Speckle-based measurement of the fractional azimuthal index of orbital angular momentum beams for refractive index sensing - Datasets for Figures 2 - 4

Datasets for Figures 2 - 4 of the manuscript: https://doi.org/10.48550/arXiv.2508.19521Each Figure folder has two sub-folders. One sub-folder contains the raw speckle images (separated into training images, and precision test measurements or biological measurements). The second sub-folder contains the analysed PCA outputs that appear in the graphs of the relevant figures.