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提出一种不受电光调制器传输曲线温度漂移现象影响的基于瑞利散射的单端布里渊光时域分析系统,并对系统所需的合成信号及温度特性进行分析,通过搭建单端布里渊光时域分析温度传感系统测量系统的温度特性。结果表明:通过测量布里渊增益谱获得的布里渊频移与温度呈良好的线性关系;由单端布里渊光时域分析温度测量系统获得的布里渊频移的温度系数为1.109MHz/℃,与传统双端布里渊光时域分析系统获得的1.20MHz/℃具有良好的一致性,在1.77km光纤上可实现9.5m空间分辨率的温度传感测量。
A single-ended Brillouin optical time-domain analysis system is proposed, which is not affected by the phenomenon of temperature drift in electro-optical modulator. The signal and temperature characteristics of the system are analyzed. The temperature characteristics of the system of measurement system of the temperature sensing system in the Riehenian optical time - domain analysis. The results show that the Brillouin frequency shift obtained by measuring the Brillouin gain spectrum shows a good linear relationship with temperature. The temperature coefficient of Brillouin frequency shift obtained from the temperature measurement system of single-end Brillouin optical time-domain analysis is 1.109 MHz / ° C, which is in good agreement with the 1.20MHz / ° C obtained by the traditional double-edge Brillouin optical time-domain analysis system. It can achieve 9.5m spatial resolution temperature sensing measurement on 1.77km optical fiber.