Sr0.59Ba0.41Nb2O6 and Sr0.75Ba0.25 Nb2O6 exhibit an intensity-dependent absorption in the visible spectral range. We perform pump (green)–probe (red) measurements and find variation as high as 0.45 cm−1 in the absorption coefficient, which depends significantly on the polarization of the probe light beam. Our results indicate a nonexponential dark decay time of the induced absorption and suggest that the trapping potential of the shallow traps varies significantly from one trap to another (multiple isolated shallow traps).
© 1994 Optical Society of America
Original Manuscript: February 10, 1994
Published: September 1, 1994
Sergei Orlov, Mordechai Segev, Amnon Yariv, and Ratnakar R. Neurgaonkar, "Light-induced absorption in photorefractive strontium barium niobate," Opt. Lett. 19, 1293-1295 (1994)