Group velocity manipulation in active fibers using mutually modulated cross-gain modulation: from ultraslow to superluminal propagation.

@article{Qian2011GroupVM,
  title={Group velocity manipulation in active fibers using mutually modulated cross-gain modulation: from ultraslow to superluminal propagation.},
  author={Kai Qian and Li Zhan and Liang Zhang and Ziqiang Zhu and James S. Peng and Zheng Cheng Gu and Xinhua Hu and Shenq Yih Luo and Yi Xin Xia},
  journal={Optics letters},
  year={2011},
  volume={36 12},
  pages={2185-7}
}
We propose and experimentally demonstrate the propagation of slow/fast light in an erbium-doped fiber (EDF) using mutually modulated cross-gain modulation. The group velocity of the light signal can be manipulated by the effect of gain cross-saturation modulation by a saturating light at an arbitrary wavelength in the gain bandwidth of the EDF. The ultraslow propagation with a small group velocity of 5.6 × 10⁻³c (c is the light speed in free space) and superluminal propagation with a negative… CONTINUE READING

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