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对长周期光纤光栅（ＬＰＧ）的温度特性进行了实验研究，测得的温度灵敏系数为０．０８６ｎｍ／℃，为光纤布喇格光栅（ＦＢＧ）典型温度灵敏系数的８．２倍．以ＬＰＧ作为传感元件，以可调谐掺铒光纤环形腔激光器作为光源，研究了ＬＰＧ的强度型温度传感特性，在７４℃的温度变化范围内，激光透射光强的对数与待测温度的关系具有良好的线性和重复性，温度测量的分辨率可达０．１℃．
The temperature characteristics of long period fiber grating (LPG) were experimentally studied. The measured temperature sensitivity coefficient was 0.086nm / ℃, which was 8.2 times the typical temperature sensitivity coefficient of fiber Bragg grating (FBG). Using LPG as sensing element and tunable erbium-doped fiber ring laser as light source, the intensity-type temperature sensing characteristic of LPG was studied. The logarithm of the transmitted light intensity and the measured temperature The relationship between the good linearity and repeatability, temperature measurement resolution of up to 0.1 ℃.