Title :
A Compact High Sensitivity Micro-Displacement Sensor Based on a Long-Period Fiber Grating with an Air-Cavity
Author :
Wang, Yunpeng ; Zhao, Chun-liu ; Qi, Liang ; Hu, Limin
Author_Institution :
Inst. of Optoelectron. Technol., China Jiliang Univ., Hangzhou, China
Abstract :
a compact high sensitivity micro-displacement sensor based on a long-period fiber grating (LPG) with an air-cavity is proposed and experimentally demonstrated. The sensor head is obtained by composing an air-cavity with a LPG and a single mode fiber (SMF). The shift of the wavelength of the LPG is depended on the length of the air gap. The experimental results show that the sensitivity 0.2155nm/μm is achieved within the measurement range of 0 to 140μm at the initial air gap length of about 216μm.
Keywords :
diffraction gratings; displacement measurement; fibre optic sensors; microsensors; air gap length; air-cavity; high sensitivity microdisplacement sensor; long-period fiber grating; single mode fiber; size 0 mum to 140 mum; Cavity resonators; Fiber gratings; Interference; Optical fiber sensors; Optical fibers; Sensitivity;
Conference_Titel :
Photonics and Optoelectronics (SOPO), 2012 Symposium on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4577-0909-8
DOI :
10.1109/SOPO.2012.6270482
