Title :
A compact first-order Bragg grating in a tapered fiber probe for high temperature sensing
Author :
Kou, Jun-long ; Qiu, Sun-jie ; Xu, Fei ; Lu, Yan-qing
Author_Institution :
Nat. Lab. of Solid State Microstructures, Nanjing Univ., Nanjing, China
Abstract :
We experimentally demonstrate an all-silica first-order fiber Bragg grating (FBG) for high temperature sensing by focused ion beam (FIB) machining in a fiber probe tapered to a point. This 61-period FBG is compact (~ 36.6 μm long and ~ 6.5 μm in diameter) with 200-nm-deep shallow grooves. We have tested the sensor from room temperature to around 500 °C and it shows a temperature sensitivity of nearly 20 pm/°C near the resonant wavelength of 1550 nm.
Keywords :
Bragg gratings; fibre optic sensors; focused ion beam technology; high-temperature techniques; 200-nm-deep shallow grooves; compact first-order Bragg grating; focused ion beam machining; high temperature sensing; resonant wavelength; tapered fiber probe; temperature 293 K to 298 K; temperature sensitivity; wavelength 1550 nm; Fiber gratings; Gratings; Optical fiber sensors; Temperature measurement; Temperature sensors;
Conference_Titel :
Lasers and Electro-Optics (CLEO), 2012 Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-4673-1839-6
