Journal
OPTICS EXPRESS
Volume 25, Issue 6, Pages 6122-6131Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.006122
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Funding
- National Science Foundation [1611513]
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1611513] Funding Source: National Science Foundation
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Focusing inside scattering media is a challenging task with a variety of applications in biomedicine. State of the art methods mostly require invasive feedback inside or behind the sample, limiting practical use. We present a technique for dynamic control and focusing inside scattering media that combines two powerful methods: optical coherence tomography (OCT) and wave-front shaping (WFS). We use OCT as a non-invasive feedback for WFS optimization of a separate, penetrating laser. Energy absorbed in the sample, creates thermal expansions that are used for the feedback mechanism. By maximizing thermal deformations within a selected focal region, we demonstrate enhanced focusing of light through scattering media beyond the ballistic regime and within the penetration range of OCT. (C) 2017 Optical Society of America
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