Title :
Highly Integrated FP/FBG Sensor for Simultaneous Measurement of High Temperature and Strain
Author :
Qin Liu ; Zeng Ling Ran ; Yun Jiang Rao ; Shu Cheng Luo ; Hui Qin Yang ; Ya Huang
Author_Institution :
Key Lab. of Opt. Fiber Sensing & Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
An inline fiber-optic micro-Fabry-Perot (MFP) cavity and a short fiber Bragg grating (SFBG) is overlapped to form an integrated MFP/SFBG sensor for simultaneous measurement of temperature and strain under high temperature (300 °C). The FP cavity is fabricated on a GeO2-doped photon sensitive fiber using the 157-nm laser micromachining technique and the SFBG is written at the same position of the MFP cavity using the standard 248-nm laser method. As the MFP cavity and SFBG have different sensitivity coefficients to temperature and strain, they can be utilized for realization of simultaneous measurement of dual parameters.
Keywords :
Bragg gratings; fibre optic sensors; germanium compounds; integrated optics; laser beam machining; micro-optics; microcavities; micromachining; microsensors; strain measurement; strain sensors; temperature measurement; temperature sensors; GeO2-doped photon sensitive fiber; MFP cavity; SFBG; high temperature measurement; inline fiber-optic microFabry-Perot cavity; integrated FP-FBG sensor; laser micromachining technique; sensitivity coefficients; short fiber Bragg grating; strain measurement; temperature 300 degC; wavelength 157 nm; wavelength 248 nm; Cavity resonators; Optical fiber sensors; Optical fibers; Strain; Strain measurement; Temperature measurement; Temperature sensors; FBG; High temperature; laser micromachining; micro cavity; simultaneous measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2014.2331359
