Abstract:

 In the light of the physical circumstances of working of  a TEA CO₂ laser, taking beam divergence angle, mode volume, mode configuration and output power as design parameters, the authors designed  several groups of holophotes with different radii of curvature, output mirrors with different transmissivity and different general air pressure and partial air pressure of working\|laser material.   The  results indicate  that the TEA CO₂ laser could not only obtain a laser output up to several kilowatts, but also  control  beam divergence angle to be  a minimum   via optimizing parameters.

Key words: TEA CO₂ laser; , beam divergence angle, optical resonator