Until now, spatially resolved Raman Spectroscopy has required to scan a sample under investigation in a time-consuming step-by-step procedure. Here, we present a technique that allows the capture of an entire Raman image with only one single exposure. The Raman scattering arising from the sample was collected with a fiber-coupled high-performance astronomy spectrograph. The probe head consisting of an array of 20 × 20 multimode fibers was linked to the camera port of a microscope. To demonstrate the high potential of this new concept, Raman images of reference samples were recorded. Entire chemical maps were received without the need for a scanning procedure.
Schmälzlin, E., Moralejo, B., Rutowska, M., Monreal-Ibero, A., Sandin, C., Tarcea, N., … Roth, M. M. (2014). Raman imaging with a fiber-coupled multichannel spectrograph. Sensors (Switzerland), 14(11), 21968–21980. https://doi.org/10.3390/s141121968