Open AccessFemtosecond-level timing fluctuation suppression in atmospheric frequency transfer with passive phase conjunction correction
Author(s) -
FanKo Sun,
Dong Hou,
Danian Zhang,
Jin Tian,
Jianguo Hu,
Xianhe Huang,
Shijun Chen
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.021312
Subject(s) - femtosecond , root mean square , frequency comb , optics , instability , phase (matter) , allan variance , physics , laser , standard deviation , statistics , mathematics , quantum mechanics , mechanics
We demonstrate femtosecond-level timing fluctuation suppression in indoor atmospheric comb-based frequency transfer with a passive phase conjunction correction technique. Timing fluctuations and Allan deviations are both measured to characterize the excess frequency instability incurred during the frequency transfer process. By transferring a 2 GHz microwave over a 52-m long free-space link in 5000 s, the total root-mean-square (RMS) timing fluctuation was measured to be about 280 fs with a fractional frequency instability on the order of 3 × 10 -13 at 1 s and 6 × 10 -17 at 1000 s. This atmospheric comb-based frequency transfer with passive phase conjunction correction can be used to build an atomic clock-based free-space frequency transmission link because its instability is less than that of a commercial Cs or H-master clock.