Related Experiment Video
Updated: Jun 19, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
Published on: November 7, 2016
Stable radio frequency transfer in 114 km urban optical fiber link
Motohiro Kumagai1, Miho Fujieda, Shigeo Nagano
1National Institute of Information and Communications Technology, 4-6-1 Nukuikitamachi, Koganei, Tokyo 1848795, Japan. mkumagai@nict.go.jp
Abstract:
An rf dissemination system using an optical fiber link has been developed. The phase noise induced during optical fiber transmission has been successfully cancelled using what we believe to be a novel fiber-noise compensation system with a combination of electrical and optical compensations. We have performed rf transfer in a 114 km urban telecom fiber link in Tokyo with a transfer stability of 10(-18) level at an averaging time of 1 day. Additionally, a high degree of continuous operation robustness has been confirmed.
Related Concept Videos
Propagation Speed of Electromagnetic Waves
Transmission Line Design Considerations
Energy Stored In A Coaxial Cable
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field inside...
Cable Subjected to a Distributed Load
