Gaseous N2O3 as a possible active medium of a photorecombination laser

A theoretical analysis is made of the possibility of generation in the gaseous phase of considerable steady-state concentrations of nitrogen trioxide clusters which might be used as the active medium of a photorecombination laser. The optimal conditions (temperature, pressure, initial composition) are found for a photoinitiated N₂O₃ laser of this kind. The optical properties of this active medium, extinction coefficient of the pump radiation, and transparency in the probable stimulated emission range are considered. An estimate of the gain is obtained.