Journal ArticleDOI
Ultrahigh enhancement in absolute and relative rotation sensing using fast and slow light
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In this paper, the authors 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.Abstract:
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.read more
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References
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Journal ArticleDOI
Light speed reduction to 17 metres per second in an ultracold atomic gas
Lene Vestergaard Hau,Lene Vestergaard Hau,Stephen E. Harris,Zachary Dutton,Zachary Dutton,Cyrus H. Behroozi,Cyrus H. Behroozi +6 more
TL;DR: In this paper, an experimental demonstration of electromagnetically induced transparency in an ultracold gas of sodium atoms, in which the optical pulses propagate at twenty million times slower than the speed of light in a vacuum, is presented.
Journal ArticleDOI
Gain-assisted superluminal light propagation
TL;DR: Gain-assisted linear anomalous dispersion is used to demonstrate superluminal light propagation in atomic caesium gas and is observed to be a direct consequence of classical interference between its different frequency components in an anomalously dispersion region.
Journal ArticleDOI
Observation of ultraslow and stored light pulses in a solid.
A.V. Turukhin,V. S. Sudarshanam,M. S. Shahriar,Joseph A. Musser,Byoung S. Ham,Philip R. Hemmer +5 more
TL;DR: Low group velocities of light in an optically dense crystal of Pr doped Y2SiO5 are reported by using a sharp spectral feature in absorption and dispersion that is produced by resonance Raman excitation of a ground-state spin coherence.
Journal ArticleDOI
Superluminal and Slow Light Propagation in a Room-Temperature Solid
TL;DR: It is observed that ions in mirror sites are inversely saturable and cause superluminal light propagation, whereas ions in inversion sites experience conventional saturable absorption and produce slow light.