LI Ye, LIN Yige, WANG Qiang, YANG Tao, SUN Zhen, LU Bingkun, FANG Zhanjun. Ultra-Stable Laser Technology and its Realization in Strontium Optical Lattice Clock[J]. Metrology Science and Technology, 2021, 65(5): 62-66. DOI: 10.12338/j.issn.2096-9015.2020.9018
    Citation: LI Ye, LIN Yige, WANG Qiang, YANG Tao, SUN Zhen, LU Bingkun, FANG Zhanjun. Ultra-Stable Laser Technology and its Realization in Strontium Optical Lattice Clock[J]. Metrology Science and Technology, 2021, 65(5): 62-66. DOI: 10.12338/j.issn.2096-9015.2020.9018

    Ultra-Stable Laser Technology and its Realization in Strontium Optical Lattice Clock

    • National Institute of Metrology (NIM) has realized the ultra-stable laser systems of hundred Hz, Hz and sub Hz magnitudes in 2008, 2011, and 2018. This paper focuses on the methods and conditions for the realization of ultra-stable lasers of various indices, discusses the reference cavity, fast feedback locking technique, and precision control technique to suppress the influence of external environment on the length of the reference cavity, and obtain 10−15 or higher frequency stability of the ultra-stable laser. Experimentally, an external cavity diode laser (ECDL) is locked to the 30-cm-long high-finesse ULE reference cavity, and the frequency stability of 3×10−16 is achieved.
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