Very large optical rotation generated by Rb vapor in a multi-pass cell

Details Very large optical rotation generated by Rb vapor in a multi-pass cell Very large optical rotation generated by Rb vapor in a multi-pass cell

2011-08-26

arxiv.org/abs/1108.5334v1

Physics

Atomic Physics

4 pages, 4 figures

Scientific paper

Paramagnetic Faraday rotation is a powerful technique for atom sensing widely used in quantum non-demolition measurements, fundamental symmetry tests, and other precision measurements. We demonstrate the use of a multi-pass optical cell for Faraday rotation spectroscopy and observe polarization rotation in excess of 100 radians from spin-polarized Rb vapor. Unlike optical cavities, multi-pass cells have a deterministic number of light passes and can be used to measure large optical rotations. We also observe a 10-fold suppression of transverse spin relaxation when Rb atoms are placed in a coherent superposition state immune to spin-exchange collisions.

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