Second threshold condition in the case of Q switching by self-focusing
- 1 December 1986
- journal article
- Published by Optica Publishing Group in Journal of the Optical Society of America B
- Vol. 3 (12) , 1630-1636
- https://doi.org/10.1364/josab.3.001630
Abstract
In a recent paper [Opt. Lett. 10, 402 (1985)] we presented a novel passive technique for obtaining giant laser-pulse emission. In this paper we present a more sophisticated model based on Kirchhoff-Fresnel diffraction theory that confirms the aberrationless Gaussian model used before. Also, a simple criterion for short-pulse generation in the Q switch by the self-focusing technique is derived. A set of equations is obtained that permits the evaluation of the critical parameters that govern the laser dynamics. The second threshold condition is derived, and some typical examples are pointed out.Keywords
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