• Accepted Paper

Correlation revival eigenmodes for differential sensitivity in speckle metrology

Hal Gee, Morgan Facchin, and Graham D. Bruce

Phys. Rev. A - Accepted 25 September, 2026

DOI: https://doi.org/10.1103/jl5y-q2q2

Abstract

Speckle metrology exploits the high sensitivity of scattered fields to parameters of interest, yet this also leaves measurements vulnerable to unintended perturbations. Here we employ transmission matrix formalism to engineer light fields that produce speckle correlation “revivals”, selectively reducing response to chosen parameters. In a multimode fiber scattering system, we first achieve a 40× suppression of bending-induced correlation changes over a limited curvature range, without significantly reducing wavelength sensitivity. We then demonstrate that this approach generalizes easily from one nuisance parameter to two by introducing a polarization-translation perturbation in addition to bending. This methodology opens a route to tailored, parameter-specific sensitivities of speckle-based measurements.

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