Strontium optical lattice clock at the National Time Service Center
Wang Ye-Bing1, 2, Yin Mo-Juan1, Ren Jie1, Xu Qin-Fang1, Lu Ben-Quan1, 2, Han Jian-Xin1, 2, Guo Yang1, 2, Chang Hong1, †
       

(color online) Laser sources for the second stage of cooling and trapping. ISO4: optical isolators at 689 nm; FR1–2: Faraday Rotators at 689 nm; BS1–3: beam splitters with ratios between reflection and transmission of 3:7, 5:5, and 1:9, respectively; PBS8–13: polarizing beam splitters at 689 nm; λ/2: half-wave plate; λ/4: quarter-wave plate; M6–10: 45°-high-reflection mirrors at 689 nm; EOM1: electro-optic modulator; AOM7–11: acousto-optic modulators at 689 nm with frequency shifts of +100 MHz, −244 MHz, +1026 MHz, +195 MHz, and +195 MHz, respectively; GP1: Glan prism; LCWP: liquid-crystal wave-plate.