光学学报, 2019, 39 (1): 0126018, 网络出版: 2019-05-10
多模光纤散斑场的纵向偏振调控 下载: 1043次
Polarization Modulation Along Longitudinal Direction of Speckle Field Formed by Laser Beam Through Multimode Fiber
物理光学 多模光纤 散斑 偏振态 光场调控 physical optics multimode optical fiber speckle polarization state optical field modulation
摘要
相干光经过多模光纤传输,在出射端形成一个随机的散斑场。对于非保偏多模光纤,还将出现退偏现象,使得入射的线偏振光不再保持线偏振分布。因此,非保偏多模光纤散斑场的随机性不仅表现在光强方面,也表现在偏振方面。基于反馈波前整形技术,实现了对多模光纤出射端无序散斑场的光强和偏振的调控,获得了光强集中的聚焦线,并且可以有效控制聚焦线的偏振分布。
Abstract
A random speckle field is generated in the propagation of coherent light through a multimode fiber (MMF). For a non-polarization-maintaining MMF, linearly polarized incident light cannot maintain the linear polarization distribution owing to the depolarization effect. Therefore the randomness of the speckle pattern is observed in both intensity and polarization distributions. In this study, the intensity and polarization of the disordered speckle field generated by the MMF is controlled with the feedback wavefront shaping technology that generates a focal line with controllable polarization distribution.
扎西巴毛, 范伟如, 胡显声, 陈子阳, 蒲继雄. 多模光纤散斑场的纵向偏振调控[J]. 光学学报, 2019, 39(1): 0126018. Bamao Zhaxi, Weiru Fan, Xiansheng Hu, Ziyang Chen, Jixiong Pu. Polarization Modulation Along Longitudinal Direction of Speckle Field Formed by Laser Beam Through Multimode Fiber[J]. Acta Optica Sinica, 2019, 39(1): 0126018.