Open AccessRF Transfer by Optical Comb Over 50-km Fiber Link With $4.7\times 10^{-18}$ Instability
Author(s) -
Jianxiao Leng,
Guoyong Luo,
Dawei Li,
Shanglin Li,
Cheng Qian,
Jianye Zhao
Publication year - 2016
Publication title -
ieee photonics journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.725
H-Index - 73
eISSN - 1943-0655
pISSN - 1943-0647
DOI - 10.1109/jphot.2016.2520830
Subject(s) - engineered materials, dielectrics and plasmas , photonics and electrooptics
A radio-frequency (RF) dissemination system using an optical comb over a 50-km fiber link has been demonstrated in this paper. An optical filter is utilized to suppress the dispersion influence of the optical comb in the transfer fiber link. The compensation scheme, based on an electrical compensation structure with an optical-microwave phase detector, cancels the phase fluctuation introduced by the temperature variation and the mechanical vibration in the transfer fiber link. It has been demonstrated that the relative frequency instability of a 100-MHz transfer signal is 1.9 × 10-14 at 1 s and 4.7 × 10-18 at 16400 s. It indicates that our frequency dissemination system can be used to transfer the most precise RF signal in the world to meet the demand of multiply applications.