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  • CLEO/Europe and EQEC 2011 Conference Digest
  • OSA Technical Digest (CD) (Optica Publishing Group, 2011),
  • paper CH6_4

High Frequency Current Sensing using Optical Fiber Micro-wire

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Abstract

Fiber-optic current sensors exploiting the Faraday effect have attracted a great deal of interest due to their wide dynamic range, robustness and remote sensing capability. Recently a new approach to current sensing using optical fiber micro-wire (OFM) with 5 μm diameter in the configuration of a micro-coil (MC) has been proposed and successfully demonstrated [1]. It featured high compactness, robustness, configurability and excellent confinement of light and was able to demonstrate its ability to sense currents with a 1 μs rise time. In this paper we present a major improvement in the current sensing bandwidth, demonstrating a capability to detect a fast current pulse with pulse width (full width at half maximum: FWHM) of 6.7 ns.

© 2011 Optical Society of America

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