对带有聚合物涂敷层和缓冲层的光纤应变传感器的力学特性进行了研究，建立了双涂层光纤与基体材料相互作用的线弹性理论模型．理论研究表明：在小半径近似条件下，双涂层光纤的力学传递特性决定于涂覆层和缓冲层的弹性模量的相对值；当缓冲层的弹性模量远大于涂覆层时，其作用可忽略．实验中，将光纤传感器埋入基体材料内部，利用白光干涉应变测量方法，对平均应变传递系数进行了实验研究．实验结果与理论仿真具有较好的一致性．

The mechanical transfer characteristics of single mode quartz fiber optic sensor with double coating is studied. The theoretical model of linear elasticity between quartz fiber optic with double polymer cladding coating and buffer are presented. The theoretical results demonstrates that the mechanical transfer characteristics of double coating depend on the relative magnitude of elastic modulus between cladding and buffer under the small radius approximation compared with the model of single coating. When the elastic modulus of buffer is much bigger than that of cladding,its action can be neglected. In the experiment,the experimental study on the average transfer coefficient of different scale fiber optic sensors embedded in the matrix material has been carried out based on white light interference method and the result of experiment accords well with that of theory.