All optical fiber thermal vacuum gauge

Andrey E. Mironov, Nanjie Yu, Sehyun Park, Matthew Tuggle, Jane Gragg, Courtney Kucera, Thomas Hawkins, John Ballato, J. Gary Eden, Peter Dragic

Research output: Contribution to journalArticlepeer-review

Abstract

A new concept of an all optical, dual-fiber-based Pirani thermal vacuum gauge is proposed and demonstrated. The configuration utilizes two fibers: one that produces heat, and one that responds to the resultant thermal exchange. The temperature of the latter fiber is a function of the heat transfer through the gas in which it resides. The active heat-generating fiber is a luminescence-quenched, heavily Yb3+-doped optical fiber that efficiently produces thermal energy when optically pumped. The temperature sensor is implemented with a conventional commercial fiber Bragg grating. Both fibers are inserted into a custom vacuum chamber whose internal pressure can be carefully controlled. Performance of the system is characterized with pressures ranging from 20 mTorr to Standard Pressure. The proposed system may also be used as a sensitive flow rate sensor.

Original languageEnglish (US)
Article number014006
JournalJPhys Photonics
Volume2
Issue number1
DOIs
StatePublished - Jan 10 2020

Keywords

  • Optical fiber
  • Optical fiber sensors
  • Optical sensors
  • Pirani vacuum gauge
  • Pressure sensing

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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