title: Coherent microwave transfer over a 204-km telecom fiber link by a cascaded system.
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 x 10(-14) at 1 s and 5 x 10(-17) at one-half day, which agreed with the root-sum-square of those of the 10-GHz and 1-GHz transfers. We verified for the first time that the transfer stability degrades only square root N times in a cascaded system with N stages.
authors.affiliation: National Institute of Information and Communications Technology, Koganei, Japan. miho@nict.go.jp
authors.forename: Miho
authors.initials: M
authors.lastname: Fujieda
authors.forename: Motohiro
authors.initials: M
authors.lastname: Kumagai
authors.forename: Shigeo
authors.initials: S
authors.lastname: Nagano
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008872:Microwaves; D055100:Optical Fibers; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013685:Telecommunications / Q000295:instrumentation*