Laser therapy theory:

CO2 laser divergence angle is very small, high energy density. It can output several kilowatts per square centimeter power after focusing. It can be used for medical tumor tissue vaporization, burning or cutting tissue lesions. So CO2 Laser therapy instrument is also called laser knife.

The original lesion tissue without focusing the beam irradiation can produce coagulation. CO2 laser is the wavelength of infrared light 10.6um penetrate deeper tissue, after irradiation beam expander, capable of deep tissue heating treatments.