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Proceedings Paper

Properties of unstable resonators with a nonreflecting central zone
Author(s): Michel Piche; Daniel Cantin
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Paper Abstract

The properties of unstable resonators in which localized amplitude or phase perturbations are induced at the center of the coupling mirror are investigated. Unstable resonators with a non-reflecting central zone have zero geometrical feedback; however, there exists a residual feedback due to diffraction at the mirror edges. Such a residual feedback can be significantly reduced using variable reflectivity mirrors. Negative branch unstable resonators with an opaque focal zone are even more efficient to quench this residual feedback. Enhancement of the feedback coefficient by factors up to 3 is predicted when the phase of the wave reflected at the coupling mirror changes over a restricted zone near its center.

Paper Details

Date Published: 1 June 1990
PDF: 10 pages
Proc. SPIE 1224, Optical Resonators, (1 June 1990); doi: 10.1117/12.18429
Show Author Affiliations
Michel Piche, Univ. Laval (Canada)
Daniel Cantin, Univ. Laval (Canada)

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

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