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Proceedings Paper

Distortion and cross polarization of a simple Gaussian beam on diffraction from grating couplers for Q. O. gyrotrons
Author(s): H. Cao
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Paper Abstract

We examine the distortion and cross polarization of a Gaussian beam diffracted from a planar grating with curvilinear grooves or from an elliptical grating with curved grooves placed in the Littrow mount. The electromagnetic field diffracted from the gratings in the 0th order and propagating to an HE11 waveguide has been numerically computed. The output patterns, distortion, and cross polarizatign have been obtained for the gratings; the results agree well with the cold test results. The comparison between the gratings shows that the elliptical grating is more effective than the planar grating.

Paper Details

Date Published: 4 December 2017
PDF: 2 pages
Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 15767N (4 December 2017); doi: 10.1117/12.2297988
Show Author Affiliations
H. Cao, Ecole Polytechnique Fédérale de Lausanne (Switzerland)

Published in SPIE Proceedings Vol. 1576:
16th International Conference on Infrared and Millimeter Waves
Minh Quang Tran, Editor(s)

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