Rapid evaluation of time scale using an optical clock

8th Symposium on Frequency Standards and Metrology 2015

Ido, T.^1 ; Hachisu, H.^1 ; Nakagawa, F.^1 ; Hanado, Y.^1

Space-Time Standards Laboratory, National Institute of Information and Communications Technology (NICT), Koganei, Tokyo

184-8795, Japan^1

关键词: Calibration data;    Continuous operation;    Optical clocks;    Optical frequency standard;    Time-scales;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/723/1/012041/pdf
DOI  :  10.1088/1742-6596/723/1/012041

来源: IOP

【 摘 要 】

Feasibility of steering a time scale using an optical clock is investigated. Since the high stability of optical frequency standards enables rapid evaluation of the scale interval, the requirement for the continuous operation is mitigated. Numerical simulations with the input of real calibration data by a87Sr lattice clock indicated that the calibrations once in two weeks maintain the time scale within 5 ns level using a currently available hydrogen maser at NICT. "Optical" steering of a time scale by the intermittent calibrations frees an optical frequency standard from being dedicated to the steering, enabling other applications using the same apparatus.