In LiNbO3 at light intensities above 106 W/m2 much stronger refractive index changes can be induced, as expected from measurements at low intensities. Most experimental data have been published on iron-doped LiNbO3 crystals. We propose a two-center charge-transport model for LiNbO3:Fe that describes most results at low and high intensities quantitatively. It explains the intensity dependence of steady-state refractive index changes and enhanced holographic sensitivities at high light intensities as well as the presence of light-induced absorption changes.
© 1993 Optical Society of America
Original Manuscript: November 30, 1992
Revised Manuscript: April 5, 1993
Published: November 1, 1993
F. Jermann and J. Otten, "Light-induced charge transport in LiNbO3:Fe at high light intensities," J. Opt. Soc. Am. B 10, 2085-2092 (1993)