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1光纤维传感器1.1诱导布里渊散射光机光纤维内产生的布里渊散射光与入射光之间的频率差(布里渊频移)已知与变形存在有依存关系。如光纤维入射的为脉冲光,反射的布里渊散射光,其返还时间位置,还有散射光频率位置的变形,可分别进行检测(图1a)。这种方式即称BOTOR法(布里渊光时域反射法),已用于河川与斜面进行遥控检测。可沿光纤维连续变形变化分布进行检测实
1 Optical Fiber Sensor 1.1 Induced Brillouin Scattering The frequency difference (Brillouin frequency shift) between the Brillouin scattered light and the incident light generated in the optical fiber is known to be dependent on the deformation. Such as the incident optical fiber pulsed light, the reflected Brillouin scattered light, the return time position, as well as scattered light frequency position of the deformation can be detected separately (Figure 1a). This method is called BOTOR method (Brillouin optical time-domain reflectometry), has been used for remote detection of rivers and slopes. Can be continuously deformed along the optical fiber distribution changes to detect real