Detection of Ultrasonic Mechanical Vibration of a Solid Using Fiber Bragg Grating
Detection of Ultrasonic Mechanical Vibration of a Solid Using Fiber Bragg Grating
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使用光纤布拉格光栅检测固体的超声机械振动
DOI：
10.1143/jjap.39.3134
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发表时间：
2000
影响因子：
1.5
通讯作者：
Sumio Takahashi
中科院分区：
文献类型：
--
作者：
N. Takahashi;Kazuto Yoshimura;Sumio Takahashi
基于光纤布拉格光栅（FBG）对激光强度的调制，实现了对机械振动的检测。该传感器输出稳定，谐波分量小。认为传感器工作是线性的。灵敏度取决于工作波长处FBG透射光谱曲线的斜率，斜率越陡，灵敏度越高。FBG不仅因其体积小、重量轻而对被测物的影响小，而且其频率特性被认为比PZT振动传感器更好，因此有望成为测量机械振动的重要实用工具。
Based on the intensity modulation of laser light propagating through a fiber Bragg grating (FBG) attached to a Pb(Zr, Ti)O3 (PZT) vibrator, the detection of mechanical vibration is demonstrated. The output of the sensor is stable and the involved harmonic component is small. It is considered that the sensor operation is linear. The sensitivity depends on the slope of the FBG transmission spectrum curve at the operating wavelength and is higher for a steeper slope. Since not only an FBG has little influence on the object being measured because of its smallness and light weight but also its frequency characteristics are thought to be better than those of a PZT vibration sensor, an FBG is expected to provide us with an important tool of practicality for measuring mechanical vibration.