高灵敏度多芯光纤加速度计用于低频振动传感
Highly sensitive multicore fiber accelerometer for low frequency vibration sensing
AI总结：
本文提出一种基于强耦合非对称多芯光纤的紧凑高灵敏度全光纤加速度计，在1 mHz至30 Hz及0.76至29.64 mg范围内线性响应，灵敏度达2.213 nW/mg，为低频振动传感提供低成本替代方案。
摘要：
我们报道了一种紧凑、高灵敏度的全光纤加速度计，适用于低频和低振幅振动传感。器件中的传感元件是两段强耦合的非对称多芯光纤（MCF），它们以180°相对角度熔接在一起。这些MCF段夹在标准单模光纤之间。器件的反射光谱呈现出窄谱，当受到振动时，其高度和波长位置会发生变化。加速度计的询问通过光谱仪和光电探测器进行，以同时测量波长漂移和光功率变化。该器件在从1 mHz到30 Hz的宽振动频率范围以及从0.76 mg到29.64 mg的加速度范围内进行了测试，表现出线性响应，灵敏度为2.213 nW/mg。因此，我们认为本文报道的加速度计可能成为现有电子和光学加速度计的替代方案，特别是在低频和低振幅振动场景下，这得益于其紧凑性、简单性、成本效益、易于实现和高灵敏度。
英文摘要：
We report on a compact, highly sensitive all-fiber accelerometer suitable for low frequency and low amplitude vibration sensing. The sensing elements in the device are two short segments of strongly coupled asymmetric multicore fiber (MCF) fusion spliced at 180° with respect to each other. Such segments of MCF are sandwiched between standard single mode fibers. The reflection spectrum of the device exhibits a narrow spectrum whose height and position in wavelength changes when it is subjected to vibrations. The interrogation of the accelerometer was carried out by a spectrometer and a photodetector to measure simultaneously wavelength shift and light power variations. The device was subjected to a wide range of vibration frequencies, from 1 mHz to 30 Hz, and accelerations from 0.76 mg to 29.64 mg, and performed linearly, with a sensitivity of 2.213 nW/mg. Therefore, we believe the accelerometer reported here may represent an alternative to existing electronic and optical accelerometers, especially for low frequency and amplitude vibrations, thanks to its compactness, simplicity, cost-effectiveness, implementation easiness and high sensitivity.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
