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Updated: Jun 17, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
Published on: August 5, 2013
Coherent microwave transfer over a 204-km telecom fiber link by a cascaded system
Miho Fujieda1, Motohiro Kumagai, Shigeo Nagano
1National Institute of Information and Communications Technology, Koganei, Japan. miho@nict.go.jp
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.
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