Chinese Optics Letters, 2019, 17 (12): 120601, Published Online: Oct. 8, 2019  

Propagation characteristics of orbital angular momentum modes at 810 nm in step-index few-mode fibers Download: 600次

Author Affiliations
1 School of Physics and Key Laboratory of Weak-Light Nonlinear Photonics, Nankai University, Tianjin 300071, China
2 National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
Abstract
In free-space or in optical fibers, orbital angular momentum (OAM) multiplexing for information transmission has been greatly developed. The light sources used were well coherent communication bands, and the fibers used were customized. Here, we use an 810 nm femtosecond laser to generate optical vortices carrying OAM and then feed them into two kinds of commercial step-index few-mode fibers to explore the transmission characteristics of OAM modes. We also propose a method without multiple-input multiple-output digital signal processing to identify the input OAMs. It is of great guiding significance for high-dimensional quantum information experiments via the OAMs as a degree of freedom, using the light generated by the spontaneous parametric down-conversion as the source and the commercial fibers for information transmission.

Zhouxiang Wang, Yuchen Xie, Shuangyin Huang, Han Zhou, Rui Liu, Zhifeng Liu, Min Wang, Wenrong Qi, Qianqian Tian, Lingjun Kong, Chenghou Tu, Yongnan Li, Huitian Wang. Propagation characteristics of orbital angular momentum modes at 810 nm in step-index few-mode fibers[J]. Chinese Optics Letters, 2019, 17(12): 120601.

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