Laser Saturation Resonances in NH3Observed in the Time-Delayed Mode

Abstract

A time-delayed technique is used to study the decay of narrow laser saturation resonances induced in the ${\nu }_{2}asQ(8, 7)$ transition of N${\mathrm{H}}_3$. The experiments dramatically separate the distinct contributions to the line shape due to population saturation and Ramantype processes, and yield a value of 3.5±0.6 MHz/Torr for the excited-state population decay rate.