基 于 超 高 灵 敏 度 压 电 单 晶 振 动 传 感 器 的光 学 平 台 微 弱 振 动 检 测

To address the limitations of commercially available vibration sensors—specifically，their insufficient sensitivity and excessive noise levels for detecting micro-vibrations—we developed an accelerometer utilizing PMN-PT piezoelectric single crystals with high piezoelectric coefficients. Experimental results demonstrate that the proposed sensor is capable of detecting weak vibrations with amplitudes below 0. 08 mrad at a frequency of 5 Hz. Under these measurement conditions，the signal-to-noise ratio（SNR）remains as high as 12. 5 dB，demonstrating its effective responsiveness to extremely weak vibrations. This study provides a novel approach for high-precision vibration detection in optical platform systems.