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RESEARCH PRODUCT
Sensitivity optimization with cladding-etched long period fiber gratings at the dispersion turning point
Ignacio R. MatiasJose Luis CruzJesus M. CorresAbian B. SocorroIgnacio Del Villarsubject
All-silica fiberMaterials sciencebusiness.industry010401 analytical chemistryFiber optics sensorsLong-period fiber gratingCladding (fiber optics)01 natural sciencesGraded-index fiberAtomic and Molecular Physics and Optics0104 chemical sciencesFibers single-mode010309 opticsOpticsDouble-clad fiberNormalized frequency (fiber optics)Fiber Bragg grating0103 physical sciencesFiber Bragg gratingsDispersion-shifted fiberbusinessdescription
This work presents a refractive index sensor based on a long period fiber grating (LPFG) made in a reduced cladding fiber whose low order cladding modes have the turning point at large wavelengths. The combination of these parameters results in an improved sensitivity of 8734 nm/refractive index unit (RIU) for the LP0,3 mode in the 1400-1650 wavelength range. This value is similar to that obtained with thin-film coated LPFGs, which permits to avoid the coating deposition step. The numerical simulations are in agreement with the experimental results. This work was supported in part by the Spanish Ministry of Education and Science-FEDER TEC2013-43679-R. J.L. Cruz also acknowledges financial support of project TEC2013-46643-C2-1-R, and the Generalitat Valenciana project PROMETEOII/2014/072.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-01-01 | Optics Express |