We measured the intensity pattern of an Ar-laser beam after its passage through GdAlO_3:
Cr^+ 3 and Al_2O_3: Cr^+ 3 (ruby) crystals. We observed distortions and the formation of …

Degenerate four-wave-mixing measurements have been performed on a wide variety of Nd
3+-doped oxide and fluoride glasses and crystals. Crossed beams from a cw argon-ion laser …

It is shown experimentally that a weak optical signal in a Nd: YAG amplifier can have an
extraordinarily large gain that is due to transient coherent nonlinear interaction with a strong …

The mechanism for refractive-index changes that accompany changes in population during
pumping and amplification of an optical beam is studied in a Nd: YAG laser crystal by both …

An experiment has been performed for measuring a nonlinear refractive index that is due to
the polarizability difference ΔαP between excited (4T2) and ground (4A2) states in a Cr3+ …

We have measured the degenerate four-wave-mixing signals from several Cr 3+-doped
oxide and fluoride laser crystals. The signals are predominantly generated by scattering of …

An experiment has been performed to find evidence and analyze a nonlinear diverging
lensing effect occurring in a flash-lamp-pumped Cr^ 3+: LiSAF laser. The effect is assigned …

The ratio of the imaginary part to the real part of the complex nonlinear refractive index has
been measured by transient two-wave mixing in acridine-orange-doped fluorophosphate …

A polarising interferometer was used to investigate changes in the refractive index of an Nd:
YAG laser crystal associated with changes in the populations of the electronic energy levels …

In Cr^+ 3-doped crystals the saturation of the excited-state population implies the saturation
of the complex nonlinear index of refraction n_2, so n_2 α (1+ I/I_s)^− 1. We developed a …