Highly sensitive micro-hygrometer based on microfiber knot resonator

  • Qin Tian
  • , Hangzhou Yang
  • , Qiangzhou Rong
  • , Zhong Yao Feng
  • , Ruohui Wang
  • , Muhammad Khairol Annuar Bin Zaini
  • , Kok Sing Lim
  • , Harith Ahmad
  • , Pan Zhang
  • , Xiangzi Ding
  • , Kai Lu
  • , Yudong He

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

In this work, we experimentally demonstrated a microfiber knot resonator (MKR) for ambient relative humidity (RH) measurement. The microfiber device was manufactured by forming a ring from a low-loss microfiber, fabricated from a single-mode fiber (SMF) by using flame-heating technique. The resonator was successfully formed when a periodic output resonance spectrum was achieved. Without employing any coating hygroscopic material, the MKR was observed to highly sensitive to the variation of ambient RH ranging from of 30% RH to 94% RH. The proposed device is an extremely compact and fast response sensor, useful for a wide spectrum of industrial applications.

Original languageEnglish
Pages (from-to)88-92
Number of pages5
JournalOptics Communications
Volume431
DOIs
StatePublished - 15 Jan 2019

Keywords

  • Microfiber knot resonator
  • Optical fiber sensor
  • Relative humidity measurement

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