F. Nakagawa

collaborators

2 papers

physics.atom-ph2020

Absolute frequency of $^{87} Sr$ at $1.8 \times 1 0^{- 16}$ uncertainty by reference to remote Primary Frequency Standards

Nils Nemitz, Tadahiro Gotoh, Fumimaru Nakagawa +4

The optical lattice clock NICT-Sr1 regularly reports calibration measurements of the international timescale TAI. By comparing measurement results to the reports of eight Primary F…

physics.atom-ph2018

Months-long real-time generation of a time scale based on an optical clock

Hidekazu Hachisu, Fumimaru Nakagawa, Yuko Hanado +1

Time scales consistently provide precise time stamps and time intervals by combining atomic frequency standards with a reliable local oscillator. Optical frequency standards, howev…

Absolute frequency of 87Sr at 1.8×10−16 uncertainty by reference to remote Primary Frequency Standards

Months-long real-time generation of a time scale based on an optical clock

Absolute frequency of $^{87} Sr$ at $1.8 \times 1 0^{- 16}$ uncertainty by reference to remote Primary Frequency Standards