Zou Kang, Miao Lijun, Wang Guofa, Bi Ran, Chen Kan, She Xuan, Shu Xiaowu
Appl Opt. 2020 Dec 20;59(36):11301-11309. doi: 10.1364/AO.410293.
The dispersion degree of polarization, a new definition of the depolarization degree of partially polarized beams, is first proposed, to the best of our knowledge, to measure the performance of fiber depolarizers. First, the description of the polarization based on the Poincaré sphere is introduced. Then, the modified Delaunay triangulation algorithm is introduced, and the calculation formula of the dispersion degree of polarization is given based on this algorithm. The experimental device was set up, and the dispersion degree of polarization of the depolarized light after the fiber depolarizer was measured to be 47.3%. The components and proportions of polarization in the depolarized light were also obtained. Compared with the degree of polarization, the dispersion degree of polarization can quantitatively analyze the light polarization evaluation in the time dimension and provide a numerical reference for improving the depolarizer, thus increasing the fiber sensor's accuracy.
据我们所知，首次提出了偏振色散度这一部分偏振光束去偏振度的新定义，用于衡量光纤去偏振器的性能。首先，介绍了基于庞加莱球的偏振描述。然后，引入了改进的德劳内三角剖分算法，并基于该算法给出了偏振色散度的计算公式。搭建了实验装置，测得光纤去偏振器后去偏振光的偏振色散度为47.3%。还得到了去偏振光中偏振的成分和比例。与偏振度相比，偏振色散度能够在时间维度上对光偏振评估进行定量分析，为改进去偏振器提供数值参考，从而提高光纤传感器的精度。
