A sensor for dual-parameter sensing of strain and temperature by dual fiber Bragg gratings (FBGs) structure was proposed and demonstrated. The structure with a traditional FBG (FBG-1) and a strain-assisted FBG (FBG-2) and were fabricated by femtosecond laser phase mask technology. The sensor has shown a positive wavelength sensitivity in temperature and strain, whose are 11.39 pm/°C and 0.5824 pm/με for FBG-1, and 11.34 pm/°C and 0.5831 pm/με for FBG-2, respectively. Meanwhile, the reflection intensities of two FBGs have exhibited a linear change in strain, and a sensitivity of 1.7275×10-4 dB/με and -2.018×10-4 dB/με are achieved. Moreover, the sensor has merits of simple fabrication, compact size and high reflectivity, which has shown a good prospect in multi-parameter sensing fields.
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