A temperature study of a photorefractive coherent oscillation in a ring-loop resonator with the relaxor ferroelectric Sr_0.61 Ba_0.39 Nb_2 O_6:Ce as a nonlinear element is presented. It is shown that the oscillation intensity as well as the oscillation onset time strongly depend on the crystal temperature. Strong influence of a resonator loop angle on the temperature dependence of coherent oscillation is reported and discussed via the dispersion of thermal spatial disorder and thermal decay versus various scales in the polar structure. Optimization of the output of a photorefractive oscillator via thermal tuning of material parameters of the crystal is shown.
© 2005 Optical Society of America
M. Goulkov, O. Fedorenko, L. Ivleva, Th. Woike, T. Granzow, M. Imlau, and M. Wöhlecke, "Temperature-dependent coherent oscillation in photorefractive relaxor strontium barium niobate," J. Opt. Soc. Am. B 22, 1648-1653 (2005)