Modeling the Thermomechanical Processes in the Output Window of a High-Power СО_2 Laser

摘要

A mathematical model of thermomechanical processes in the output window of a high-power continuous gas laser is developed and used to examine the windows of 0a СО_2 laser. The dependence of the maximum allowed output radiation power on the beam diameter and the distributions of temperatures and mechanical stresses are obtained, and the divergence of radiation is studied for windows made from ZnSe, KCl, and polycrystalline diamond (PD). In addition, the damage threshold of a composite output window made from PD with a single-crystalline region at the center is considered.