  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.
