Field uniformity of electrode system with preionization structure for TEA CO₂ laser

The differences of electric field distribution produced by the variation of parameters in an asymmetric multielectrode system for high power gas lasers are studied. With the highprecision finite element method, the model of such complicated electrodes system is presented, and its electric field is calculated numerically. For a typical TEA CO2 laser with asymmetric electrodes and printed circuit board preionization structure, this method is applied to analyze electric field uniformity and uniform field range. The results suggest that a better distribution of electric field can be obtained by optimizing of structure parameters based on simulation, and lower cost for the electrodes configuration can be achieved at the same time. Stable operation at 200 Hz with an average output of 7 J per