Molardi, CarloTiago, PaixaoBeisenova, AidanaMin, RuiPaulo, AntunesMarques, CarlosBlanc, WilfriedTosi, Daniele2019-12-122019-12-122019-08-01Molardi, Carlo., Tiago, Paixao., Beisenova, Aidana., Min, Rui., Paulo, Antunes., Marques, Carlos., Blanc, Wilfried., Tosi, Daniele (2019) Fiber Bragg Grating (FBG) Sensors in a High-Scattering Optical Fiber Doped with MgO Nanoparticles for Polarization-Dependent Temperature Sensing. APPLIED SCIENCES-BASEL. Volume: 9 Issue: 15. DOI: 10.3390/app9153107http://nur.nu.edu.kz/handle/123456789/4426The characterization of Fiber Bragg Grating (FBG) sensors on a high-scattering fiber, having the core doped with MgO nanoparticles for polarization-dependent temperature sensing is reported. The fiber has a scattering level 37.2 dB higher than a single-mode fiber. FBGs have been inscribed by mean of a near-infrared femtosecond laser and a phase mask, with Bragg wavelength around 1552 nm. The characterization shows a thermal sensitivity of 11.45 pm/degrees C. A polarization-selective thermal behavior has been obtained, with sensitivity of 11.53 pm/degrees C for the perpendicular polarization (S) and 11.08 pm/degrees C for the parallel polarization (P), thus having 4.0% different sensitivity between the two polarizations. The results show the inscription of high-reflectivity FBGs onto a fiber core doped with nanoparticles, with the possibility of having reflectors into a fiber with tailored Rayleigh scattering properties.enAttribution-NonCommercial-ShareAlike 3.0 United StatesFiber Bragg Grating (FBG)Rayleigh scatteringenhanced backscattering fiberpolarization-sensitive deviceArticle