The given report is devoted to theoretical research of simultaneous lasing on two lines having common upper or lower level. It is shown that the competition can be two types: symbiosis (parallel lasing) and quenching. The competition by upper level is illustrated with simultaneous lasing on lines 724.5 and 703.2 nm of atom Ne in mixture Ne-Ar and lines 2.65 and 2.03 μm of atom Xe in mixture Ar-Xe. The competition by lower level is presented by lines 2.52 and 2.19 μm of atom Kr in mixture He-Ne-Kr and by lines 2.31 and 2.4 μm of atom Ar in mixture He-Ne-Ar.
Aleksey A. Pikulev,
"Competition of laser lines having upper or lower common level", Proc. SPIE 6263, Atomic and Molecular Pulsed Lasers VI, 62630I (31 May 2006); doi: 10.1117/12.677402; https://doi.org/10.1117/12.677402