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Proceedings Paper

Blackbody-pumped CO2 lasers using Gaussian and waveguide cavities
Author(s): Jim J. Chang; Walter H. Christiansen
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Paper Abstract

A large scale pulsed laser system with heated tantalum foils as the blackbody pumping source was built in the laboratory. A deeper understanding of the effects of pumping configurations and laser modes on the blackbody pumped CO2 laser has been achieved through parametric studies using this system. Theoretical analysis and experimental investigation show the feasibility of a slab pumping scheme which may be applied to large scale transverse flow laser systems. The use of an 8 mm tube with waveguide quality enables generation of both gaussian and waveguide modes in the same structure with different optics setup. The experiment demonstrates that high waveguide cavity losses can be prevented with large bore structure (> 4 mm) and the advantage of better filling of the laser gain region by waveguide modes is clearly observed. The size scaling studies also indicate that there are similarity relations of the optimum laser parameters between different sizes of tube in optically pumped gas lasers.

Paper Details

Date Published: 1 May 1991
PDF: 14 pages
Proc. SPIE 1412, Gas and Metal Vapor Lasers and Applications, (1 May 1991); doi: 10.1117/12.43644
Show Author Affiliations
Jim J. Chang, Lawrence Livermore National Lab. (United States)
Walter H. Christiansen, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 1412:
Gas and Metal Vapor Lasers and Applications
Jin J. Kim; Frank K. Tittel, Editor(s)

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