Temporal Behavior of Low-Amplitude Grey Spatial Solitons in Biased Two-Photon Photorefractive Crystals

摘要

The temporal property of grey screening spatial solitons due to two-photon photorefractive effect in low amplitude regime is analyzed. The results indicate that a broad solitons is generated at the beginning, and as time evolves, the intensity width of grey solitons decreases monotonically to a minimum value toward steady state. In the same propagation time, the FWHM of solitons decreases with rho increasing or m decreasing. Moreover, the formation time of solitons is independent of rho and m. The time is close to a constant determined by the dielectric relaxation time.