Stable radio-frequency delivery by λ dispersion-induced optical tunable delay.
We propose and demonstrate a novel stable radio frequency (RF) delivery system based on a radio-over-fiber link. The proposed scheme acts as a long phase-locking loop where an optical tunable delay line is involved to compensate dynamically for the time-delay variation that arises from fiber-link fluctuation. An optical carrier with variable wavelength under fiber-link dispersion results in the desired tunable delay. The tunable range is in proportion to the length of the fiber link, so a large phase-error correction capacity under long-distance delivery can be realized. The large as well as fine optical-delay tunability is experimentally demonstrated, and the RF reference of 2.42 GHz is transferred for 54 km where a time jitter compression factor of 588 is achieved.
State Key Laboratory of Information Photonics & Optical Communications (Beijing University of Posts and Telecommunications), Beijing, China.
Anxu
A
Zhang
Yitang
Y
Dai
Feifei
F
Yin
Tianpeng
T
Ren
Kun
K
Xu
Jianqiang
J
Li
Yuefeng
Y
Ji
Jintong
J
Lin
Geshi
G
Tang