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Proceedings Paper

Graded reflectivity mirror unstable laser resonator design
Author(s): Michel Morin; Michel Poirier
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Paper Abstract

The graded reflectivity mirror (GRM) unstable resonator has become the resonator of choice for many laser systems. It provides a large size fundamental mode while reducing detrimental diffraction effects encountered in hard-edge unstable resonators. It also allows some control over the near-field profile of the output beam through a proper choice of the reflectivity profile of the GRM. This added flexibility in design translates into an apparent increase in complexity to the potential user. This tutorial review discusses through a step-by-step approach the inner workings of such resonators, in order to identify tradeoffs which are involved in their design. Geometrical and diffractive contributions to the mode definitions are discussed, as well as the beam shaping action of amplification. Particular attention is given to super-Gaussian resonators, which are nowadays the most widely used.

Paper Details

Date Published: 13 May 1998
PDF: 14 pages
Proc. SPIE 3267, Laser Resonators, (13 May 1998); doi: 10.1117/12.308125
Show Author Affiliations
Michel Morin, National Optics Institute (Canada)
Michel Poirier, National Optics Institute (Canada)

Published in SPIE Proceedings Vol. 3267:
Laser Resonators
Alexis V. Kudryashov; Pierre Galarneau, Editor(s)

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