Title :
Enhanced sensitivity fibre optic long period grating temperature sensor
Author :
James, S.W. ; Khaliq, S. ; Tatam, R.P.
Author_Institution :
Centre for Photonics & Opt. Eng., Cranfield Univ., Bedford, UK
Abstract :
In this paper we demonstrate a simple technique for forming a fibre optic long period grating (LPG) with enhanced temperature sensitivity by surrounding the LPG with a material with a high thermo-optic coefficient, thus exploiting both the temperature and external refractive index sensitivity of the LPG. The operating temperature and measurement ranges are determined by the attenuation band that is monitored, and the refractive index and the thermo-optic coefficient of the surrounding material.
Keywords :
diffraction gratings; fibre optic sensors; refractive index; temperature sensors; thermo-optical effects; attenuation band; fibre optic long period grating temperature sensor; refractive index; thermo-optic coefficient; Attenuation measurement; Fiber gratings; Fiber optics; Monitoring; Optical attenuators; Optical materials; Refractive index; Temperature distribution; Temperature measurement; Temperature sensors;
Conference_Titel :
Optical Fiber Sensors Conference Technical Digest, 2002. Ofs 2002, 15th
Conference_Location :
Portland, OR, USA
Print_ISBN :
0-7803-7289-1
DOI :
10.1109/OFS.2002.1000521
