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A Current Sensor Based on Capillary Microresonator Filled with Terfenol-D Nanoparticles

  • Chang Qiu Yu
  • , Rui Niu
  • , Zhong Di Peng
  • , Hai Li
  • , Yong Ming Luo
  • , Tie Jun Zhou*
  • , Chun Hua Dong*
  • *Corresponding author for this work
  • Hangzhou Dianzi University
  • University of Science and Technology of China

Research output: Contribution to journalArticlepeer-review

Abstract

Electric current sensors are widely utilized in high-frequency power and electronic circuits which spread over numerous industries. Here, a current sensor based on the high-Q whispering gallery mode optical capillary microresonator filled with Terfenol-D nanoparticles is experimentally demonstrated. The device shows a peak AC current sensitivity of 5.285 {\mu }\text{A} Hz-1/2 with a corresponding high accuracy of 0.0009%. It possesses a wide detection frequency bandwidth of approximately 12 MHz and exhibits good linearity, enabling for partial discharge signals detection.

Original languageEnglish
Article number9336063
Pages (from-to)239-242
Number of pages4
JournalIEEE Photonics Technology Letters
Volume33
Issue number5
DOIs
StatePublished - 1 Mar 2021
Externally publishedYes

Keywords

  • Current measurement
  • magnetostrictive devices
  • optical resonator
  • optical sensors

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