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Proceedings Paper

New type of unstable resonator
Author(s): Avi Fogelman; Pade Offer; Yehuda Nachshon
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Paper Abstract

A resonator based on a positive branch confocal unstable resonator with toroidal curvature mirrors is presented. The mirrors have different radii of curvature in perpendicular directions. In one direction, the curvature (main curvature) is strong, and it governs the main properties of the resonator. In the perpendicular direction, there is a weaker (secondary) curvature acting to decrease resonator's sensitivity to mirror tilts. Resonators of different size, gain, and output coupling are examined, and attention is given to phase distributions, near-field intensity, beam quality, and intensity distribution. Focus is placed on basic eigenmodes for uniform and nonuniform gains, mirror tilt, and phase perturbations. High far-field intensity and increased power-extraction efficiency in nonuniform active media in such a resonator are emphasized.

Paper Details

Date Published: 1 June 1990
PDF: 13 pages
Proc. SPIE 1224, Optical Resonators, (1 June 1990); doi: 10.1117/12.18450
Show Author Affiliations
Avi Fogelman, Rafael (Israel)
Pade Offer, Rafael (Israel)
Yehuda Nachshon, Rafael (Israel)


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

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