Abstract
Recent experiments1,2 indicate that, in addition to the well-known spectral inhomogeneity of Nd: glass gain media, a polarization inhomogeneity occurs as a result of anisotropy of the ion's stimulated emission cross section. This phenomenon is manifested by a polarization-dependent small-signal gain in an amplifier after passage of a large linearly polarized pulse; i.e., the saturating pulse burns a polarization-dependent hole analogous to a spectral hole that is burned into the medium’s frequency- dependent gain profile. To predict large-signal gain saturation and extraction efficiency, all sources of inhomogeneity must be considered.
© 1983 Optical Society of America
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