Fixed index gratings in LiNbO(3):Fe upon long-term exposure to an intense laser beam.
Permanently fixed noisily recorded refractive index gratings are discovered in single crystals of LiNbO(3):Fe upon long-term exposure to a single laser beam with high intensities of I=100 kW/m(2) and ambient temperature. The fixing process is explained by considering the effect of laser-induced heating of the sample and the well-known simultaneous thermal fixing procedure.
Dieckmann
Volker
V
Department of Physics, University of Osnabrück, Barbarastrasse 7, 49069 Osnabrück, Germany. vdieckma@uos.de
Selinger
Andreas
A
Imlau
Mirco
M
Goulkov
Mikhail
M