Quantum Dots-Based Multiplexed Fiber-Optic Temperature Sensors

Quantum dots (QDs)-based multiplexed fiber-optic temperature sensors are proposed for multi-point sensing, which are composed of hollow-core microstructured optical fibers filled with aqueous QDs solutions of different fluorescent wavelengths. A parallel reflective configuration is adopted to avoid the crosstalk of fluorescent emissions, and to construct practical probes. Temperature experiments show that the fluorescent peak wavelength and the self-referenced intensity of two sensors both change with temperature linearly in the range from −10 °C to 120 °C with favorable reversibility. At last, the crosstalk of both the fluorescent peak wavelength and the self-referenced intensity of two sensors is tested for in the range of the temperature measurements.