In the previous article, I have explained the various modes of carbon dioxide and about the significance of these modes in carbon dioxide laser. Today I will discuss the construction of carbon dioxide laser.
Carbon dioxide laser consists of a discharge tube having a diameter of 2.5cm and a length of about 5m. The discharge tube is filled with a mixture of carbon dioxide, nitrogen and helium gases in the ratio of 1:2:3 with water vapors. Pressures maintained are about P (for He)= 7 Torr, P (for N2)= 1.2 Torr and P (for CO2 = 0.33 Torr).