Velocity Transfer Spectroscopy of Rb 420 nm Transition

We propose and demonstrate the velocity transfer spectroscopy of a V-type energy structure with Rb atoms at 420nm transition. The weak oscillator strength of a lower excited state for V-type energy structure atoms limits the high signal-to-noise ratio of atomic laser spectroscopy, which can be usual...

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Published inChinese physics letters Vol. 31; no. 8; pp. 46 - 48
Main Author 张理国 刘忠征 陶智明 凌俐 陈景标
Format Journal Article
LanguageEnglish
Published 01.08.2014
Subjects
Atomic beam spectroscopy
Atomic structure
Energy levels
Excitation spectra
Lasers
Optical pumping
Oscillator strengths
Spectroscopy
传输光谱
低激发态
双共振
振子强度
激光光谱学
能源结构
转换速度
铷原子
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ISSN0256-307X
1741-3540
DOI10.1088/0256-307X/31/8/083101

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Summary:We propose and demonstrate the velocity transfer spectroscopy of a V-type energy structure with Rb atoms at 420nm transition. The weak oscillator strength of a lower excited state for V-type energy structure atoms limits the high signal-to-noise ratio of atomic laser spectroscopy, which can be usually realized by optical-optical double-resonance or double-resonance optical pumping for cascade-type energy structure atoms. For ^87Rb atoms, the weak 420 nm transition spectrum between the energy level of 5^2S1/2 and 6^2P3/2 is transferred to the spectrum on lower excited states at 780nm with strong oscillator strength, which is recorded by a 780 nm probe laser. This method, which ＆ similar to the electron-shelving detection method, at a certain degree can indirectly measure a higher excited state transition with weak oscillator strength for any V-type energy structure of atoms by transferring the transition spectrum information of the very weak oscillator strength to the strong oscillator strength in an optical-optical double-resonance configuration.
Bibliography:11-1959/O4
We propose and demonstrate the velocity transfer spectroscopy of a V-type energy structure with Rb atoms at 420nm transition. The weak oscillator strength of a lower excited state for V-type energy structure atoms limits the high signal-to-noise ratio of atomic laser spectroscopy, which can be usually realized by optical-optical double-resonance or double-resonance optical pumping for cascade-type energy structure atoms. For ^87Rb atoms, the weak 420 nm transition spectrum between the energy level of 5^2S1/2 and 6^2P3/2 is transferred to the spectrum on lower excited states at 780nm with strong oscillator strength, which is recorded by a 780 nm probe laser. This method, which ＆ similar to the electron-shelving detection method, at a certain degree can indirectly measure a higher excited state transition with weak oscillator strength for any V-type energy structure of atoms by transferring the transition spectrum information of the very weak oscillator strength to the strong oscillator strength in an optical-optical double-resonance configuration.
ZHANG Li-Guo, LIU Zhong-Zheng, TAO Zhi-Ming, CHEN Jing-Biao（ 1State Key Laboratory of Advanced Optical Communication System and Network, Institute of Quantum Electronics School of Electronics Engineering and Computer Science, Peking University, Beijing 100871 2Department of Physics, Bijie University, Bijie 551700 3Institute of Information and Electronics, Zhejiang University City College, Hangzhou 310015）
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ISSN:0256-307X
1741-3540
DOI:10.1088/0256-307X/31/8/083101