Journal
OPTICS AND LASER TECHNOLOGY
Volume 43, Issue 7, Pages 1274-1278Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2011.03.022
Keywords
Spatial soliton; Photorefractive effect; Photorefractive material
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Funding
- program of Excellent Team in Harbin institute of Technology
- Natural Science Foundation of China [60508005]
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We investigate theoretically the time behavior of spatial solitons in biased centrosymmetric photorefractive crystals. A one-dimensional time-dependent wave propagation equation in biased centrosymmetric photorefractive crystals is presented. It is shown that the bright solitons exist in both quasi-steady-state and steady-state regimes for high saturation values. When the intensity ratio is smaller than unity, the bright soliton width decreases monotonically to a minimum value toward steady state. Moreover, the time-dependent nonlinear wave equation exhibits only steady-state screening dark spatial solitons. (C) 2011 Elsevier Ltd. All rights reserved.
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