Separated-cavity Fabry-Perot interferometric gas pressure sensor based on hollow core Bragg fiber and Vernier effect

Zongru Yang, Weihao Yuan, Changyuan Yu

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

An ultra-high sensitivity separated Fabry-Perot interferometers (FPIs) sensor for gas pressure measurement based on hollow core Bragg fiber (HCBF) and Vernier effect is proposed. The HCBF functions as an FPI cavity and possesses low transmission loss. The sensing unit was prepared by splicing an HCBF at the millimeter scale between the single-mode fiber (SMF) and the hollow silica tube (HST). The reference unit was fabricated by sandwiching the HCBF between two SMFs. Both FPIs with similar free spectral ranges (FSRs) were connected to the 3-dB coupler parallelly to generate the Vernier effect. Experimental results showed that the proposed sensor achieved high gas pressure sensitivity of 77.80 nm/MPa with a linearity of 0.9992. Moreover, a low-temperature crosstalk of ∼0.095 kPa/℃ implies that the sensor is temperature insensitive. Compared to the traditional optical fiber gas pressure sensor, the proposed sensor features high sensitivity, stability, easy fabrication, and fast response.

Original languageEnglish
Title of host publicationOptoelectronic Devices and Integration XI
EditorsXuping Zhang, Baojun Li, Changyuan Yu, Xinliang Zhang
PublisherSPIE
ISBN (Electronic)9781510656949
DOIs
Publication statusPublished - Dec 2022
EventOptoelectronic Devices and Integration XI 2022 - Virtual, Online, China
Duration: 5 Dec 202211 Dec 2022

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12314
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptoelectronic Devices and Integration XI 2022
Country/TerritoryChina
CityVirtual, Online
Period5/12/2211/12/22

Keywords

  • Fabry-Perot interferometer
  • gas pressure
  • Hollow core Bragg fiber
  • optical Vernier effect

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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