Title :
Thermal Regeneration in Etched-Core Fiber Bragg Grating
Author :
Hangzhou Yang ; Wu Yi Chong ; Yew Ken Cheong ; Kok-Sing Lim ; Pua, C.H. ; Harun, Sulaiman Wadi ; Ahmad, Harith
Author_Institution :
Photonics Res. Centre, Univ. of Malaya, Kuala Lumpur, Malaysia
Abstract :
Thermal regeneration is observed in etched-core fiber Bragg gratings (FBGs) with a fiber diameter of 5.6 μm. Etched-core FBGs are prepared by chemical etching using a hydrofluoric acid solution. Annealing is applied for all gratings to induce thermal regeneration. Thermal regeneration of FBG is observed at 680°C. The temperature sensitivity of regenerated etched-core FBGs is measured to be 13.9 pm/°C for a temperature range between 25°C and 700°C. With its high temperature resistance and large evanescent field interaction with its surrounding, thermally regenerated etched-core FBG has potential applications in high temperature sensing.
Keywords :
Bragg gratings; annealing; etching; fibre optic sensors; optical fibre fabrication; temperature sensors; annealing; chemical etching; etched-core fiber Bragg grating; evanescent field interaction; high temperature sensing; hydrofluoric acid solution; size 5.6 mum; temperature 25 degC to 700 degC; temperature resistance; thermal regeneration; Etched-core fiber Bragg grating (FBG); high temperature; regenerated fiber Bragg grating (RFBG);
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2013.2256344
