A transportable optical lattice clock at the National Time Service Center

• 作者: De-Huan Kong Feng Guo Hong Chang Qiang Zhang Xiao-Tong Lu Ye-Bing Wang Zhi-Hui Wang
• 来源期刊: 中国物理B（英文版）
• 关键词: optical lattice clock strontium atoms spin-polarized spectra instability
• 年，卷（期）: 2020,（7）
• 页码范围: 101-108
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab9290

摘要

We report a transportable one-dimensional optical lattice clock based on 87Sr at the National Time Service Center.The transportable apparatus consists of a compact vacuum system and compact optical subsystems.The vacuum system with a size of 90 cm×20 cm×42 cm and the beam distributors are assembled on a double-layer optical breadboard.The modularized optical subsystems are integrated on independent optical breadboards.By using a 230 ms clock laser pulse,spin-polarized spectroscopy with a linewidth of 4.8 Hz is obtained which is close to the 3.9 Hz Fourier-limit linewidth.The time interleaved self-comparison frequency instability is determined to be 6.3 × 10-17 at an averaging time of 2000 s.