Effects of Doppler Broadening and Unequal Pump Intensities in Saturated Degenerate Four-Wave Mixing Spectroscopy

Abstract

Degenerate four-wave mixing (DFWM) is a technique that shows great promise for sensitive measurements of transient gas-phase species, and diagnostic applications of DFWM are being pursued actively at laboratories throughout the world. Applications of DFWM as a combustion diagnostic and as a tool for molecular spectroscopy are reviewed in a recent article by Farrow and Rakestraw (1992). However, significant questions remain regarding strategies for quantitative concentration measurements using DFWM.