A silicon-tipped fiber-optic sensing platform with high resolution and fast response

Guigen Liu, Qiwen Sheng, Weilin Hou, Matthew L. Reinke, Ming Han

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In this article, we introduce an innovative and practically promising fiber-optic sensing platform (FOSP) that we proposed and demonstrated recently. This FOSP relies on a silicon Fabry-Perot interferometer (FPI) attached to the fiber end, referred to as Si-FOSP in this work. The Si- FOSP generates an interferogram determined by the optical path length (OPL) of the silicon cavity. Measurand alters the OPL and thus shifts the interferogram. Due to the unique optical and thermal properties of the silicon material, this Si-FOSP exhibits an advantageous performance in terms of sensitivity and speed. Furthermore, the mature silicon fabrication industry endows the Si-FOSP with excellent reproducibility and low cost toward practical applications. Depending on the specific applications, either a low-finesse or high-finesse version will be utilized, and two different data demodulation methods will be adopted accordingly. Detailed protocols for fabricating both versions of the Si-FOSP will be provided. Three representative applications and their according results will be shown. The first one is a prototype underwater thermometer for profiling the ocean thermoclines, the second one is a flow meter to measure flow speed in the ocean, and the last one is a bolometer used for monitoring exhaust radiation from magnetically confined high-temperature plasma.

Original languageEnglish (US)
Article numbere59026
JournalJournal of Visualized Experiments
Issue number143
StatePublished - Jan 2019


  • Bolometry
  • Engineering
  • Fabry-perot interferometer
  • Fiber-optic sensing
  • Flow sensors
  • Issue 143
  • Silicon
  • Temperature measurement

ASJC Scopus subject areas

  • General Neuroscience
  • General Chemical Engineering
  • General Biochemistry, Genetics and Molecular Biology
  • General Immunology and Microbiology


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