Inverse Raman effect: A quantitative spectroscopic technique

The inverse Raman effect extends the general applicability of Raman spectroscopy to unstable species, fluorescing compounds and low pressure gases. A critical examination of the theory leads to optimization of the experimental variables. Interference effects from two-photon absorption processes are discussed. An experimental apparatus based on a giant-pulse ruby laser and a broad-band laser-pumped dye laser is described. Experimental correlations with ordinary Raman scattering cross sections are presented. The effects of inhomogeneous laser beams on the measurements are examined.