Optomechanical reference accelerometer

TL;DR

This paper introduces an optomechanical accelerometer with high dynamic range, bandwidth, and low noise, suitable for calibration and navigation, supported by experimental data and a detailed physical model.

Contribution

It presents a novel, low-cost, portable optomechanical accelerometer with comprehensive modeling and experimental validation of its performance and limitations.

Findings

Achieved noise level below 8 μg/√Hz

Demonstrated bias stability and scale factor accuracy in a portable prototype

Provided a detailed model of device physics and noise sources

Abstract

We present an optomechanical accelerometer with high dynamic range, high bandwidth and read-out noise levels below 8 ${\mu}$g/$\sqrt{\mathrm{Hz}}$. The straightforward assembly and low cost of our device make it a prime candidate for on-site reference calibrations and autonomous navigation. We present experimental data taken with a vacuum sealed, portable prototype and deduce the achieved bias stability and scale factor accuracy. Additionally, we present a comprehensive model of the device physics that we use to analyze the fundamental noise sources and accuracy limitations of such devices.