[CTuP7C] Quantum Optics with Atoms

[CTuP7C-03] 400-m-Long Polarization-Maintaining Fibers for Magneto-Optical Trapping of Francium Atoms

*Keisuke Nakamura¹, Shintaro Nagase², Teruhito Nakashita³, Tomohiro Hayamizu⁴, Takatoshi Aoki³, Hiroki Nagahama¹, Naoya Ozawa², Motoki Sato^3,4, Kazeki Yamane³, Mirai Fukase², Daisuke Uehara², Aiko Takamine⁴, Yasuhiro Sakemi¹ (1. Center for Nuclear Study, The University of Tokyo (Japan), 2. Department of Physics, the University of Tokyo (Japan), 3. Graduate School of Arts and Sciences, the University of Tokyo (Japan), 4. Nishina Center for Accelerator-Based Science, RIKEN (Japan))

[Presentation Style] Online

We installed a 400-m-long polarization-maintaining fiber link for magneto-optical trapping of Francium atoms. Fiber polarization stability of ~9×10^-4 was achieved with an averaging time of 10 seconds, which even allows fluorescence observation at 20 atoms.