Accurate and practical method for characterizing Laguerre-Gaussian modes

作者：Xu Zhenlin; Zhu Tao; Cheng Di; Long Junling; Huang Ziwei; Liu Ruifeng; Zhang Pei^*; Gao Hong; Li Fuli

来源：Applied Optics, 2014, 53(8): 1644-1647.

DOI：10.1364/AO.53.001644

We propose a new parameter, Q(p,l)(2), based on cross-sectional intensity distribution to distinguish Laguerre-Gaussian (LG) beams. Theoretically, Q(p,l)(2) shows an approximately linear dependence on the topological index in higher LG modes. Compared with the similar parameter Q(p,l) proposed by Long et al. [Opt. Lett. 38, 3047 (2013)] recently, our experimental result demonstrates that the approximate linearity of Q(p,l)(2) brings out the advantage in characterizing higher topological indices. In addition, as more intensity data is used in calculating Q(p,l)(2), the experimental error is diminished naturally. Thus, Q(p,l)(2) can be used to easily and accurately characterize LG modes.

• 出版日期2014-3-10
• 单位西安交通大学