Superluminal propagation at negative group velocity in optical fibers based on Brillouin lasing oscillation.

@article{Zhang2011SuperluminalPA,
  title={Superluminal propagation at negative group velocity in optical fibers based on Brillouin lasing oscillation.},
  author={Liang Zhang and Li Zhan and Kai Qian and Jinmei Liu and Qishun Shen and Xiao Hu and Shouyu Luo},
  journal={Physical review letters},
  year={2011},
  volume={107 9},
  pages={093903}
}
We report superluminal propagation in optical fibers using Brillouin lasing oscillation in a ring cavity. Negative group velocity propagation through a 10-m single mode fiber has been experimentally demonstrated. An advancement of 221.2 ns was observed before the input signal, which was achieved with a very high slope efficiency of 211.3  ns/dB. This indicates that this way is suitable for long-distance low-loss superluminal propagation via optical fibers. Correspondingly, the group velocity is… CONTINUE READING
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