Theoretical treatment of RF discharges in coaxial He–Ne laser

Based on the ambi-polar diffusion, a model to simulate the coaxial RF-excited He–Ne laser plasmas is set up, and the microprocesses in laser plasmas are studied. Some parameters such as the spatial distribution of electron density, RF electric field, RF power density and excitation efficiency for upper laser level are calculated and discussed, which are suitable to describe the electrical properties of the discharges. The theoretical results can explain some experimental phenomena and guide the experimental study.