| Self-deflection of a bright soliton in a separate bright－dark spatial soliton pair based on a higher-order space charge field |
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| 引用本文： | 刘劲松,郝中华.Self-deflection of a bright soliton in a separate bright－dark spatial soliton pair based on a higher-order space charge field[J].中国物理 B,2003,12(10):1124-1134. |
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| 作者姓名： | 刘劲松 郝中华 |
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| 作者单位： | State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China;State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No 10174025) and the Key Project Foundation of the Education Ministry of China (Grant No 01118). |
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| 摘 要： | The self-deflection of a bright solitary beam can be controlled by a dark solitary beam via a parametric coupling effect between the bright and dark solitary beams in a separate bright－dark spatial soliton pair supported by an unbiased series photorefractive crystal circuit. The spatial shift of the bright solitary beam centre as a function of the input intensity of the dark solitary beam (\hatρ) is investigated by taking into account the higher-order space charge field in the dynamics of the bright solitary beam via both numerical and perturbation methods under steady-state conditions. The deflection amount (Δs_0), defined as the value of the spatial shift at the output surface of the crystal, is a monotonic and nonlinear function of \hatρ. When \hatρ is weak or strong enough, Δs_0 is, in fact, unchanged with \hatρ, whereas Δs_0 increases or decreases monotonically with \hatρ in a middle range of \hatρ. The corresponding variation range (δs) depends strongly on the value of the input intensity of the bright solitary beam (r). There are some peak and valley values in the curve of δs versus r under some conditions. When \hatρ increases, the bright solitary beam can scan toward both the direction same as and opposite to the crystal's c-axis. Whether the direction is the same as or opposite to the c-axis depends on the parameter values and configuration of the crystal circuit, as well as the value of r. Some potential applications are discussed.
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| 关 键 词： | 空间光孤子 光反射效应 光电效应 自偏差 暗孤子 孤子对 高次空间电荷 倍频效应 非线性光学 |
| 收稿时间： | 1/3/2003 12:00:00 AM |
Self-deflection of a bright soliton in a separate bright－dark spatial soliton pair based on a higher-order space charge field |
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| Liu Jin-Song and Hao Zhong-Hua.Self-deflection of a bright soliton in a separate bright－dark spatial soliton pair based on a higher-order space charge field[J].Chinese Physics B,2003,12(10):1124-1134. |
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| Authors: | Liu Jin-Song and Hao Zhong-Hua |
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| Affiliation: | State Key Laboratory of Laser Technology, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | The self-deflection of a bright solitary beam can be controlled by a dark solitary beam via a parametric coupling effect between the bright and dark solitary beams in a separate bright－dark spatial soliton pair supported by an unbiased series photorefractive crystal circuit. The spatial shift of the bright solitary beam centre as a function of the input intensity of the dark solitary beam (\hatρ) is investigated by taking into account the higher-order space charge field in the dynamics of the bright solitary beam via both numerical and perturbation methods under steady-state conditions. The deflection amount (Δs_0), defined as the value of the spatial shift at the output surface of the crystal, is a monotonic and nonlinear function of \hatρ. When \hatρ is weak or strong enough, Δs_0 is, in fact, unchanged with \hatρ, whereas Δs_0 increases or decreases monotonically with \hatρ in a middle range of \hatρ. The corresponding variation range (δs) depends strongly on the value of the input intensity of the bright solitary beam (r). There are some peak and valley values in the curve of δs versus r under some conditions. When \hatρ increases, the bright solitary beam can scan toward both the direction same as and opposite to the crystal's c-axis. Whether the direction is the same as or opposite to the c-axis depends on the parameter values and configuration of the crystal circuit, as well as the value of r. Some potential applications are discussed. |
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| Keywords: | spatial optical solitons photorefractive effects photovoltaic effects self-deflection |
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