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Proceedings Paper

Unstable ring resonator with bidirectional propagation through the gain medium: analysis
Author(s): Alan H. Paxton
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Paper Abstract

Unique properties of unstable ring resonators are sometimes useful. A collimated beam in the gain medium may be desirable. Spatial hole burning is eliminated. Beam rotation may be helpful. There is a drawback, however. As usually constructed, a ring resonator has half as many passes through the gain medium as can be achieved with a standing-wave resonator. We have performed a geometrical and a wave-optics numerical simulation of a type of ring resonator that allows counter-propagating collinear passes through the gain medium, while there is also a section with a unidirectional beam. The resonator includes a polarizing beam splitter. The linear polarization is transformed to the orthogonal state by optical elements at the two ends of the region with counter-propagating beams. The wave-optics simulation treats a UR90, for which the output beam is unobscured.

Paper Details

Date Published: 18 February 2011
PDF: 6 pages
Proc. SPIE 7913, Laser Resonators and Beam Control XIII, 791302 (18 February 2011); doi: 10.1117/12.879854
Show Author Affiliations
Alan H. Paxton, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 7913:
Laser Resonators and Beam Control XIII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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