Background-free 3D chemical imaging based on polarization coherent Raman holography

Opt Lett. 2015 May 1;40(9):2095-8. doi: 10.1364/OL.40.002095.

Abstract

We report on a holographic coherent anti-Stokes Raman scattering imaging by using polarization discrimination for nonresonant background suppression. With reduced polarization scrambling effect under weakly focused excitation, nonresonant background-free coherent Raman imaging is demonstrated. A fast chemically selective imaging is achieved in a three-dimensional volume of 70 μm ×70 μm ×100 μm in 2 s.