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

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

doi:10.3788/COL201917.120601

Journals >Chinese Optics Letters >Volume 17 >Issue 12 >Page 120601 > Article

Chinese Optics Letters
Vol. 17, Issue 12, 120601 (2019)

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

Zhouxiang Wang¹, Yuchen Xie¹, Shuangyin Huang¹, Han Zhou¹, Rui Liu¹, Zhifeng Liu¹, Min Wang¹, Wenrong Qi¹, Qianqian Tian¹, Lingjun Kong², Chenghou Tu¹, Yongnan Li¹, and Huitian Wang^2、*

Author Affiliations

¹School of Physics and Key Laboratory of Weak-Light Nonlinear Photonics, Nankai University, Tianjin 300071, China

²National Laboratory of Solid State Microstructures, School of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China

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DOI: 10.3788/COL201917.120601 Cite this Article Set citation alerts

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 Copy Citation Text

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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.