AI 中文总结
本文研发了一种采用双外差干涉读出的紧凑型低频光力学三轴惯性传感器，其X轴噪声达60皮克/√Hz，面内轴可分辨4毫赫兹至8赫兹地震信号，Z轴在轨性能与面内轴相当，验证了其在空间及地面应用的可行性。
AI 中文摘要
三轴光力学加速度计可替代静电传感器，适用于卫星大地测量、地震测量等场景，具备小型化、可地面测试的优势。本文展示了一种低尺寸、重量和功耗（CSWaP）的三轴传感器，采用整体熔石英谐振器与双外差干涉读出方案。X轴读出噪声基底达60皮克/√Hz，面内轴可分辨4毫赫兹至8赫兹范围内的环境地震地面运动，与共置商用地震仪结果一致；Z轴在1g负载下因重力诱导几何刚化（频率为44.45赫兹，0g等效配置下为11.07赫兹）噪声更高，测量表明其在轨性能与面内传感器相当。这些结果支持三轴光力学加速度计在空间任务及地面应用中的可行性。
英文摘要
Triaxial optomechanical accelerometers offer compact, ground-testable alternatives to electrostatic sensors for satellite geodesy, seismometry, and various other applications. We demonstrate a low-CSWaP triaxial sensor using monolithic fused-silica resonators with dual heterodyne interferometric readout. The X axis reaches a 60~pico-g/$\sqrt{\mathrm{Hz}}$ readout noise floor, and the in-plane axes resolve ambient seismic ground motion in agreement with a co-located commercial seismometer from 4~mHz to 8~Hz. The Z axis exhibits higher noise under $1g$ loading due to gravity-induced geometric stiffening (44.45~Hz versus 11.07~Hz in a 0g-equivalent configuration), with measurements indicating in-orbit performance on par with the in-plane sensors. These results support the feasibility of triaxial optomechanical accelerometry for space missions and ground-based applications.
Comments14 pages, 7 figures
