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本文提出一种新的解调方法，在ＤＯＦＲＰＳ（分布光纤喇曼光子传感器）系统中采用Ｒａｙｌｅｉｇｈ散射ＯＴＤＲ（光学时域反射）曲线解调Ｒａｍａｎ散射ＯＴＤＲ曲线，提高了系统的测温灵敏度、测温精度，扩展了系统的功能，在２ｋｍ光纤上可实时测量１０００个点的温度、应力和压力；在系统中设置了光纤取样环，确定系统的修正系数，通过计算机进行实时修正，提高了测量稳定性，实验结果与理论分析一致，系统的测温精度达±１℃．
In this paper, a new demodulation method is proposed to demodulate the Raman scattering OTDR curve using the Rayleigh scattering OTDR curve in a DOFRPS (distributed optical fiber Raman photon sensor) system, which improves the sensitivity of the system to temperature measurement. The temperature measurement Accuracy, and expand the system’s functions. The temperature, stress and pressure of 1000 points can be measured in real time on 2km optical fiber. The optical fiber sampling loop is set in the system to determine the correction coefficient of the system, which can be corrected by the computer in real time to improve the measurement stability The experimental results are consistent with the theoretical analysis. The temperature measurement accuracy of the system is ± 1 ℃.