Properties of Diffraction Gratings Used as Output Couplers in a Quasi-Optical Gyrotron

The design of a diffration grating used as an output coupler for a Fabry-Perot resonator is presented. We then consider the problem of determining the distortion and the cross-polarization of the incident Gaussian beam. Different types of gratings and planes with straight or curvilinear grooves and elliptical, have been designed and built. The output pattern from a resonator using such a grating has been measured experimentally. We found that the elliptical grating generates the least distortion and cross-polarization. This result is attributed to the geometry of the grooves and is in excellent agreement with numerical calculations.


Published in:
Journal of Applied Physics, 73, 5, 2089-2102
Year:
1993
ISSN:
0021-8979
Laboratories:
SPC
CRPP




 Record created 2008-04-16, last modified 2018-01-28


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