Lasing on the D-2 line of sodium in a helium atmosphere due to optical pumping on the D-1 line (up-conversion) - art. no. 033408

摘要

A method is proposed to produce population inversion on transitions involving the ground state of atoms. The method is realized experimentally with sodium atoms. Lasing at the frequency corresponding to the sodium D-2 line is achieved in the presence of pump radiation resonant to the D-1 line with helium as a buffer gas. [References: 9]