Ultra-small microfiber Bragg grating force sensor with greater sensitivity

Wei Luo; Fei Xu; Yan-Qing Lu

doi:10.1117/12.2012447

26 October 2012 Ultra-small microfiber Bragg grating force sensor with greater sensitivity

Wei Luo, Fei Xu, Yan-Qing Lu

Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 8421CF (2012) https://doi.org/10.1117/12.2012447
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China

Abstract

We experimentally demonstrate a compact microfiber Bragg grating (MFBG) force sensor that offers greater sensitivity under load. The FBG is fabricated by focused ion beam (FIB) milling a microfiber tapered from nonphotosensitive standard single-mode fiber. It is only ~58μm in length. The force sensitivity of the MFBG is as high as ~4133nm/N around the resonant wavelength of 1550nm, which is three orders of magnitude larger than that recorded in FBGs inscribed in untapered fibers.

Citation Download Citation

Wei Luo, Fei Xu, and Yan-Qing Lu "Ultra-small microfiber Bragg grating force sensor with greater sensitivity", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 8421CF (26 October 2012); https://doi.org/10.1117/12.2012447

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