In-waveguide TE01-to-whispering gallery mode conversion using periodic wall perturbations

Manfred Thumm; Annemarie Jacobs

doi:10.1117/12.978766

18 November 1989 In-Waveguide TE01-To-Whispering Gallery Mode Conversion Using Periodic Wall Perturbations

Manfred Thumm, Annemarie Jacobs

Proceedings Volume 1039, 13th Intl Conf on Infrared and Millimeter Waves; (1989) https://doi.org/10.1117/12.978766
Event: 13th International Conference on Infrared and Millimeter Waves, 1987, Honolulu, HI, United States

Abstract

This paper reports numerical optimization calculations on mode converters to generate pure, rotating TE 1,2,3 (at 120 GHz) and TE 15,2 (at 140 GHz) whispering gallery modes (WGM) in oversized circular waveguides, for conversion efficiency optimization studies on high-power quasi-optical WGM gyrotron output mode transducers. Two-stage TE01-to-TEonto- TEm2 conversion sequences (n = 6 at 120 GHz, n = 7 at 140 GHz) using periodic radius and m-fold helical (corkscrew type) wall deformations, respectively, provide output mode purities of almost 99%.

Citation Download Citation

Manfred Thumm and Annemarie Jacobs "In-Waveguide TE01-To-Whispering Gallery Mode Conversion Using Periodic Wall Perturbations", Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); https://doi.org/10.1117/12.978766

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