Title :
Coherent microwave transfer over a 204-km telecom fiber link by a cascaded system
Author :
Fujieda, Miho ; Kumagai, Motohiro ; Nagano, Shigeo
Author_Institution :
Nat. Inst. of Inf. & Commun. Technol., Koganei, Japan
Abstract :
We have demonstrated a microwave transfer over a 204-km noisy urban fiber link by a cascaded system with 2 stages, which connected 10-GHz and 1-GHz transfer systems in series. A diurnal phase-noise cancellation ratio of 45 dB was obtained by use of an electronic phase-noise compensation system. Additionally, the stabilities reached 6 ?? 10-14 at 1 s and 5 ?? 10-17 at one-half day, which agreed with the root-sumsquare of those of the 10-GHz and 1-GHz transfers. We verified for the first time that the transfer stability degrades only ??(N) times in a cascaded system with N stages.
Keywords :
optical links; phase noise; radio-over-fibre; cascaded system; distance 204 km; diurnal phase-noise cancellation ratio; electronic phase-noise compensation system; frequency 1 GHz; frequency 10 GHz; microwave transfer; noisy urban fiber link; telecom fiber link; time 1 s; Distributed feedback devices; Laser feedback; Masers; NIST; Optical attenuators; Optical feedback; Optical fibers; Optical filters; Phase noise; Telecommunications; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Microwaves; Optical Fibers; Reproducibility of Results; Sensitivity and Specificity; Telecommunications;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2010.1394
