A transportable optical lattice clock at the National Time Service Center

Kong De-Huan^{1, 2}, Wang Zhi-Hui³, Guo Feng^{1, 2}, Zhang Qiang^{1, 2}, Lu Xiao-Tong^{1, 2}, Wang Ye-Bing¹, Chang Hong^{1, 2, †}

Schematic of 813 nm and 698 nm experimental setup. EOM: electro-optic modulator; AOM12: acousto-optic modulator at 698 nm with a frequency shift of –410 MHz; QWP: quarter-wave plate; HWP: half-wave plate; ISO: optical isolator; PBS: polarizing beam splitter; PD: photodetector; GTP: Gran–Taylor prism; DM: dichroic mirror; L: lens with focus length of 150 mm; PM fiber: single-mode polarization-maintaining fiber.