The Effect of Linewidth on the Efficiency of Two-Photon-Pumped Frequency Converters.

摘要

The efficiency of two-photon-pumped frequency converters as a function of the pump laser detuning and linewidth, and of the linewidth of the selected nonallowed atomic transition is studied. The authors show that pressure broadening of the atomic transition is a key parameter in the design of these converters. A technique is developed to measure this linewidth as a function of either self- or foreign-gas broadening using a broad-band pump laser. Measurements of the linewidth of the 3s doublet-S-3d doublet-D transition of Na, and its device implications, are presented. (Author)