Novel ultrahigh resolution optical fibre temperature sensor

Sven Poeggel, Dineshbabu Duraibabu, Gerard Dooly, Elfed Lewis, Gabriel Leen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper a novel patent pending high resolution optical fibre temperature sensor, based on an optical fibre pressure and temperature sensor (OFTPS), which is surrounded by an oil filled chamber, is presented. The OFPTS is based on a Fabry Perot interferometer (FPI) which has an embedded fibre Bragg grating (FBG). The high ratio between the volume of the oil filled outer cavity and the FPIs air filled cavity, results in a highly sensitive temperature sensor. The FBG element of the device can be used for wide range temperature measurements, and combining this capability with the high resolution capability of the FPI/oil cavity results in a wide range and high resolution temperature sensing device. The outer diameter of the sensor is less than 1mm in diameter and can be designed to be even smaller. The sensors temperature response was measured in a range of ΔT = 7K and resulted in a shift in the optical spectrum of ΔλF = 61.42nm. Therefore the Q-point of the reflected optical FPI spectrum is shifting with a sensitivity of sot = 8.77 nm/K. The sensitivity can easily be further increased by changing the oil/air volumetric ratio and therefore adapt the sensor to a wide variety of applications.

Original languageEnglish
Title of host publicationSixth European Workshop on Optical Fibre Sensors
EditorsElfed Lewis
PublisherSPIE
ISBN (Electronic)9781510602199
DOIs
Publication statusPublished - 2016
Event6th European Workshop on Optical Fibre Sensors - Limerick, Ireland
Duration: 31 May 20163 Jun 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume9916
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference6th European Workshop on Optical Fibre Sensors
Country/TerritoryIreland
CityLimerick
Period31/05/163/06/16

Keywords

  • Fabry Perot interferometer
  • High sensitivity
  • Optical fibre pressure temperature sensor

Fingerprint

Dive into the research topics of 'Novel ultrahigh resolution optical fibre temperature sensor'. Together they form a unique fingerprint.

Cite this