Noticeable positive Doppler effect on optical bistability in an N-type active Raman gain atomic system |
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| Authors: | Chang Zeng-Guang a Niu Yue-Ping b Zhang Jing-Tao a and Gong Shang-Qing |
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| Affiliation: | 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 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 behaviour or greatly increase the bistable region,which has been known as the positive Doppler effect on optical bistability.In addition,we find that a positive Doppler effect can change optical bistability from the hybrid dispersion-gain type to a dispersive type. |
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| Keywords: | positive Doppler effect optical bistability N-type atomic system active Raman gain |
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