Ultrahigh Precision Absolute and Relative Rotation Sensing using Fast and Slow Light

Details Ultrahigh Precision Absolute and Relative Rotation Sensing using Fast and Slow Light Ultrahigh Precision Absolute and Relative Rotation Sensing using Fast and Slow Light

2005-05-25

arxiv.org/abs/quant-ph/0505192v5

Physics

Quantum Physics

6 pages including figures. Accepted for publication in Physical Review A

Scientific paper

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 106. 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

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