| 非相干空间孤子的自陷行为 |
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| 引用本文： | 陈园园,王奇,周炯昴,施解龙. 非相干空间孤子的自陷行为[J]. 光子学报, 2003, 32(6): 693-697 |
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| 作者姓名： | 陈园园 王奇 周炯昴 施解龙 |
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| 作者单位： | 上海大学理学院物理系,上海宝山区,200436 |
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| 基金项目： | 国家自然科学基金 (编号 :6 0 1770 2 0 )，上海市教委重点学科资助项目 |
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| 摘 要： | 用相干密度法研究了一维非相干光束在饱和对数型光折变介质中的自陷行为,发现在传输过程中孤子的形态可具有稳态和周期性振荡的特点,具体取决于入射光束的初始宽度、相干特性和材料的非线性响应;研究了构成非相干光束的相干组份的传播行为,发现各相干组份的强度和光束宽度沿纵向发生周期性变化,峰值位置沿横向发生周期性变化.另外,利用横向相干宽度研究了非相干光束在各种传输状态下相干特性的变化,从而进一步解释了非相干光束在不同传播状态下的演化特性.
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| 关 键 词： | 非相干光束 空间孤子 横向相干宽度 |
| 收稿时间： | 2002-08-12 |
| 修稿时间： | 2002-08-12 |
Self-trapping Behavior of Incoherent Spatial Soliton |
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| Chen Yuanyuan,Wang Qi,Zhou Jiongmao,Shi Jielong School of Sciences,Shanghai University,Shanghai China. Self-trapping Behavior of Incoherent Spatial Soliton[J]. Acta Photonica Sinica, 2003, 32(6): 693-697 |
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| Authors: | Chen Yuanyuan Wang Qi Zhou Jiongmao Shi Jielong School of Sciences Shanghai University Shanghai China |
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| Affiliation: | Chen Yuanyuan,Wang Qi,Zhou Jiongmao,Shi Jielong School of Sciences,Shanghai University,Shanghai 200436 China |
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| Abstract: | The self trapping of one dimensional incoherent optical beam in logarithmically saturable photorefractive media is studied by using the coherent density approach.It is shown that the soliton can propagate stationarily or periodically, which is decided by the initial beam conditions and the nonlinearity of the media. The propagation characteristics of coherent components that consist of incoherent beam are discussed in detail. By analyzing quantitatively the transverse coherence length,it is found that the transverse coherence property of the incoherent beam evolves diversely under different propagation conditions. |
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| Keywords: | Incoherent beam Spatial soliton Transverse coherence length |
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