Table 1. Estimated transmission (intersection point of fit with y-axis) without IL derived from the fits in Fig. 3 and comparison to the direct measurements of CT and TT for a water filled cuvette.

Wavelength in nm	450	632	808	980
Estimated transmission without IL	80 %	86 %	83 %	53 %
Measured transmission water (TT)	88 %	88 %	87 %	56 %
Measured transmission water (CT)	86 %	89 %	85 %	53 %