Two main repositories
OMLC – Oregan Medical Laser Center, Steve Jacques and Scott Prahl, (link)
UCL – Biomedical Optics Research Laboratory (BORL), Ilias Tachtsidis (link)
Links for main tissue chromophores
Hemoglobin
Water
Lipid
Collagene
Paola Taroni et al., Absorption of collagen: effects on the estimate of breast composition and related diagnostic implications, J. of Biomedical Optics, 12(1), 014021 (2007). https://doi.org/10.1117/1.2699170
Cytochrome