Fast and reconfigurable one-dimensional waveguides are produced by interband photorefraction. The index barriers are induced by ultraviolet light. The guiding of a red laser beam with a full width at half-maximum of 15 μm is demonstrated. Buildup and decay times of the waveguide in pure KNbO<sub>3</sub> are of the order of 100 μs and 10 ms, respectively. The intensity of the guided light has no influence on the guiding properties over the range from 4 mW/cm<sup>2</sup> to 200 W/cm<sup>2</sup> . By reconfiguration of the waveguide, deflection angles of as much as 1.75 deg inside the crystal are achieved.
© 1999 Optical Society of America
Ph. Dittrich, G. Montemezzani, P. Bernasconi, and P. Günter, "Fast, reconfigurable light-induced waveguides," Opt. Lett. 24, 1508-1510 (1999)