We report the experimental observation of steady-state photorefractive Y junctions and sequences of high-order dark photorefractive screening solitons in a biased bulk strontium barium niobate crystal. The parameters that characterize the properties of the high-order dark screening solitons are measured and compared with the theoretical prediction for the fundamental dark screening soliton. The high-order dark solitons induce stable waveguides in one transverse dimension that can guide other, possibly very intense, beams of different wavelengths.
© 1996 Optical Society of America
Zhigang Chen, Matthew Mitchell, and Mordechai Segev, "Steady-state photorefractive soliton-induced Y-junction waveguides and high-order dark spatial solitons," Opt. Lett. 21, 716-718 (1996)