Title :
Thermal performance of metal-clad fiber Bragg grating sensors
Author :
Lin, Gang-Chih ; Wang, Likarn ; Yang, C.C. ; Shih, M.C. ; Chuang, T.J.
Author_Institution :
Inst. of Electro-Opt. Eng., Nat. Taiwan Univ., Taipei, Taiwan
fDate :
3/1/1998 12:00:00 AM
Abstract :
We demonstrate the higher temperature sensitivity of a fiber Bragg grating (FBG) sensor when it is clad with a metal of a large thermal expansion coefficient. With lead (solder) cladding, the sensitivity of Bragg wavelength shift can be enhanced by about five (four) times. A theoretical model was adopted to show quite consistent results. It was found that thermal annealing was crucial for preparing high-quality fiber Bragg grating sensors with metal claddings.
Keywords :
diffraction gratings; fibre optic sensors; metallic thin films; optical fibre cladding; sensitivity; thermal expansion; Bragg wavelength shift sensitivity; high-quality fiber Bragg grating sensors; higher temperature sensitivity; large thermal expansion coefficient; lead solder cladding; metal claddings; metal-clad fiber Bragg grating sensors; theoretical model; thermal annealing; thermal performance; Aluminum; Bragg gratings; Capacitive sensors; Fiber gratings; Lead; Optical fiber sensors; Refractive index; Temperature sensors; Thermal expansion; Thermal sensors;
Journal_Title :
Photonics Technology Letters, IEEE
