通过改进非本征法布里-珀罗干涉型光纤传感器结构实现温度补偿的新方法（英文）

A New Temperature Compensation Method by Optimizing the Structure of Extrinsic Fabry-Perot Interferometric Optical Fiber Sensor

针对非本征法布里珀罗干涉型(EFPI)光纤传感器外毛细管热胀冷缩引起的温度敏感问题,提出了通过在毛细管内部反射光纤表面镀温度补偿膜(实验中使用铜膜)来降低温度影响的方法,并推导了相关的数学模型,进行了实验研究。实验结果证明了该温度补偿方法的有效性和可控性。实验中,铜膜的轴向长度和补偿系数表现出了良好的线性关系,1mm轴向长度的铜膜温度补偿系数达到了0.49nm/℃。

For the problem of the change of capillary tube induced by thermal expansion and contraction with temperature change, a new temperature compensation method applied in extrinsic Fabry-Perot interferometric （EFPI） optical fiber sensor is proposed. Temperature compensation film （copper film in this paper） is deposited on the reflective fiber within silica tube to compensate the gap change caused by temperature variation. The experimental results prove the effectiveness of this method and a linear relationship between axial length of copper film and temperature compensation length is found. In experiment, the temperature compensation coefficient of 1 mm axial length copper film reaches 0.49 nm/℃.