Abstract
Use of a crystal as a saturable absorber Q-switch for 1.07 and diode pumped lasers shows a considerable dependence of output characteristics on the orientation of the intracavity field polarization vector regarding crystallographic axes. Anisotropy of nonlinear absorption of ions in a single crystal at wavelengths of 1.08 and has been experimentally studied. The experimental data are analyzed within the framework of a phenomenological model when the ions are described as three sets of linear dipoles oriented along the crystallographic axes. Ground-state and excited-state absorption cross sections at 1.08 and are evaluated to be , and , , respectively. Saturation fluence and intensity at 1.08 and are estimated as and , respectively.
© 2007 Optical Society of America
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