Resolving power and sensitivity in modulation transfer stimulated resonantraman spectroscopy

We show that the lineshape and size of the detected signal in ultra-high-re solution stimulated Raman spectroscopy computed from a general expression o f the modulated signal are in good agreement with the experimental results. Using the theoretical expression of the signal, we analyze the resolving p ower and the sensitivity of our Raman spectrometer. We show that a second h armonic detection in high-frequency transfer modulation generates a linesha pe without modulation broadening. A 2.6-kHz-wide resonance has been obtaine d with iodine, mainly limited by both the transit time and collisions.