Optical direct comparison of 87Sr optical lattice clocks using a >50 km telecommunication fiber link

Hidekazu Hachisu; Atsushi Yamaguchi; Miho Fujieda; Motohiro Kumagai; Shigeo Nagano; Ying Li; Tetsuya Ido; Tetsushi Takano; Masao Takamoto; Hidetoshi Katori

doi:10.1117/12.893357

12 September 2011 Optical direct comparison of ⁸⁷Sr optical lattice clocks using a >50 km telecommunication fiber link

Hidekazu Hachisu, Atsushi Yamaguchi, Miho Fujieda, Motohiro Kumagai, Shigeo Nagano, Ying Li, Tetsuya Ido, Tetsushi Takano, Masao Takamoto, Hidetoshi Katori

Author Affiliations +

Proceedings Volume 8132, Time and Frequency Metrology III; 81320A (2011) https://doi.org/10.1117/12.893357
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

An ⁸⁷Sr-based-optical lattice clock in NICT is compared to that of The University of Tokyo using a >50 km fiber link. In this work, we have demonstrated for the first time that two distant Sr lattice clocks generate the same frequency with systematic uncertainty of 0.31 Hz (7.3 × 10^-16 fractionally) for the 429 THz clock frequency.

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Hidekazu Hachisu, Atsushi Yamaguchi, Miho Fujieda, Motohiro Kumagai, Shigeo Nagano, Ying Li, Tetsuya Ido, Tetsushi Takano, Masao Takamoto, and Hidetoshi Katori "Optical direct comparison of ⁸⁷Sr optical lattice clocks using a >50 km telecommunication fiber link", Proc. SPIE 8132, Time and Frequency Metrology III, 81320A (12 September 2011); https://doi.org/10.1117/12.893357

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