Generation and application of multicolor laser light generated via stimulated Raman scattering in gases

Abstract

Stimulated Raman scattering is a nonlinear optical phenomena. An incident laser beam on a Raman-active medium is inelastically scattered producing multicolor laser light with lower and higher frequency components compared to the excitation source. The inherent spatial and temporal overlap of the laser light from a Raman shifter is ideal for multicolor and multiphoton interactions. In our Laboratory, we designed and constructed a Raman shifter that can operate with hydrogen, nitrogen or methane gas. The device is used for two-color two-photon fluorescence and optical beam induced current excitation. Other applications of the Raman shifter are pulsed full-color (RGB) digital holography and transfer of image from one wavelength to another.