A 30 cm long waveguide made of two specularly reflecting water-cooled brass plates was built for use with a 3 kw CO2 laser beam focused with telescopes having numerical apertures ranging between f/7 and f/150. In order to improve the collection efficiency a V-shaped throat was used as input section. The coupling coefficients of a Gaussian beam were calculated for different illuminations by using simple expressions derived from the uniform asymptotic theory (UAT) of diffraction . Essential to this approach it was to simulate the beam as a wave radiated by a source located at a complex point.
Metallic waveguide systems for collecting, directing, and shaping 3 kw laser beams
A. Cutolo;I. Pinto;
1981-01-01
Abstract
A 30 cm long waveguide made of two specularly reflecting water-cooled brass plates was built for use with a 3 kw CO2 laser beam focused with telescopes having numerical apertures ranging between f/7 and f/150. In order to improve the collection efficiency a V-shaped throat was used as input section. The coupling coefficients of a Gaussian beam were calculated for different illuminations by using simple expressions derived from the uniform asymptotic theory (UAT) of diffraction . Essential to this approach it was to simulate the beam as a wave radiated by a source located at a complex point.File in questo prodotto:
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