High-pressure tunable atomic gas lasers

A description is given of a high-pressure tunable gas laser emitting at λ = 0.91 μ. as a result of a transition in Ar I excited by an electric discharge. The emission frequency of this laser can be tuned by more than 35 GHz when the gas pressure is 4 atm and the line width is 0.7 GHz. Consideration is given to the possibility of using other high-pressure electric-discharge lasers as tunable sources of coherent radiation.