The data format is a json file consisting of:

{
    "100": { # Ridge fabricated with 100 um kerf blades
        "pos": An array of X-positions along the waveguide ridge in mm
        "straightness": The deviation of the ridge midpoint at each position from a fitted straight line in nm
    },
    "300": { # Ridge fabricated with 300 um kerf blades
        "pos": An array of x-positions along the waveguide ridge in mm
        "straightness": The deviation of the ridge midpoint at each position from a fitted straight line in nm
    }
}
