为了提高电力电缆测温系统的测量精度和速度，提出了以光纤梳状滤波器代替参考光栅提供拟合数据参考点，采用最小二乘法拟合光纤Bragg光栅波长和F-P可调谐滤波器调谐电压的线性关系，通过F-P可调谐滤波器解调FBG传感器中心波长变化的方法，完成对电力电缆温度的测量.研究表明，光纤梳状滤波器能够代替多个恒温参考光栅实现波长标定，对反射波长的测量误差＜5 pm，温度均方误差≤0.7 ℃.

To improve the accuracy and speed of the online temperature measurement system for power cables, a method for fitting data reference points was proposed, which uses fiber interleaver filter to replace referencegrating. Least square method is utilized to fit linear dependency between bragg wavelength of fiber grating and tuning voltage of FabryPerot filter. With wavelength shift that is demodulated by the tunable FabryPerot filter, the system realizes temperature measurement of power cables. The result of the research shows that fiber interleaver filter can replace the referencegratings in thermostatic environment to calibrate the wavelength shift. Error of reflected wavelength is ±5pm, and mean square error of temperature is 0.7℃.