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

Volume

10

Issue

3

fYear

1998

fDate

3/1/1998 12:00:00 AM

Firstpage

406

Lastpage

408

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;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/68.661425

Filename

661425