期刊
SENSORS
卷 18, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/s18030918
关键词
long period gratings; optical fibers; optical fiber sensors; refractive index sensors; sensors fabrication; strain sensors; temperature sensors
资金
- University of Naples Parthenope through the Bando di sostegno alla ricerca individuale per triennio, Annualita
In this work, we report about our recent results concerning the fabrication of Long Period Grating (LPG) sensors in several optical fibers, through the Electric Arc Discharge (EAD) technique. In particular, the following silica fibers with both different dopants and geometrical structures are considered: standard Ge-doped, photosensitive B/Ge codoped, P-doped, pure-silica core with F-doped cladding, Panda type Polarization-maintaining, and Hollow core Photonic crystal fiber. An adaptive platform was developed and the appropriate recipe was identified for each fiber, in terms of both arc discharge parameters and setup arrangement, for manufacturing LPGs with strong and narrow attenuation bands, low insertion losses, and short length. As the fabricated devices have appealing features from the application point of view, the sensitivity characteristics towards changes in different external perturbations (i.e., surrounding refractive index, temperature, and strain) are investigated and compared, highlighting the effects of different fiber composition and structure.
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