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Proceedings Paper

In-waveguide TE01-to-whispering gallery mode conversion using periodic wall perturbations
Author(s): Manfred Thumm; Annemarie Jacobs
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Paper 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%.

Paper Details

Date Published: 18 November 1989
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Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); doi: 10.1117/12.978766
Show Author Affiliations
Manfred Thumm, Univ. Stuttgart (Germany)
Annemarie Jacobs, Univ. Stuttgart (Germany)


Published in SPIE Proceedings Vol. 1039:
13th Intl Conf on Infrared and Millimeter Waves
Richard J. Temkin, Editor(s)

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