Optical fiber temperature measurement based on Cd Se/Zn S quantum dots

• Main Authors: Xiang, Shiyezi, Wan, Fu, Chen, Weigen, Zhang, Zhixian, Wang, Jianxin, Lei, Jiali
• Format: Conference Proceeding
• Language: English
• Subjects: Cd Se/Zn S quantum dot; finite element method; Fluorescence; optical fiber; Optical fiber sensors; Optical fibers; Quantum dots; Temperature; Temperature measurement; Temperature sensors
• ISSN: 2474-3852
• DOI: 10.1109/ICHVE49031.2020.9280078

High voltage electrical equipment temperature monitoring is an important work to ensure the safe and stable operation of the power system. Compared with traditional temperature sensors, quantum dot temperature sensors belong to optical fiber sensors, which have good electrical insulation and anti-interference. Besides, quantum dots are semiconductor-like materials, and their luminescence spectra have a temperature-varying effect. In this paper, a fluorescent temperature sensor based on Cd Se/Zn S quantum dot solution is studied. Based on the finite element method, the optical fiber structure containing Cd Se/Zn S quantum dots solution was designed. With finite element method, this paper analyzed its mode field distribution of the fundamental mode. The quantum dots solution with UV glue were pumped into the hollow-core fiber. After irradiation with a UV curing lamp to solidify the UV colloid, a temperature sensor was made. The temperature can be measured simultaneously according to optical parameters such as peak intensity, peak wavelength and half-peak width of the luminescence spectra of quantum dots. In the laboratory the temperature measuring platform of quantum dot fiber was built. The results showed that when the temperature increased, the peak intensity of fluorescence spectrum decreased, the peak wavelength increased, and the full width at half maximum increased.