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Laser 728 nm Spectroscopy of Electrodeless Discharge Rb Lamp |
| LIU Zhong-Zheng1, XUE Xiao-Bo1, NIU Fu-Zeng1, ZHANG Li-Guo1, LING Li1,2, CHEN Jing-Biao1** |
1State Key Laboratory of Advanced Optical Communication System and Network, Institute of Quantum Electronics, School of Electronics Engineering & Computer Science, Peking University, Beijing 100871
2Institute of Information and Electronics, Zhejiang University City College, Hangzhou 310015
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LIU Zhong-Zheng, XUE Xiao-Bo, NIU Fu-Zeng et al 2014 Chin. Phys. Lett. 31 120601 |
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Abstract We mainly report the 728.0 nm transition between 7S1/2 and 5P1/2 laser spectroscopy of an electrodeless discharge Rb vapor lamp, which is the clock transition of a potential four-level active optical clock, once laser cooled and trapped Rb atoms are pumped by 359.2 nm laser. To realize this proposition, we study the linewidth and absorption characteristics of the 728.0 nm laser absorption spectrum of a rubidium electrodeless discharge vapor lamp with varying lamp temperature and rf driving power respectively, measured by an external cavity diode laser in a Littrow configuration. The measured 728.0 nm spectrum of a glass cell filled with Rb and Ar buffer gases in the electrodeless discharge Rb lamp based Faraday filter stabilized laser can be a heterodyne comparison reference for the weak power output of a possible cold Rb four-level active optical clock at 728.0 nm clock transition with laser cooled and trapped atoms. To the best of our knowledge, there has not been any research reported on Rb 728.0 nm laser spectroscopy in detail.
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Published: 12 January 2015
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