Superluminal Propagation at Negative Group Velocity in Optical Fibers Based on Brillouin Lasing Oscillation
Superluminal Propagation at Negative Group Velocity in Optical Fibers Based on Brillouin Lasing Oscillation
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基于布里渊激光振荡的光纤负群速度超光速传播
DOI：
10.1103/physrevlett.107.093903
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发表时间：
2011-08-24
影响因子：
8.6
通讯作者：
Luo, Shouyu
中科院分区：
文献类型：
--
作者：
Zhang, Liang;Zhan, Li;Luo, Shouyu
报道了环形腔中布里渊激光振荡在光纤中的超光速传输。实验证明了负群速度在10米单模光纤中的传输。在输入信号之前观察到221.2 ns的前移，实现了211：3 ns/db的很高的斜率效率。这表明该方法适用于光纤远距离低损耗超光速传输。相应地，群速度为-0：151C，群指数为-6：636--光纤的最高群速度。
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 -0:151c and the group index is -6:636-the highest group velocity ever reported for optical fibers.