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武汉大学学报 英文版 | Wuhan University Journal of Natural Sciences
Wan Fang
Wuhan University
Latest Article
Frequency Stabilization and Linewidth Narrowing with Modulation Transfer Spectroscopy
ZHANG Xi1,2,3, LIU Hui1,2,3, JIANG Kunliang1,2,3, WANG Jinqi1,2,3, XIONG Zhuanxian1,2, HE Lingxiang1,2† , LÜ Baolong1,2
1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, Hubei, China; 2. Key Laboratory of Atomic Frequency Standards, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, Hubei, China; 3. School of Physics, University of Chinese Academy of Sciences, Beijing 100049, China
 We report laser frequency stabilization with modulation transfer spectroscopy (MTS) on 85Rb atoms. With both PZT (piezo-electric transducer) slow-loop feedback and current fast- loop feedback to the laser head, we get a linewidth narrowing less than 5 kHz simultaneously. Laser injection to a laser diode and frequency beating with another polarization spectroscopy based stabilization setup are also employed to check the narrow linewidth property. With the help of the technique, a linewidth around kHz-level laser is obtained and pave the way for the locking of the lattice laser of ytterbium clock with transfer cavity technique. The setup can be used as a frequency reference for precise frequency control of atomic clock system.
Key words: modulation transfer spectroscopy; frequency stabilization; linewidth; long-term drift
CLC number:O 433; O 562
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