High Sensitivity Fiber Laser Temperature Sensor


This paper presents an erbium-doped fiber laser temperature sensor, that is predicated on an intracavity fiber filter immersed in glycerol/water solutions. The sensing component is the intracavity fiber filter, consisting of a 2-taper fiber Mach-Zehnder interferometer (MZFI). The high refractive index dispersion of glycerol/water solutions with temperature allowed the modification of the MZFI spectral characteristics and hence determines the lasing wavelength. The sensitivity of 1089 pm/°C and a symptom-to-noise ratio of fifty dB build the proposed sensor suitable for real applications.

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