Correlation between Far-Infrared Laser Oscillations in Deuterium Oxide Vapor

Abstract

It is observed that the tuning curves of some pulsed laser oscillations with D₂O molecules are subject to a remarkable periodic modulation in the presence of interaction with other simultaneous laser oscillations. Cascade or competitive correlations are found in the following pairs of laser lines: 33.90 and 74.49 μm, 35.07 and 73.31 μm, 36.31 and 71.95 μm, 61.20 and 71.95 μm, 61.20 and 56.82 μm, 72.20 and 218.5 μm and 73.31 and 84.27 μm. Some characteristics relating to a coupled laser transition are discussed.