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Updated: Aug 20, 2026

Real-Time, Two-Color Stimulated Raman Scattering Imaging of Mouse Brain for Tissue Diagnosis
Published on: February 1, 2022
Use of coherent control methods through scattering biological tissue to achieve functional imaging
Johanna M Dela Cruz1, Igor Pastirk, Matthew Comstock
1Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA.
Abstract:
We test whether coherent control methods based on ultrashort-pulse phase shaping can be applied when the laser light propagates through biological tissue. Our results demonstrate experimentally that the spectral-phase properties of shaped laser pulses optimized to achieve selective two-photon excitation survive as the laser pulses propagate through tissue. This observation is used to obtain functional images based on selective two-photon excitation of a pH-sensitive chromophore in a sample that is placed behind a slice of biological tissue. Our observation of coherent control through scattering tissue suggests possibilities in multiphoton-based imaging and photodynamic therapy.
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