High power laser beam shaping for welding applications by means of diffractive elements

被引：1
|
作者：
Bourgin, Yannick [1 ]
Nagel, Falk [2 ]
Fesser, Patrick [1 ]
Bergmann, Jean-Pierre [2 ]
Sinzinger, Stefan [1 ]
机构：
[1] TU Ilmenau, Fachgebiet Tech Opt, PF 10 05 65, D-98684 Ilmenau, Germany
[2] TU Ilmenau, Fachgebiet Fertigungstech, PF 10 05 65, D-98684 Ilmenau, Germany
来源：
LASER BEAM SHAPING XVIII | 2018年 / 10744卷
关键词：
Diffractive Optical Element; high-power laser; solid state laser; optics design; welding application; material processing; ALGORITHM;
D O I：
10.1117/12.2320579
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Laser welding by means of multi-kilowatt solid state lasers can be considerably improved if the focused welding spot is embedded in a pre-heating spot generated e.g. by an additional laser. To improve the compactness of the optical system, the same functionality can be effectively achieved by means of diffractive diffusers. Because such a diffractive optical solution may suffer from the presence of speckles, a comprehensive characterization of the laser source is performed. The paper includes the design, the compensation of the difference in the intensity levels, the fabrication and the optical performances of the fabricated DOEs. We furthermore present the functionality of the DOEs in the welding process.
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页数：7
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