Raman cross-section determination by direct stimulated Raman gain measurements

Abstract

The stimulated Raman gain of the Q branch of the first vibrational transition of atmospheric N₂ was measured with a nonfocused primary‐laser single‐pass amplifier configuration. The Raman signal which was amplified over a path of 8.53 m was provided by a near‐ir dye laser pumped by the ruby primary laser. The Raman cross section was determined from the measured gain.