掺杂型荧光光纤温度传感技术

The Technique of Doped Optical Fiber Thermometer Based on Fluorescence Lifetime Measurement

用激光加热基座法生长出端部掺Cr3+的蓝宝石荧光光纤温度传感头,并设计制作了荧光光纤温度传感系统.该系统采用锁相相关检测方法,对呈指数衰减的荧光寿命进行测量,其测温范围为室温至450℃,分辨率为1℃.该系统具有抗电磁干扰、测温准确、分辨率高、动态响应好等优点,可以应用于生物医疗和变电站等场所的温度监控.

The sapphire fibre thermometer probe with doped Cr3+ ion tip end was produced by laser heated pedestal method, and a thermometer system based on its fluorescent decay was presented. A phase-locked detection method was used to check the fluorescence lifetime. Among the detection ranging from the room temperature to 450 ℃, the thermometer has an average temperature resolution of 1 ℃. The system had the advantages of high accuracy, very high temperature resolution, good dynamic response and immunity to the electro-magnetic interference. So it may be used in microwave treatment and thermal monitoring of medium voltage substations.