In the earlier articles, I have explained the modes and construction of carbon dioxide laser. Today I will explain the working of the carbon dioxide laser.
Pumping of nitrogen molecules: As electric discharge is used as pumping source and when electric discharge is passed through the mixture of CO2, N2 and He, electrons are accelerated down the tube. These accelerated electrons collide with the N2 molecules and excite them to higher vibrational energy levels. Let us say the N2 excited from level F1 to F2.