@misc{hailong2013novel,
  title={A novel space division multiplexing system for free space optical communications},
  author={Zhou Hai-long and Dong Jian-ji and Shi Lei and Huang De-xiu and Zhang Xin-Liang},
  year={2013},
  eprint={1308.6405},
  archivePrefix={arXiv},
  primaryClass={physics.optics},
  url={https://arxiv.org/abs/1308.6405}
}