Highly birefringent fiber grating laser sensors based on femtosecond laser-inscribed in-fiber stressors

摘要

We propose a novel dual-polarization distributed feedback fiber laser (DFB-FL) sensor based on femtosecond laser-inscribed in-fiber stressors. Simultaneous strain and temperature measurement was demonstrated by detecting the polarization beat frequency and lasing wavelength of the DFB-FL. Experimental results exhibit strain sensitivities of 34.5 kHz/µε 1.25 pm/µε and temperature sensitivities of 684.6 kHz/°C 11.5 pm/°C respectively. © 2020 The Author(s)