Principle of CO2 laser generator for fiber laser cutting machine

Fiber laser cutting machine CO2 laser generator principle CO2 laser used its wavelength of 10.6pm in 1964. Because this is a very efficient laser with a conversion efficiency of 10% as a commercial model, CO2 lasers are widely used in laser cutting, welding, drilling and surface treatment. As a commercial application laser up to 45 kilowatts, this is the current strong material processing laser. The carbon dioxide laser is a molecular laser. The main substance is the carbon dioxide molecule. It can express a variety of energy states, depending on the open state of its vibration and rotation. The mixed gas in carbon dioxide is a plasma (plasma) formed by a low-pressure gas (usually 30-50 Torr) caused by the release of electrons. As Maxwell Boltzmann's law of distribution says, in plasma, molecules exhibit a variety of excited states. Some will present a high-energy state (00o1) which appears as an asymmetric swing state.

When the fiber laser cutting machine collides with the hollow wall or emits naturally, this molecule will also accidentally lose energy. Through natural emission, this high-energy state will drop to a symmetrical swing form (10o0) and emit photons (a light beam with a wavelength of 10.6pm) that may propagate in any direction. Occasionally, one of these photons will propagate down the cavity of the optical axis and will swing in the resonance mirror. In general, the working substance of a carbon dioxide laser is a mixture of carbon dioxide, helium, and nitrogen. Nitrogen acts as a buffer gas and its molecules resonantly transfer stimulating energy to carbon dioxide molecules. Because the relaxation level (01110) is the bottleneck, the role of ammonia is to transfer energy to the level (01110) to helium atoms as a heat sink. CO2 laser is a relatively important gas laser. This is because it has some prominent advantages: it has relatively large power and relatively high energy conversion efficiency.