Experimental study of a quasi-optical mode converter for whispering gallery mode gyrotrons

A. Li

doi:10.1117/12.2301457

1 December 1990 Experimental study of a quasi-optical mode converter for whispering gallery mode gyrotrons

A. Li

Proceedings Volume 1514, 15th International Conference on Infrared and Millimeter Waves; 15141B (1990) https://doi.org/10.1117/12.2301457
Event: 15th International Conference on Infrared and Millimeter Waves, 1990, Orlando, FL, United States

Abstract

A mode converter for whispering gallery mode gyrotrons has been designed and tested. Experiments were performed on a megawatt power level, 3μs pulsed gyrotron operating in the TE_16,2,1 whispering gallery mode at 148 GHz. The converter consists of a helically cut waveguide launcher and a doubly curved reflector designed to focus the radiation into a Gaussian beam. The launcher and reflector were designed using geometric optics. The experiments show that the converter focuses 80±7% of the incident radiation in the TE_16,2,1 mode in a focal spot.

Citation Download Citation

A. Li "Experimental study of a quasi-optical mode converter for whispering gallery mode gyrotrons", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 15141B (1 December 1990); https://doi.org/10.1117/12.2301457

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