Quantum-Dot-Based Optical Fiber Temperature Sensor Fabricated by Two-Photon Polymerization

Abstract

Temperature is a common and significant physical quantity, particularly under harsh conditions such as a high voltage or strong electric/magnetic fields. In this study, we developed an all-fiber-optic temperature sensor based on a fiber-end microstructure doped with quantum dots (QDs). The microstructure was fabricated on a fiber tip using two-photon polymerization technology. The results show that the fluorescence intensity of the QD microstructure is reduced with an increase in temperature, and the peak position of photoluminescence exhibits a linear change in the temperature range of 26?70 ℃. The developed sensor exhibits a high-temperature sensitivity of 135 pm/℃. The proposed method has enormous potential for the development of fiber-end temperature sensors.