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Temperature Independent Tapered Fiber Bragg Grating-Based Inclinometer

2015; Institute of Electrical and Electronics Engineers; Volume: 27; Issue: 21 Linguagem: Inglês

10.1109/lpt.2015.2462334

1941-0174

Tomasz Osuch, Konrad Markowski, Kazimierz Jędrzejewski,

Photonic Crystal and Fiber Optics

A new concept for an optical fiber inclinometer based on tapered fiber Bragg grating (TFBG) is presented. The sensor was characterized by the experimental measurement of the dependence of inclination angle on the spectral response in fluctuating temperature conditions. The research showed that the TFBG made it possible to simultaneously measure both the inclination angle and temperature, and to operate as a temperature insensitive 0°-90° tilt sensor, in a different interrogation regime. Inscription of the FBG in the tapered optical fiber section offered not only sensor miniaturization, but also the possibility of temperature sensing by the fiber section adjacent to the inclination area. Moreover, due to the reflective mode of the TFBG, the sensor offers excellent sensitivity due to the double-loss operation.