研制出一种具有微结构缺陷的新型光纤光栅，并对其温度特性进行了实验研究。该光栅是利用不同浓度的氢氟酸溶液对光纤布拉格光栅进行选择性刻蚀得到的，刻蚀区域改变了光纤的局部有效折射率，引入附加相移从而形成两个谐振峰。实验研究结果表明该新型光栅具有不同的温度灵敏系数，在20 ℃～90 ℃的温度范围内，随温度升高两谐振峰波长分别向长波方向移动了0.8127 nm和0.7329 nm，其温度灵敏系数分别为0.01161 nm/℃和0.01047 nm/℃，线性拟合度分别为0.991和0.998，新型光纤光栅两谐振峰随温度的变化呈现良好的线性关系。

A novel fiber Bragg grating with micro-structured defect is proposed and demonstrated. Its temperature characteristics are studied experimentally. It was obtained by wet chemical etching part of fiber Bragg grating in different concentrations of hydrofluoric acid solutions. The change of the local effective refractive index in the etched area induces two resonant peaks. Experimental results show that the two resonant peaks have different temperature sensitive coefficients. The wavelengths of the two resonant peaks become 0.8127 nm and 0.7329 nm longer while the temperature increases from 20 ℃ to 90 ℃, and the temperature sensitive coefficients are 0.01161 nm/℃ and 0.01047 nm/℃ respectively. The fitting linearity is 0.991 and 0.998 respectively. So the two resonant peaks of novel fiber grating present good linear relationship with temperature.