The laser is made of a single source and is designed to induce a 4-wave mixing effect by the spectral focusing technique, to make Raman analysis be biocompatible through the Stimulated Raman microscopy. It allows the vibration frequency of interest to be modified very quickly, while conserving the efficiency.
Only one source instead of two:
Easy to tune :
Embeddable : it fits with mainstream microscopes (fiber laser)
Works with Stimulated Raman imaging and Nonlinear imaging (fluorescence, second harmonic)
Primary laser beam stays available