We have developed a coherent Raman imaging platform using broadband coherent anti-Stokes Raman scattering (BCARS) that provides an unprecedented combination of speed, sensitivity, and spectral breadth. The system utilizes a unique configuration of laser sources that probes the Raman spectrum over 3000 cm−1 and generates an especially strong response in the typically weak Raman fingerprint region through heterodyne amplification of the anti-Stokes photons with a large nonresonant background (NRB) while maintaining high spectral resolution of < 13 cm−1. For histology and pathology, this system shows promise in highlighting major tissue components in a non-destructive, label-free manner. We demonstrate high-speed chemical imaging in two- and three-dimensional views of healthy murine liver and pancreas tissues and interfaces between xenograft brain tumors and the surrounding healthy brain matter.
Citation: Nature Photonics
Pub Type: Journals
broadband coherent anti-Stokes Raman scattering, chemical imaging, coherent anti-Stokes Raman scattering, hyperspectral imaging, label-free