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CO2 Laser Excitation Process
- May 21, 2018 -

In the CO2 laser, the main working substance consists of three gases: CO2, nitrogen, and helium. Among them, CO2 is a gas that generates laser radiation, and nitrogen and helium are auxiliary gases. The addition of helium can accelerate the thermal relaxation process at the 010 level, thus facilitating the evacuation of the laser levels 100 and 020. The addition of nitrogen mainly plays a role in energy transfer in the CO2 laser, which plays a powerful role in the accumulation of energy level particles on the CO2 laser and high-power and high-efficiency laser output. CO2 molecule laser transition energy level diagram CO2 laser excitation conditions: In the discharge tube, usually input tens of mA or several hundred mA of DC current. During discharge, the nitrogen molecules in the gas mixture in the discharge tube are excited by the impact of electrons. At this time, the excited nitrogen molecules collide with the CO2 molecule. The N2 molecule transfers its own energy to the CO2 molecule. The CO2 molecule transitions from a low energy level to a high energy level to form a population inversion and emit a laser.