Pointing to the FBG current sensor based on GMM,the influence of temperature on each part of the sensor head and on the whole sensor head are analyzed.The temperature characteristics of the FBG,Fe-Ga GMM rod and the sensor head are tested by experimenL The experi- ment shows that the temperature characteristic of the Fe-Ga GMM rod is linear,but that of the Fe-Ga GMM and the sensor head as a whole is nonlinear.The Fe-Ga GMM rod is more sensitive to temperature than FBG,and the temperature characteristics of ...