Dr. Yuan Zhao Profile

Dr. Yuan Zhao

at Huazhong Univ of Science and Techn

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Proceedings Article | 4 December 2020 Paper

Compact portable 795nm DFB diode laser system for atom interferometer

Yuan Zhao, Jun Gao, Jie Guo, Yuan Yao, Hongwei Song

Proceedings Volume 11617, 116173A (2020) https://doi.org/10.1117/12.2585442

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Here, we demonstrate a homemade compact portable 795nm DFB laser system for atom interferometer. The whole laser system including the control unit is integrated in a module with a dimension of 345 mm×275 mm×70 mm . The laser frequency is respect to ⁸⁷Rb D₁ line F=2→F’=2 transition by modulation transfer spectroscopy (MTS) technique. The short-term linewidth is less than 700kHz@1.68ms, and the short-term stability of frequency is less than 157.4 kHz@1.5min (standard deviation). The output power after a single mode polarization maintaining fiber is about 30 mW, and the laser power instability is better than 0.23%@11 h (RMS) and 2.4%@11 h (peak-to-peak value). The polarization extinction ratio (PER) for output fiber is specified to be greater than 25.9 dB, and the mode-hop-free tuning range is greater than15 GHz. The compact laser system has been applied in the state selection process of our atom interferometer and achieves about 90% state preparation efficiency.

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