Binary optics beam mode transformer and its application in high-power laser processing

Wenjin Liu; Yangxiang Li; Jie Zhao; Haicheng Zhang; ShuShen Deng; Pin Long; Yansong Cheng

doi:10.1117/12.317891

15 August 1998 Binary optics beam mode transformer and its application in high-power laser processing

Wenjin Liu, Yangxiang Li, Jie Zhao, Haicheng Zhang, ShuShen Deng, Pin Long, Yansong Cheng

Proceedings Volume 3550, Laser Processing of Materials and Industrial Applications II; (1998) https://doi.org/10.1117/12.317891
Event: Photonics China '98, 1998, Beijing, China

Abstract

Based on the newly developed binary optics, a new kind of optics device used for laser beam mode transforming has been developed. This kind of binary optics device is worked with the principle of optical diffraction. It can be used to transform very efficiently the beam mode of high power laser of long wavelength. Using such a binary optics device of GaAs, a circle beam of high power CO₂ laser can be transformed into a line-shaped narrow beam with uniform power distribution. Using this device to do the treatments of laser hardening, alloying and cladding, the treating efficiency can be greatly increased. A very uniform strengthening layer in hardening depth, hardness and microstructure can be obtained. The tempering effect, which will occur in the overlapped region when treating a large area with the common overlapping process, can be avoided.

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Wenjin Liu, Yangxiang Li, Jie Zhao, Haicheng Zhang, ShuShen Deng, Pin Long, and Yansong Cheng "Binary optics beam mode transformer and its application in high-power laser processing", Proc. SPIE 3550, Laser Processing of Materials and Industrial Applications II, (15 August 1998); https://doi.org/10.1117/12.317891

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KEYWORDS

Diffraction

High power lasers

Laser development

Transformers

Heat treatments

Laser drilling

Gallium arsenide

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