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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