expand ball cone and be hollow-core construction, the laser beam expanding poppet surface is coated with highly reflecting films.
Above-mentioned superlaser expands in absorption plant, and the cylinder inwall in energy absorption chamber is processed with the energy absorption groove, and the chemical treatment of energy absorption rooved face process is to improve the laser energy absorption rate.
Above-mentioned superlaser expands in absorption plant, and the radius-of-curvature that expand the ball cone along laser incident direction at different levels increase step by step.
Above-mentioned superlaser expands in absorption plant, and laser beam expanding cone is split-type structural, by the screw thread that arranges in the cylinder transition section and seal groove, realizes adjacently expanding pointed cone and expanding connection between the ball cone, and seal groove is provided with zero RunddichtringO.
Above-mentioned superlaser expands in absorption plant, and the periphery that reaches the energy absorption chamber in the cavity of laser beam expanding cone has cooling liquid to flow through.
Above-mentioned superlaser expands in absorption plant, and front panel is coated with high reflection silverskin towards the surface in energy absorption chamber.
Above-mentioned superlaser expands in absorption plant, and the surface working of fixed head cylinder towards the energy absorption chamber has serrate energy absorption groove, and the chemical treatment of energy absorption rooved face process is to improve the laser energy absorption rate.
Above-mentioned superlaser expands in absorption plant, and the material of laser beam expanding cone is copper or aluminium.
Above-mentioned superlaser expands in absorption plant, and the material in energy absorption chamber is copper, aluminium or graphite.
Above-mentioned superlaser expands in absorption plant, and the surface of laser beam expanding cone is coated with golden film.
The present invention has following beneficial effect:
1, the present invention has realized absorption and the conduction of the continuous wave height energy of 100,000 joules～megajoule level laser energy, has greatly improved the measuring accuracy of energy meter, and has had applicability widely.
2, laser beam expanding of the present invention cone comprise expand pointed cone and transition layer by layer expand the ball cone, be coated with highly reflecting films on the laser beam expanding cone, reduced on the one hand the power density that is incident to the laser beam expanding poppet surface, realize simultaneously incoming laser beam in the length of absorbing cavity and expanding of circumference both direction, effectively reduced the laser power density that is incident to the thermal absorption cylindrical shell through the laser beam expanding cone.
3, laser beam expanding cone of the present invention adopts split-type structural, has facilitated the processing of centrum, and the centrum surface is coated with reflectance coating simultaneously, has improved the ability of tolerance laser irradiation.
4, front panel of the present invention surface is coated with high reflection silverskin, can again reflex to the energy absorption chamber and fixed head absorbs to parasitic light in the energy absorption chamber, has improved laser absorption rate, thereby has strengthened the energy measurement precision.
5, the surface working of energy absorption chamber of the present invention and fixed head has the energy absorption groove, and the energy absorption rooved face has further improved the laser energy absorption rate through chemical treatment.
Description of drawings
Accompanying drawing 1 is laser beam expanding absorption plant structural representation of the present invention;
Accompanying drawing 2 is the structural representation of energy absorption groove in energy absorption of the present invention chamber;
Accompanying drawing 3 expands the structural representation of pointed cone for the present invention;
Accompanying drawing 4 expands the structural representation of ball cone for the first order of the present invention;
Accompanying drawing 5 expands the structural representation of ball cone for the second level of the present invention.
1-laser beam expanding cone; 2-energy absorption chamber; 3-fixed head; 4-front panel; 5-energy absorption groove; 6-incoming laser beam; 7-laser entrance port; 8-reflection lasering beam; 9-cylinder transition section; 10-expand pointed cone; 11-first order expands the ball cone; 12-second level expands the ball cone.
Embodiment
Conventional High Energy Laser Energy Meter is based on the hypersorption measuring principle, when the photothermal measurement unit such as incident superlaser arrival absorbing cavity, the photothermal measurement unit absorbs incident laser energy and transforms self temperature rise, utilize array of temperature sensor to change and measure in real time the photothermal measurement cell temperature, the last temperature signal that array of temperature sensor is measured by the data acquisition process unit records and processes, and finally obtains the gross energy of incident superlaser.
Being applied to high power, while going out photo measure for a long time, the tolerance laser irradiation ability of energy absorbing device is very crucial, the present invention proposes a kind of energy measurement of high energy laser that is applied in the energy measurement of high energy laser measurement mechanism and expand absorption plant, comprise laser beam expanding cone 1, energy absorption chamber 2, front panel 4 and fixed head 3.
Front panel 4 is arranged on the sharp light incident side in energy absorption chamber 2, and centre has the sharp incident light hole 7 over against expanding cone 1; Fixed head 3 is arranged on the rear end in energy absorption chamber, and laser beam expanding cone 1 is fixed on fixed head 3, is carved with seal groove on fixed head 3, and zero RunddichtringO is installed in seal groove,, in fastening middle generation deformation, makes to expand cone and fixed head is tightly connected.
Laser beam expanding cone 1 comprises that of setting gradually along the laser incident direction expands pointed cone 10, at least two and expands ball cone 11,12 and cylinder transition section 9, and along the cylinder radius of the cylinder transition sections 9 at different levels of laser incident direction, increases step by step; Expand pointed cone 10 and expand ball cone 11,12 and be hollow-core construction, whole laser beam expanding cone 1 surface is coated with highly reflecting films., expand cone and make laser irradiation after the length in energy absorption chamber and circumferencial direction launch on the wall of energy absorption chamber, reach the purpose of decay laser power density when swashing incident light hole 7 incident when laser.
Laser beam expanding cone 1 is the critical component of this device, use oxygen-free copper is made, according to testing requirement, simultaneously for convenience of machining and installation, expanding cone is comprised of multistage, expand the cone first order and be transitioned into sphere by pinnacle, expand the spherical surface body of cone subsequent stages for gradually increasing, Fig. 3 to Fig. 5 has provided and has expanded pointed cone 10, the first order and expand ball cone 11, the second level and expand the structural representation of ball cone 12.Utilize connecting thread, sealed groove and the RunddichtringO of being connected closely to connect between at different levels, the current of salable certain pressure.Expand the surface of cone, particularly pinnacle and land portions, use vapour deposition method to be coated with the golden film of high reflection after polishing, to the reflectivity of incident laser higher than 95%, the 12kW/cm of anti-the laser-damaged threshold value
2Above.
Further, as a kind of optimal way, fixed head 3 uses duralumin to make, one side in chamber is designed with energy absorption groove 5, and absorption cell is zigzag structure, and its shape is consistent with Fig. 2, the surperficial melanism of fixed head 3, but in fixed laser reflection cone ABSORPTION AND SCATTERING light; Front panel 4 adopts duralumin to make, and towards the mirror polish in chamber, surface is coated with high reflection silverskin, scattering can be returned in chamber by the laser reflection on it, laser energy is fully absorbed, to improve measuring accuracy.
The present invention is not limited to above-mentioned embodiment, and such as for different hot spots, cavity and laser beam expanding cone shape, large I are made suitable change; Expanding cone can be also that otherwise close-connected two-stage at least expands sphere, makes material and can select oxygen-free copper, import brass or rafifinal, and surperficial high reflecting metal rete can take evaporation coating method or chemical method to be coated with golden film or silverskin; The purpose of design energy absorption cell 5 is to increase S. E. A., and grooved can have different angles to change; Above variation is all in protection scope of the present invention.
Claims (10)
1. a superlaser expands absorption plant, comprise laser beam expanding cone (1), energy absorption chamber (2), front panel (4) and fixed head (3), it is characterized in that: described energy absorption chamber (2) is hollow cylinder, described front panel (4) is arranged on the sharp light incident side in energy absorption chamber (2), centre has sharp incident light hole (7), and described sharp incident light hole is over against expanding cone (1); Described fixed head (3) is arranged on the rear end in energy absorption chamber, is used for fixed laser expanding cone (1);
Described laser beam expanding cone (1) comprises that of setting gradually along the laser incident direction expands pointed cone (10), at least two and expands ball cone (11,12) and cylinder transition section (9), and along the cylinder radius of the cylinder transition sections at different levels (9) of laser incident direction, increases step by step; Described expand pointed cone (10) and expand ball cone (11,12) be hollow-core construction, described laser beam expanding cone (1) surface is coated with highly reflecting films.
2. superlaser according to claim 1 expands absorption plant, it is characterized in that: the cylinder inwall in described energy absorption chamber (2) is processed with zigzag energy absorption groove (5), and the process chemical treatment of described energy absorption groove (5) surface is to improve the laser energy absorption rate.
3. superlaser according to claim 1 expands absorption plant, it is characterized in that: the described radius-of-curvature that expand ball cone (11) at different levels along the laser incident direction increase step by step.
4. superlaser according to claim 1 expands absorption plant, it is characterized in that: described laser beam expanding cone (1) is split-type structural, realize adjacently expanding pointed cone (10) and expanding connection between ball cone (11,12) by the screw thread that arranges in the cylinder transition section and seal groove, described seal groove is provided with zero RunddichtringO.
5. superlaser according to claim 1 expands absorption plant, it is characterized in that: the periphery that reaches energy absorption chamber (2) in the cavity of described laser beam expanding cone (1) has cooling liquid to flow through.
6. superlaser according to claim 1 expands absorption plant, it is characterized in that: described front panel (4) is coated with high reflection silverskin towards the surface of energy absorption chamber (2).
7. superlaser according to claim 1 expands absorption plant, it is characterized in that: the surface working of described fixed head cylinder towards energy absorption chamber (2) has zigzag energy absorption groove (5), and the process chemical treatment of described energy absorption groove (5) surface is to improve the laser energy absorption rate.
8. superlaser according to claim 1 expands absorption plant, it is characterized in that: the material of described laser beam expanding cone (1) is copper or aluminium.
9. superlaser according to claim 1 expands absorption plant, it is characterized in that: the material in described energy absorption chamber (2) is copper, aluminium or graphite.
10. superlaser according to claim 1 expands absorption plant, it is characterized in that: the surface of described laser beam expanding cone (1) is coated with golden film.
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| CN201310320917.5A CN103389157B (en) | 2013-07-26 | 2013-07-26 | High-energy laser beam expanding and absorbing device |
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| CN201310320917.5A CN103389157B (en) | 2013-07-26 | 2013-07-26 | High-energy laser beam expanding and absorbing device |
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| CN103389157B CN103389157B (en) | 2015-05-20 |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048755A (en) * | 2014-05-21 | 2014-09-17 | 西北核技术研究所 | Total absorption superlaser energy meter |
| CN104133295A (en) * | 2014-08-20 | 2014-11-05 | 南京中科神光科技有限公司 | Laser beam absorption device |
| CN104165690A (en) * | 2014-09-04 | 2014-11-26 | 中国工程物理研究院应用电子学研究所 | Calibration device for high-energy laser energy meter |
| CN108957767A (en) * | 2018-07-16 | 2018-12-07 | 湖北三江航天红林探控有限公司 | High power light energy choking device |
| CN109244814A (en) * | 2018-09-27 | 2019-01-18 | 深圳市杰普特光电股份有限公司 | Laser splitting device |
| CN109861063A (en) * | 2019-04-09 | 2019-06-07 | 武汉锐科光纤激光技术股份有限公司 | A kind of laser strike-machine device |
| CN111637967A (en) * | 2020-04-30 | 2020-09-08 | 中国工程物理研究院应用电子学研究所 | Universal solid absorption type high-energy laser energy measuring probe |
| CN113654692A (en) * | 2021-08-12 | 2021-11-16 | 四川激束光电仪器有限公司 | Laser power detector based on double-surface temperature measurement |
| US11255723B2 (en) | 2016-08-05 | 2022-02-22 | Primes Gmbh | Beam power measurement with widening |
| DE102016015843B3 (en) | 2016-08-05 | 2022-03-10 | Primes GmbH Meßtechnik für die Produktion mit Laserstrahlung | Beam power measurement with widening using a lens array |
| CN114235349A (en) * | 2021-12-07 | 2022-03-25 | 中国科学院合肥物质科学研究院 | Composite absorber structure of full-absorption high-energy laser energy meter |
| CN114566860A (en) * | 2022-04-28 | 2022-05-31 | 中国工程物理研究院应用电子学研究所 | Laser absorption device and laser |
| CN115235617A (en) * | 2022-08-31 | 2022-10-25 | 中国工程物理研究院激光聚变研究中心 | Laser power measuring system and measuring method |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104048755B (en) * | 2014-05-21 | 2015-11-18 | 西北核技术研究所 | A kind of hypersorption High Energy Laser Energy Meter |
| CN104048755A (en) * | 2014-05-21 | 2014-09-17 | 西北核技术研究所 | Total absorption superlaser energy meter |
| CN104133295A (en) * | 2014-08-20 | 2014-11-05 | 南京中科神光科技有限公司 | Laser beam absorption device |
| CN104165690A (en) * | 2014-09-04 | 2014-11-26 | 中国工程物理研究院应用电子学研究所 | Calibration device for high-energy laser energy meter |
| US11255723B2 (en) | 2016-08-05 | 2022-02-22 | Primes Gmbh | Beam power measurement with widening |
| DE102016015843B3 (en) | 2016-08-05 | 2022-03-10 | Primes GmbH Meßtechnik für die Produktion mit Laserstrahlung | Beam power measurement with widening using a lens array |
| CN108957767A (en) * | 2018-07-16 | 2018-12-07 | 湖北三江航天红林探控有限公司 | High power light energy choking device |
| CN109244814A (en) * | 2018-09-27 | 2019-01-18 | 深圳市杰普特光电股份有限公司 | Laser splitting device |
| CN109861063B (en) * | 2019-04-09 | 2024-02-13 | 武汉锐科光纤激光技术股份有限公司 | Laser copying device |
| CN109861063A (en) * | 2019-04-09 | 2019-06-07 | 武汉锐科光纤激光技术股份有限公司 | A kind of laser strike-machine device |
| CN111637967A (en) * | 2020-04-30 | 2020-09-08 | 中国工程物理研究院应用电子学研究所 | Universal solid absorption type high-energy laser energy measuring probe |
| CN113654692A (en) * | 2021-08-12 | 2021-11-16 | 四川激束光电仪器有限公司 | Laser power detector based on double-surface temperature measurement |
| CN113654692B (en) * | 2021-08-12 | 2023-09-29 | 四川激束光电仪器有限公司 | Laser power detector based on double-surface temperature measurement |
| CN114235349A (en) * | 2021-12-07 | 2022-03-25 | 中国科学院合肥物质科学研究院 | Composite absorber structure of full-absorption high-energy laser energy meter |
| CN114566860A (en) * | 2022-04-28 | 2022-05-31 | 中国工程物理研究院应用电子学研究所 | Laser absorption device and laser |
| CN115235617A (en) * | 2022-08-31 | 2022-10-25 | 中国工程物理研究院激光聚变研究中心 | Laser power measuring system and measuring method |
| CN115235617B (en) * | 2022-08-31 | 2022-12-20 | 中国工程物理研究院激光聚变研究中心 | Laser power measuring system and measuring method |
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