Transfer function asymmetry in Fabry-P\'erot based optical pressure sensors

TL;DR

This paper investigates the asymmetry in transfer functions of Fabry-Pérot based optical pressure sensors, analyzing how system parameters affect sensitivity and proposing methods for accurate measurement in practical settings.

Contribution

It provides a detailed analysis of transfer function asymmetry origins and its impact on sensor sensitivity, offering improved estimation techniques for real-world applications.

Findings

Transfer function asymmetry affects measurement sensitivity.

System parameters like beam diameter influence transfer function shape.

Methods for accurate pressure sensitivity estimation are proposed.

Abstract

Optical resonators are one of the most promising optical devices for manufacturing high-performance pressure sensors for photoacoustic imaging. Among these, Fabry-P\'erot (FP) based pressure sensors have been successfully used for a multitude of applications. However, critical performance aspects of FP based pressure sensors have not been extensively studied, including the effects system parameters such as beam diameter and cavity misalignment have on transfer function shape. Here, we discuss the possible origins of the transfer function asymmetry, the impact it has on measurement sensitivity as well as ways to correctly estimate the FP pressure sensitivity under practical experimental conditions.