Observation of Quantum Beating from Two Coupled Parametric Six-Wave Mixing Signals in Rb
ZHU Chang-Jun1, HE Jun-Fang2, ZHAI Xue-Jun1, XUE Bing1
1Department of Physics, School of Science, Xi'an Polytechnic University, Xi'an 7100482State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119
Observation of Quantum Beating from Two Coupled Parametric Six-Wave Mixing Signals in Rb
ZHU Chang-Jun1, HE Jun-Fang2, ZHAI Xue-Jun1, XUE Bing1
1Department of Physics, School of Science, Xi'an Polytechnic University, Xi'an 7100482State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi'an 710119
摘要Two processes of coupled difference-frequency axially phase-matched parametric six-wave mixing are carried out in Rb vapour by two-photon excitation using fs laser pulses, and parametric six-wave mixing signals in the infrared and near infrared regime are detected. The infrared parametric six-wave mixing signals are up-converted into the visible spectral range by sum-frequency mixing with the pump laser in a LiIO3 crystal. Moreover, quantum beating at 608cm-1, corresponding to the 7s-5d energy difference in Rb, is observed from the sum-frequency signal at 495nm. As a result, we obtain modulated light signals in the visible, near infrared and infrared spectral ranges, and study the interference between 7s and 5d states of Rb.
Abstract：Two processes of coupled difference-frequency axially phase-matched parametric six-wave mixing are carried out in Rb vapour by two-photon excitation using fs laser pulses, and parametric six-wave mixing signals in the infrared and near infrared regime are detected. The infrared parametric six-wave mixing signals are up-converted into the visible spectral range by sum-frequency mixing with the pump laser in a LiIO3 crystal. Moreover, quantum beating at 608cm-1, corresponding to the 7s-5d energy difference in Rb, is observed from the sum-frequency signal at 495nm. As a result, we obtain modulated light signals in the visible, near infrared and infrared spectral ranges, and study the interference between 7s and 5d states of Rb.
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2008, Vol. 25 
