Abstract
In this work, we report about the fabrication and characterization of a Long Period Grating (LPG) fabricated in a Panda type polarization-maintaining optical fiber, by the Electric Arc Discharge (EAD) technique. In particular, the investigation regards the resonant wavelength shift of three cladding modes as function of strain, temperature, and surrounding medium refractive index. We also investigate the variations of the sensing behavior upon the input polarization state. The results show that sensitivity of each resonant wavelength to environmental parameters is modulated by the cladding mode order and by polarization. These results represent a concrete perspective that this device can act as a three-parameter sensor.
© 2018 The Author(s)
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