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The characteristics analysis of a new-style four-mirror axisymmetric-fold-combination cavity adapting to cylindrical discharge region
Authors:Wei Pan  Yude Li  Liang Chen  Kai Jia
Affiliation:College of Electronics and Information Engineering, Sichuan University, 610065 Chengdu, China
Abstract:
An axisymmetric-fold-combination (ASFC) cavity composed of two planar mirrors and spherical mirrors was designed. It is a stable-unstable resonator cavity. The light field of radial direction is Gaussian distribution. And in angular orientation, the distribution keeps invariant. It could generate annular CO2 laser beam with excellent spatial coherence. And the spatial coherence is commendably realized with its stable-unstable cavity structure. The output light intensity distribution of this special model was discussed and simulated. With exterior lenses group, the output beams can be adjusted and controlled better to meet the manufactural requirements. Some references were provided for further research of the cavity with cylindrical discharge region.
Keywords:Hollow-annular laser beam   Axisymmetric-fold-combination cavity   Cylindrical discharge region   Spatial coherence   The output light intensity
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