Self-focusing of a single laser pulse in a photorefractive medium
An original experimental and theoretical time-resolved study of a single laser pulse self-focusing in a nonlinear photorefractive medium is reported. The behavior of the self-focusing process is experimentally observed in a photorefractive Bi12TiO20 crystal during the 5 ns pulse duration of a doubled Nd:YAG (yttrium aluminum garnet) laser. A theoretical interpretation is provided, based on a simple model of photorefraction on the nanosecond time scale.
Wolfersberger
D
Laboratoire Materiaux Optiques, Photonique et Systemes, Universite de Metz et Supelec, 2 rue Edouard Belin, 57070 Metz Cedex, France.
Fressengeas
N
Maufoy
J
Kugel
G