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Proceedings Paper

Mode properties and characteristics of negative branch unstable ring resonators
Author(s): Philip R. Cunningham; Sallie S. Townsend
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Paper Abstract

The unfolded single-aperture near-imaging negative branch confocal unstable ring-resonator design is considered. Diffractive properties and mode characteristics of the moderate Fresnel-number baseline-resonator design with Neq = - 10.28 are calculated using three-dimensional FFT, FHT, and virtual source codes. The FFT results are in agreement with those from positive branch unstable resonators having the same Fresnel number. Similar modeling for resonator designs where Neq is varied from - 6.6 to - 12.0 is analyzed, and good mode discrimination is found between the dominant 1 = 0 modes and higher order modes at half integral Fresnel numbers. Both FFT and FHT diffractive codes exhibit increasing loss of accuracy when applied to resonator designs as equivalent Fresnel numbers increase above Neq = 12 - 15. The virtual-code results agree well with the FFT and FHT modeling results for Neq = - 10 to - 25.

Paper Details

Date Published: 1 June 1990
PDF: 16 pages
Proc. SPIE 1224, Optical Resonators, (1 June 1990); doi: 10.1117/12.18433
Show Author Affiliations
Philip R. Cunningham, United Technologies Research Ctr. (United States)
Sallie S. Townsend, United Technologies Research Ctr. (United States)

Published in SPIE Proceedings Vol. 1224:
Optical Resonators
Dale A. Holmes, Editor(s)

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