Pressure-Dependent Absorption in BCl3 at 10.6 μ

Abstract

The absorption of 26 lines of a CO₂ laser by BCl₃ has been measured over a wide range of pressures. At low pressures, saturation effects occurred for powers as low as 200 mW cm⁻². Above 1 Torr, the absorption coefficient is found to increase linearly with pressure. A theoretical model, taking the effects of saturation and line overlapping into account, has been formulated to interpret these results.