A neodymium laser passively Q switched with a saturable absorber and a stimulated-Brillouin-scattering mirror is numerically studied. An explanation is given for the laser beam spot-size widening. It is shown that this phenomenon is, most probably, due to nonperfect phase conjugation that occurs during the stimulated-Brillouin-scattering process through switching by intracavity radiation. The results of numerical simulation of the laser that account for this phenomenon are compared with experiment. It is demonstrated that the calculated output energy and pulse duration are in good agreement with those measured experimentally.
© 2000 Optical Society of America
(140.3410) Lasers and laser optics : Laser resonators
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3540) Lasers and laser optics : Lasers, Q-switched
(190.5940) Nonlinear optics : Self-action effects
(290.5900) Scattering : Scattering, stimulated Brillouin
Alexander V. Kir’yanov, Vicente Aboites, and Nikolai N. Il’ichev, "Analysis of a large-mode neodymium laser passively Q switched with a saturable absorber and a stimulated-Brillouin-scattering mirror," J. Opt. Soc. Am. B 17, 11-17 (2000)