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Conference on Lasers and Electro-Optics

Counterpropagating Pair of Superluminal Raman Lasers without Cross-Talks for Ultrasensitive Rotation Sensing

Zifan Zhou, Minchuan Zhou, M. S. Shahriar

Published Jan 1, 2020• 0 citations
Publisher

Abstract

We have demonstrated a pair of counter-propagating superluminal Raman lasers without cross-talk, employing two different gain cells, each containing two isotopes of Rb, as a key step in realizing an ultrasensitive rotation sensor.
DOI
10.1364/cleo_at.2020.jw2b.32

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Get PDF Email Share Share with Facebook Share on X Post on reddit Share with LinkedIn Add to Mendeley Add to BibSonomy Share with WeChat Get Citation Copy Citation Text Z. Zhou, J. Yablon, and M. S. Shahriar, "Realization of a superluminal Raman laser using adjacent transitions in two isotopes of Rb," in Frontiers in Optics 2016, OSA Technical Digest (online) (Optica Publishing Group, 2016), paper JTh2A.102. Export Citation BibTex Endnote (RIS) HTML Plain Text Citation alert Save article
We show that group velocity of light far exceeding the vacuum speed can be realized when a medium that produces a narrow band dip in the gain profile is placed inside a ring laser. The dip leads to an effective negative dispersion, which can be tuned to produce a very small group index. The rotational sensitivity of the ring laser is enhanced by a factor equaling the inverse of the group index. For a realistic system, the enhancement factor can be as high as 1.8*105. In order to realize such a device, the background gain can be produced by using, for example, an optically pumped Ti:Sapphire crystal, a semiconductor optical amplifier, or a diode pumped alkali laser. The narrow dip can be produced, for example, by a Rb cell configured for Raman depletion. Here, we present the theoretical model behind such a superluminal laser, and describe a preliminary experiment for realizing such a device.