Pump Saturation in Optically Pumped FIR Lasers and Nonlinear Hanle Effect

Abstract

The infrared absorption increases in presence of static electric fields explains the enhancements observed in Satrk FIR molecular lasers. Measurements are performed for several transitions of FIR active molecules using a Stark optoacoustic technique. A simple theory is developed for the nonlinear Hanle effect which explains the experimental results.