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弯曲阶跃型光纤中光学涡旋的传输特性研究

Study on Propagation Characteristics of Optical Vortices in Bent Fibers

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摘要

研究了光学涡旋在光纤中传播特性。从Maxwell方程出发,推导光波导中的波动方程,并进行阶跃光纤传输的本征模式求解,根据光学涡旋模式(OAM模)和线偏振模式(LP模)与矢量模式之间的关系,解出光学涡旋以及线偏振模在光纤中的模式分布,理论分析了光学涡旋在光纤中较LP模的传播优势,并通过计算模拟其在弯折光纤中的传播过程,发现其光场强度空间分布具有周期性旋转特性。研究光纤弯曲半径以及涡旋拓扑荷对光学涡旋传播的影响。光纤弯曲半径越小,传输损耗越大;涡旋拓扑荷越大,传输损耗越大,对应的旋转周期越小。

Abstract

The propagation characteristics of optical vortices in fibers are studied. The wave equations in the optical waveguide based on the Maxwell′s equation are derived, and then the eigen modes of the step index fiber are solved. According to the relationship of the orbital angular momentum (OAM) and linear polarization (LP) modes with the vector modes, the distributions of optical vortices and linear polarization modes in fibers are solved and the advantage of optical vortices in fibers over the LP modes in theory are analyzed. The propagation of the optical vortices in bend fibers is simulated. It is found that the distribution of the optical field has periodic rotating properties. The effects of the fiber′s bending radius and the topological charge on the propagation of optical vortices are researched. The smaller the bending radius is, the greater loss in propagation is produced. The larger the topological charge is, the greater loss in propagation and the shorter rotating period is.

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中图分类号:O436

DOI:10.3788/aos201535.s106001

所属栏目:光纤光学与光通信

基金项目:中国工程物理研究院科学技术发展基金(2014A0401018)

收稿日期:2015-03-25

修改稿日期:2015-04-28

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作者单位    点击查看

孙喜博:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
耿远超:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
刘兰琴:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
朱启华:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
黄志华:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
黄晚晴:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
张颖:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900
王文义:中国工程物理研究院激光聚变研究中心, 四川 绵阳 621900

联系人作者:孙喜博(sxb_09@163.com)

备注:孙喜博(1991-),女,硕士研究生,主要从事光学涡旋和高功率激光技术等方面的研究。

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引用该论文

Sun Xibo,Geng Yuanchao,Liu Lanqin,Zhu Qihua,Huang Zhihua,Huang Wanqing,Zhang Ying,Wang Wenyi. Study on Propagation Characteristics of Optical Vortices in Bent Fibers[J]. Acta Optica Sinica, 2015, 35(s1): s106001

孙喜博,耿远超,刘兰琴,朱启华,黄志华,黄晚晴,张颖,王文义. 弯曲阶跃型光纤中光学涡旋的传输特性研究[J]. 光学学报, 2015, 35(s1): s106001

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