Standoff chemical detection using single-beam CARS

Coherent anti-Stokes Raman scattering (CARS) typically involves the interaction of the material with three (pump, Stokes, and probe) laser beams. Recently developed by the Silberberg group [1], single-beam CARS takes all pump-Stokes-probe fields from one ultra-broad bandwidth laser source and removes the complexities involved when using several laser pulses and has become increasingly popular in biomedical imaging.