一种双折射平衡型光纤温度传感器的研究  

Study of A Birefringence Balance Optical Fiber Sensor

作　　者：吕玲[1] 董胜龙[1] 黄登山[1] 

机构地区：[1]西北工业大学电子工程系

出　　处：《激光与红外》1999年第2期107-110,共4页Laser & Infrared

摘　　要：提出了一种双折射平衡型光纤高温传感系统。这种系统是通过检测光偏振态的变化来测量温度特性的。用两块蓝宝石单晶片作为探头中的敏感元件，它们首尾相接，第一块晶体的慢轴与第二块晶体的快轴相连。两块晶体的双折射相互平衡，提高了传感器的灵敏度和准确性，温度的测量范围可达２０００℃以上。精度可达０．３５％，这种系统可广泛用于航空发动机进口温度测量。本文从物理模型和数学分析上证实了这种传感器的可行性。并通过计算机仿真结果对系统进行了验证。A birefringence balance polarimetric optical fiber temperature sensor is proposed and demonstrated. The system measure the character of temperation by test polarization state. Two singlecrystal sapphire flat serves as the sensing element, which can withstand temperatures over 2000℃. Two single crystal sapphire crystals are incorporated into the sensor head. They are connected end to end in such a way that the slow axis of the first crystal is aligned with the fast axis of the second crystal,by computer simulation, accurancity of the system up to 0.35%.

关 键 词：光纤温度传感器 偏振特性 双折射 平衡型 

分 类 号：TN253[电子电信—物理电子学] TP212[自动化与计算机技术—检测技术与自动化装置]