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We report on a direct comparison between Ti:Sapphire and Yb fiber lasers for depth-resolved label-free multimodal imaging of human skin. We found that the penetration depth achieved with the Yb laser was 80% greater than for the Ti:Sapphire. Third harmonic generation (THG) imaging with Yb laser excitation provides additional information about skin structure. Our results indicate the potential of fiber-based laser systems for moving into clinical use.
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Mihaela Balu, Ilyas Saytashev, Jue Hou, Marcos Dantus, Bruce J. Tromberg, "Comparing Yb-fiber and Ti:Sapphire lasers for depth resolved imaging of human skin (Conference Presentation)," Proc. SPIE 9689, Photonic Therapeutics and Diagnostics XII, 96890X (27 April 2016); https://doi.org/10.1117/12.2213352