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首页> 外文期刊>Sensors Journal, IEEE >Polarization-Interference-Based Fiber Vibration Sensor Incorporating Polarization-Diversity Loop Structure
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Polarization-Interference-Based Fiber Vibration Sensor Incorporating Polarization-Diversity Loop Structure

机译:结合偏振分集环结构的基于偏振干涉的光纤振动传感器

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摘要

We demonstrate a polarization-interference-based fiber vibration sensor by incorporating a Sagnac interferometer based on a polarization-diversity loop structure composed of a polarization beam splitter, polarization-maintaining photonic crystal fiber, and polarization controllers. A laser diode and a photodetector were used to implement a high-speed intensity-based sensor. By using a piezoelectric transducer, we performed single frequency vibration measurement over 1–3000 Hz, resulting in a cutoff frequency of Hz, a phase shift per unit length and unit strain of mrad/(), and a minimum detectable strain perturbation of /Hz at 2000 Hz. Naturally, damped vibration response was also investigated using a metal cantilever, and the relationship between the sensor output and applied impulse was analyzed.
机译:我们通过结合Sagnac干涉仪演示基于偏振干涉的光纤振动传感器,该Sagnac干涉仪基于由偏振分束器,保持偏振光子晶体光纤和偏振控制器组成的偏振分集环结构。激光二极管和光电检测器用于实现基于高速强度的传感器。通过使用压电换能器,我们进行了1-3000 Hz的单频振动测量,得到的截止频率为Hz,单位长度的相移和mrad /()的单位应变,以及最小可检测的应变扰动为/ Hz。在2000 Hz自然地,还使用金属悬臂研究了阻尼振动响应,并分析了传感器输出和施加的脉冲之间的关系。

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