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Magic Wavelengths for a Lattice Trapped Rubidium Four-Level Active Optical Clock |
| ZANG Xiao-Run, ZHANG Tong-Gang, CHEN Jing-Biao** |
| Institute of Quantum Electronics, and State Key Laboratory of Advanced Optical Communication System & Network, School of Electronics Engineering and Computer Science, Peking University, Beijing 100871 |
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ZANG Xiao-Run, ZHANG Tong-Gang, CHEN Jing-Biao 2012 Chin. Phys. Lett. 29 090601 |
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Abstract After being pumped from the 5s1/2 ground state to the 6p1/2 state, the population inversion between 6s1/2 and 5p1/2,3/2 can be established for a rubidium four-level active optical clock. We calculate the ac Stark shift due to lattice trapping laser which dominates the frequency shift of clock transition in a lattice trapped rubidium four-level active optical clock. Several magic wavelengths are found, which can form desired optical lattice trapping potential. By choosing a proper intensity and linewidth of the trapping laser, the fractional frequency uncertainty of clock transition due to the ac Stark shift of the trapping laser, is estimated to be below 10−18.
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Received: 25 May 2012
Published: 01 October 2012
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