Knowledge Management System Of National Time Service Center,CAS
| Interrogation of spin polarized clock transition in strontium optical lattice clock | |
Guo Yang1,2; Yin Mo-Juan1; Xu Qin-Fang1; Wang Ye-Bing1,2; Lu Ben-Quan1,2; Ren Jie1; Zhao Fang-Jing1,2; Chang Hong1
| |
| 2018-04-05 | |
| 发表期刊 | ACTA PHYSICA SINICA
 |
| ISSN | 1000-3290 |
| 卷号 | 67期号:7页码:8 |
| 摘要 | We demonstrate a spin-polarized clock transition spectrum of the Sr-87 optical lattice clock. The clock transition 5s(2) S-1(0) -> 5s5p P-3(0) of isotope Sr-87 has a hyperfine structure due to non-zero nuclear spin, inducing ten pi-polarized transitions from each individual m(F) state under the condition of a bias magnetic field along the probing polarization axis. In this experiment, atoms are driven to a certain m (F) state by a circular-polarization pump light to maximize the atomic population, which is beneficial to the stability and uncertainty evaluation of the optical lattice clock. After two stages: cooling and trapping, about 3. 5 x 10(6) atoms are trapped in the red magneto-optical trap with a temperature of 3.9 mu K. A grating-feedback external cavity diode laser with a tapered amplifier is used to build the optical lattice with a "magic-wavelength" of 813.426 nm. Both waists of the counter-propagating lattice beam along the horizontal direction are overlapped to form a one-dimensional optical lattice. The lifetime of the atoms trapped in the 1 D optical lattice is 1600 ms. The clock laser at 698 nm is a grating-feedback diode laser, which is locked to an ultra-low expansion cavity by the Pound-Drever-Hall technique to stabilize the frequency and phase. As a result, the linewidth of clock laser is narrowed to Hz level. By the normalized shelving method, we obtain a resolved sideband spectrum of Sr-87 5s(2) S-1(0) -> 5s5p P-3(0) transition. According to the spectrum, the lattice temperature along the longitudinal direction is approximately 4.2 mu K. After that a linewidth of 6.7 Hz of the degenerate clock transition is obtained at a probing time of 150 ms by utilizing a three-dimensional (3 D) bias magnetic field, which is used to eliminate the stray magnetic fields. Then a small bias magnetic field of 300 mGs is applied along the polarization axis of the lattice light to achieve the spectrum of Zeeman magnetic sublevels of the clock transition. Furthermore, the m(F) = +9/2 and m(F) = -9/2 magnetic sublevels are picked to be respectively pumped by the sigma(+)-polarized and sigma(-)-polarized light at 689 nm, a variable liquid crystal wave plate is employed to switch on both polarizations. Finally, the spin polarized clock transition spectrum is obtained at the interrogating pulse of 150 ms, and the linewidths of the m(F) = +9/2, m(F) = -9/2 magnetic sublevel transitions are 6.8 Hz and 6.2 Hz respectively. |
| 关键词 | strontium optical lattice clock observation of clock transition the spin-polarized spectrum |
| 资助者 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences |
| DOI | 10.7498/aps.67.20172759 |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[11474282] ; National Natural Science Foundation of China[61775220] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB21030700] ; key research project of frontier science of the Chinese Academy of Sciences[QYZDB-SSW-JSC004] |
| 资助者 | National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences ; key research project of frontier science of the Chinese Academy of Sciences |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Multidisciplinary |
| WOS记录号 | WOS:000443194200009 |
| 出版者 | CHINESE PHYSICAL SOC |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://210.72.145.45/handle/361003/11653 |
| 专题 | 中国科学院国家授时中心 |
| 通讯作者 | Chang Hong |
| 作者单位 | 1.Chinese Acad Sci, Key Lab Time & Frequency Primary Stand, Natl Time Serv Ctr, Xian 710600, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Sch Astron & Space Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo Yang,Yin Mo-Juan,Xu Qin-Fang,et al. Interrogation of spin polarized clock transition in strontium optical lattice clock[J]. ACTA PHYSICA SINICA,2018,67(7):8. |
| APA | Guo Yang.,Yin Mo-Juan.,Xu Qin-Fang.,Wang Ye-Bing.,Lu Ben-Quan.,...&Chang Hong.(2018).Interrogation of spin polarized clock transition in strontium optical lattice clock.ACTA PHYSICA SINICA,67(7),8. |
| MLA | Guo Yang,et al."Interrogation of spin polarized clock transition in strontium optical lattice clock".ACTA PHYSICA SINICA 67.7(2018):8. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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