Open AccessFrequency Measurement System of Optical Clocks Without a Flywheel Oscillator
Author(s) -
Miho Fujieda,
Tetsuya Ido,
Hidekazu Hachisu,
Tadahiro Gotoh,
Hiroshi Takiguchi,
Kazuhiro Hayasaka,
Kenji Toyoda,
Kenji Yonegaki,
Utako Tanaka,
Shinji Urabe
Publication year - 2016
Publication title -
ieee transactions on ultrasonics, ferroelectrics, and frequency control
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.159
H-Index - 136
eISSN - 1525-8955
pISSN - 0885-3010
DOI - 10.1109/tuffc.2016.2615119
Subject(s) - fields, waves and electromagnetics
We developed a system for the remote frequency comparison of optical clocks. The system does not require a flywheel oscillator at the remote end, making it possible to evaluate optical frequencies even in laboratories, where no stable microwave reference, such as an Rb clock, a Cs clock, or a hydrogen maser exists. The system is established by the integration of several systems: a portable carrier-phase two-way satellite frequency transfer station and a microwave signal generation system by an optical frequency comb from an optical clock. The measurement was as quick as a conventional method that employs a local microwave reference. We confirmed the system uncertainty and instability to be at the low 10-15 level using an Sr lattice clock.