Self-Deflection of Steady-State Spatial Solitons in Biased Photorefractive-Photovoltaic Crystals
Lu Keqing1, Zhang Yanpeng1, Zhang Junchang1, Tang Tiantong1, Hou Xun1, Wu Zhensen2
(Xi'an Jiaotong University,Xi'an 710049,China1;2.Xidian University)

Abstract: Modified space-charge field is pres ented for biased photorefractive-photovoltaic crystals. When the external electric field is absent, there prevails the space-charge field of photovoltaic solitons in closed and open circuit. The self-deflection of steady-state bright spatial solitons arising from diffusion effects isinvestigated using perturbation analysis for the low-amplitude regime in biased photorefractive-photovoltaic
crystals. Predicted are the center of the optical beam moving on a parabolic trajectory and the central spatial frequency component shifting linearly with the propagation distance. The soliton wavelength division multiplexing device may be made by using the self-deflection of the spatial solitons in biased photorefractive-photovoltaic crystals.
Keywords: optical soliton;photorefractive crystal;photovoltaic effect