提出了一种基于预应力的超低温漂光纤光栅封装方法并进行了实验测试, 通过分析光纤光栅的应力和温度交叉作用的原理, 结合硬铝材料和石英管材料不同的膨胀系数, 在光纤光栅上施加预应力的结构来解决光纤光栅温度补偿问题; 通过设计和制作含预应力的封装结构产生负温度效应的方法, 使封装的光纤光栅实现光纤光栅中心波长超低温度漂移。实验结果表明: 在温度为20~80℃的测试范围内, 这种封装结构可实现光纤光栅0.0002nm/℃的超低温度漂移, 而且具有良好的稳定性和一致性。

An ultra-low temperature drift fiber grating encapsulation method based on pre-stress had been proposed. By analyzing the principle of the stress and the temperature of fiber gratings, and taking advantage of the various expansion coefficients of hard aluminum materials and quartz tube materials, the pre-stress structure is designed to solve the problem related to the temperature compensation of fiber gratings. And in this way, the structure would generate the negative temperature effect to achieve the ultra-low temperature drift of the fiber gratings central wavelength. The experimental results show that this way of package can achieve 0.0002nm/℃ ultra-low temperature drift and has features of stability and consistency if the temperature ranges between 20℃ and 80℃.