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Phys. Rev. A 80, 041805(R) (2009) [4 pages]

Electromagnetically induced transparency with noisy lasers

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Yanhong Xiao1,2, Tun Wang3,4, Maria Baryakhtar5, Mackenzie Van Camp6, Michael Crescimanno7, Michael Hohensee2,5, Liang Jiang5, David F. Phillips2, Mikhail D. Lukin5, Susanne F. Yelin3,8, and Ronald L. Walsworth2,5
1Department of Physics, Surface Physics Laboratory (National Key Laboratory), and Laboratory of Advanced Materials, Fudan University, Shanghai 200433, People's Republic of China
2Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA
3Department of Physics, University of Connecticut, Storrs, Connecticut 06269, USA
4Institute for Theoretical Physics, University of Innsbruck, 6020 Innsbruck, Austria
5Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
6Department of Physics, Lawrence University, Appleton, Wisconsin 54912, USA
7Department of Physics and Astronomy, Youngstown State University, Youngstown, Ohio 44555-2001, USA
8ITAMP, Cambridge, Massachusetts 02138, USA

Received 22 August 2008; published 9 October 2009

We demonstrate and characterize two coherent phenomena that can mitigate the effects of laser phase noise for electromagnetically induced transparency (EIT): a laser-power-broadening-resistant resonance in the transmitted intensity cross correlation between EIT optical fields, and a resonant suppression of the conversion of laser phase noise to intensity noise when one-photon noise dominates over two-photon-detuning noise. Our experimental observations are in good agreement with both an intuitive physical picture and numerical calculations. The results have wide-ranging applications to spectroscopy, atomic clocks, and magnetometers.

© 2009 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevA.80.041805
DOI:
10.1103/PhysRevA.80.041805
PACS:
42.50.Gy, 32.70.Jz, 42.50.Md