为了消除由法布里-珀罗标准具的干涉峰偏移引起的光纤布喇格光栅波长解调误差，采用多参考光栅进行法布里-珀罗标准具波长校准，搭建了相应的光纤布喇格光栅解调平台.将待解调光栅、法布里-珀罗标准具和多个参考光栅分别接入采样通道，用多个参考光栅对法布里-珀罗标准具进行波长校准，得到准确度较高的标准具干涉峰波长，再以此波长计算待测光栅波长，降低了校准误差.实验结果表明，利用该方法搭建的光纤布喇格光栅解调系统校准的重复性误差小于1.6 pm，波长解调误差低于1.8 pm.

In order to eliminate the fiber Bragg grating demodulation error caused by the interference peak shifting of Fabry-Perot etalon, a method was proposed that multi-gratings were utilized to calibrate the wavelength of Fabry-Perot etalon, and a demodulation platform was established. Sampling channels were respectively connected with sensor gratings, Fabry-Perot etalon and reference gratings, and interference peak wavelengths with high precision were calibrated using multi-reference-gratings. Then wavelengths of sensor gratings were calculated using these wavelengths, and calibration error was reduced. The experiment demonstrates that the repeatability error of the fiber Bragg grating demodulation system is less than 1.6 pm, and the wavelength demodulated error is under than 1.8 pm.