LASER-INDUCED GRATING SPECTROSCOPY

A description of four-wave mixing spectroscopy in terms of laser-induc ed gratings is developed, and recent applications of degenerate four-w ave mixing spectroscopy to combustion diagnostics are described. Two-c olour variants of the technique are also discussed particularly with r espect to the development of background-free stimulated emission pumpi ng experiments and novel methods for measuring translational anisotrop ies of photofragments. Recent theoretical progress in the understandin g of four-wave mixing line profiles is also described.