Kinetic model of an He–Ne–Ar–H2 laser pumped by hard ionising radiation

A kinetic model of an He–Ne–Ar–H₂ laser (λ = 585.3 nm) is developed taking into account the influence of nitrogen impurities. Small amounts of molecular nitrogen, at the level of traces in nominally pure gases, can have a significant influence on the output characteristics of the laser. It is shown that introduction of small amounts of hydrogen can lead to an improvement in the lasing characteristics when the pump power is increased.