Distortion and cross polarization of a simple Gaussian beam on diffraction from grating couplers for Q. O. gyrotrons
The distortion and cross polarisation 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 was examined. The electromagnetic field diffracted from the gratings in the 0th order and propagating to an HE(11) waveguide was computed numerically. The output patterns, distortion, and cross polarisation were 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.
Bibliographic Reference: Paper presented: 16th International Conference on Infrared and Millimeter Waves, Lausanne (CH), Aug. 26-30, 1991
Availability: Available from (1) as Paper EN 36304 ORA
Record Number: 199111116 / Last updated on: 1994-12-02
Original language: en
Available languages: en