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Noticeable positive Doppler effect on optical bistability in an N-type active Raman gain atomic system |
Chang Zeng-Guang (常增光)a, Niu Yue-Ping (钮月萍)b, Zhang Jing-Tao (张敬涛)a, Gong Shang-Qing (龚尚庆 )b |
a State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; b Department of Physics, East China University of Science and Technology, Shanghai 200237, China |
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Abstract We theoretically investigate the Doppler effect on the optical bistability in an N-type active Raman gain atomic system inside an optical ring cavity. It is shown that the Doppler effect can greatly enhance the dispersion and thus create the bistable behavior or greatly increase the bistable region, which has been known as the positive Doppler effect on the optical bistability. In addition, we find that the positive Doppler effect can change the optical bistability from the hybrid dispersion-gain type to the dispersive type.
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Received: 01 February 2012
Revised: 23 April 2012
Accepted manuscript online:
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PACS:
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42.65.Pc
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(Optical bistability, multistability, and switching, including local field effects)
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42.50.Gy
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(Effects of atomic coherence on propagation, absorption, and Amplification of light; electromagnetically induced transparency and Absorption)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 60978013) and the Shanghai Rising Star Project, China (Grant No. 11QA1407400). |
Corresponding Authors:
Gong Shang-Qing
E-mail: sqgong@siom.ac.cn
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Cite this article:
Chang Zeng-Guang (常增光), Niu Yue-Ping (钮月萍), Zhang Jing-Tao (张敬涛), Gong Shang-Qing (龚尚庆 ) Noticeable positive Doppler effect on optical bistability in an N-type active Raman gain atomic system 2012 Chin. Phys. B 21 114210
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