Transmission and Detection of Light Diffraction Signal by Low-Frequency Ultrasonic Wave
Transmission and Detection of Light Diffraction Signal by Low-Frequency Ultrasonic Wave
复制标题
低频超声波光衍射信号的传输与检测
DOI：
10.1143/jjap.42.5821
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发表时间：
2003
影响因子：
1.5
通讯作者：
Y. Sonoda
中科院分区：
文献类型：
--
作者：
T. Sakoda;Y. Sonoda
利用可见激光束的光衍射效应测量水中低频超声波。这种激光束比超声波的波长要窄得多。检测信号的特性与基于夫琅和费衍射的理论预测相吻合。结果表明，通过保偏光纤传输的光衍射波可以被正确地检测。研究结果使我们能够构建一种新型的光纤传感器，将用于检测低频超声波以及光衍射信号的传输。
Measurement of low-frequency ultrasonic waves in water was examined by the light diffraction effect of a visible laser beam. This laser beam was much narrower than the ultrasonic wavelength. Characteristics of detected signals agreed well with the theoretical prediction based on Fraunhofer diffraction. As shown in the results, light diffraction waves transmitted through a polarization-maintaining fiber could be detected correctly. The results enable us to construct a novel optical fiber sensor which will be used for the detection of low-frequency ultrasonic waves as well as the transmission of light diffraction signals.