We report the operation of a chalcogenide glass Raman fiber laser. To mitigate photoinduced effects and minimize impurity absorption, a $2051\mathrm{nm}$ ${\mathrm{Tm}}^{3+}$ -doped silica fiber laser was employed as the pump source. Vibrations between the polymerlike layers comprising the glass produced first Stokes emission at $2062\mathrm{nm}$ , an output power of $0.64\mathrm{W}$ , and a slope efficiency of $\sim 66\%$ . Bond bending and bond stretching vibrations within the layers simultaneously produced first Stokes output at $2102\mathrm{nm}$ $\left(0.2\mathrm{W}\right)$ and $2166\mathrm{nm}$ $\left(16\mathrm{mW}\right)$ , respectively. Second Stokes output at $2074\mathrm{nm}$ was produced when the fiber length was extended.

This paper presents an erbium-doped fiber laser temperature sensor, which is based on an intracavity fiber filter immersed in glycerol/water solutions. The sensing element is the intracavity fiber filter, consisting of a two-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 signal-to-noise ratio of 50 dB make the proposed sensor suitable for real applications.