Ultrahigh enhancement in absolute and relative rotation sensing using fast and slow light
Ultrahigh enhancement in absolute and relative rotation sensing using fast and slow light
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DOI：
10.1103/physreva.75.053807
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发表时间：
2007-05-01
影响因子：
2.9
通讯作者：
Salit, K.
中科院分区：
文献类型：
--
作者：
Shahriar, M. S.;Pati, G. S.;Salit, K.
我们描述了一种基于谐振腔的光学陀螺仪，其测量绝对旋转的灵敏度通过使用超光速光传播的异常色散特性来增强。增强由群指数的倒数给出，饱和到由群速度色散确定的界限。我们还展示了如何抵消效应的伴随加宽的谐振器线宽可以规避使用一个有源腔。对于实际条件，增强因子高达10（6）。我们还展示了如何正常色散用于慢光可以提高相对旋转传感在一个专门设计的Sagnac干涉仪，与提高所给出的减慢因子。
We describe a resonator-based optical gyroscope whose sensitivity for measuring absolute rotation is enhanced via use of the anomalous dispersion characteristic of superluminal light propagation. The enhancement is given by the inverse of the group index, saturating to a bound determined by the group velocity dispersion. We also show how the offsetting effect of the concomitant broadening of the resonator linewidth may be circumvented by using an active cavity. For realistic conditions, the enhancement factor is as high as 10(6). We also show how normal dispersion used for slow light can enhance relative rotation sensing in a specially designed Sagnac interferometer, with the enhancement given by the slowing factor.