%0 Book Section %T Beam quality of TEA CO_2 laser pulses: Influence of the gas mixture and of intracavity apertures publisher SPIE--The International Society for Optical Engineering %D 1996 %U 0-8194-2267-3 %@ https://hdl.handle.net/20.500.14352/60735 %X We investigate from both a theoretical and an experimental point of view the dependence of the spatial parameters (integrated along the pulse length) of TEA CO_2 laser pulses on the presence of nitrogen in the gas mixture and also on the size of an intracavity diaphragm used to attenuate higher-order modes. %~