[5p-A402-1~6] Novel optical metrologies based on advanced photonics

[5p-A402-3] Timescale signal with reference to an optical lattice clock

〇Tetsuya Ido¹, Hidekazu Hachisu¹, Fumimaru Nakagawa¹, Yuko Hanado¹ (1.NICT)

Keywords:optical lattice clock, timescale, optical frequency standard

We realized a timesale with the precision of 10^-16 level contiunuously for a half year by refering an optical lattice clock intermittently operated once per week. The signal also demonstrated that scale interval of Universal Coordinated Time (UTC) is apart from the SI second in 10^-16 level. The proposed scheme of intermittent operation of optical clocks enables a realization of precision timescale one order of magnitude more accurate, and also partly replaces a role of Cs fountain frequency standards which serve in the calibration of the UTC scale interval.