A compact low-frequency optomechanical triaxial inertial sensor
Daniel George, Jose D. Hernandez Rivero, Moritz Mehmet, Ramses Miranda Espino, Xiangyu Guo, Andrea Nelson, Jose Sanjuan, Felipe Guzman
Abstract
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/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.
Create a lesson
Related papers
Correlation geometry and topology of structured optical beams
Jyrki Laatikainen, Olga Korotkova
Dual-comb generated in single thin-film lithium niobate microrings
Renhong Gao, Qifeng Hou, Xinzhi Zheng et al.
350-GHz-Band 4 by 4 RTD Monostatic Radar Array for Sequential Multidirectional Ranging
Li Yi, Ryoma Nakamura, Shota Ito et al.
Multi-contrast wide-field mid-infrared photothermal imaging
Anooj Thayyil Raveendran, Cornelia Reuter, Samir F. El-Mashtoly et al.
Topological photonic cavities based on dissimilar Bragg gratings
Alejandro Sánchez-Sánchez, José Manuel Luque-González, Gauthier Krizman et al.
Wavelength-Multiplexed Nonlinear Computing with a Single-Layer Diffractive Optical Processor
Yongkang Cheng, Che-Yung Shen, Yuntian Wang et al.