Photonic Sensors, 2014, 4 (3): 242, Published Online: Jul. 10, 2014
Simultaneous Force and Temperature Measurement Using Optical Microfiber Asymmetrical Interferometer
Abstract
A novel optical microfiber asymmetric Fabry-Perot interferometric (MAFPI) sensor is developed for simultaneous measurement of force and temperature. The MAFPI structure is formed by a weak fiber Bragg grating (FBG), a section of the microfiber, and a cleaved fiber end surface. The narrowband beam reflected from the low-reflectivity FBG and the broadband beam from the Fresnel reflection interfere lead to its unique sensing performance. The force sensing is performed by detecting the bending-loss induced fringe contrast changes, while the Bragg wavelength shift is employed for temperature measurement. Sensitivities of 9.8 pm/℃ and 0.025 dB/μN were obtained experimentally for temperature and force measurements, respectively.
Caibin YU, Xiaoxiao CHEN, Yuan GONG, Yu WU, Yunjiang RAO, Gangding PENG. Simultaneous Force and Temperature Measurement Using Optical Microfiber Asymmetrical Interferometer[J]. Photonic Sensors, 2014, 4(3): 242.