Fiber Bragg Grating (FBG) Sensors in a High-Scattering Optical Fiber Doped with MgO Nanoparticles for Polarization-Dependent Temperature Sensing
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Date
2019-08-01
Authors
Molardi, Carlo
Tiago, Paixao
Beisenova, Aidana
Min, Rui
Paulo, Antunes
Marques, Carlos
Blanc, Wilfried
Tosi, Daniele
Journal Title
Journal ISSN
Volume Title
Publisher
APPLIED SCIENCES-BASEL
Abstract
The 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.
Description
Keywords
Fiber Bragg Grating (FBG), Rayleigh scattering, enhanced backscattering fiber, polarization-sensitive device
Citation
Molardi, 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/app9153107