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Proceedings Paper

Annular coaxial waveguide CO2 laser with rf discharge and diffusion cooling
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Paper Abstract

It has been proved that gain volume scaling can be successfully applied to achieve high output power and a compact design. The waveguide material is metallic and diffusion-cooled, thus heat removal is more efficient. It is easy for the annular system consisting of two coaxial tubes to keep in shape and maintain mechanical stability. Annular gain media offer large gain volume with short axial dimensions. The resonator structure, principles of gain volume scaling and characteristics of the output power are presented in this paper. The outer diameter of annular waveguide walls is 20mm; an output power of 75W at wavelength 10.6µm has been obtained from a guide gap of 2.25mm and a gain length of 150mm. The annularly shaped output beam can be used directly for making holes. Moreover, according to its axisymmetrical structure and the law of refraction, by using two small prisms of the exact same material, it is possible to transform the annular beam into a solid beam by careful selection of the incident angle. Further, the diameter of the annular beam varies once the space between two prisms is changed.

Paper Details

Date Published: 5 September 2002
PDF: 4 pages
Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); doi: 10.1117/12.481829
Show Author Affiliations
Yuanfang Lin, Zhejiang Univ. (China)
Yuanqing Huang, Xiamen Univ. (China)

Published in SPIE Proceedings Vol. 4914:
High-Power Lasers and Applications II
Dianyuan Fan; Keith A. Truesdell; Koji Yasui, Editor(s)

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