New laser catalytic technology

The catalytic technique in the sealed-off laser tube is very effective in extending the life of the laser. In the practical application case of the high-voltage excitation CO2 laser tube, the service life of the coated catalyst is not more than 3000 hours, and the service life of the coated catalyst laser tube is extended to more than 8000 hours.

The specific method and principle analysis of CO2 laser tube catalysis:

Taking a high-voltage excitation CO2 laser tube as an example, a catalyst is coated on the outer edge of the plasma (which may also be considered as the inner wall of the discharge tube).

Under the high-voltage electric excitation, the CO2 gas molecules in the discharge tube are continuously decomposed, and the CO2 dissociates into CO+O under the action of electron collision. Fortunately, this reaction process is reversible, and CO and O will combine to form CO2 after meeting. However, this kind of encounter compounding is not complete, because the probability of their encountering recombination is always less than the decomposition process of CO2. What is more serious is that the combination of uncomplexed oxygen atoms produces O2, and the reaction activation ability of O2 and CO is very high, and it is difficult to form CO2. The O2 molecule is very active and can generate oxides with other gas molecules in the device. Various oxides are fatal to CO2 lasers and can greatly reduce the output power of the laser. And when the oxide accumulates to a certain extent, it will generate an interlocking reaction, causing the laser to disappear within a few hours. It is popular to say that after a certain period of time, the power of the laser tube does not decrease linearly, and it is suddenly not emitted.

According to the above analysis, the core solution is to accelerate the recombination of CO2 and reduce the activation energy of the reaction. Then you have to use the catalyst. The specific method is to plate the catalyst on the edge of the plasma. The material of the catalyst can be classified into metals or rare earths. Metals include Pt, Au, Cu, etc., which can play a significant catalytic role. However, one of the disadvantages of metals is that they are all good conductors. The metal is directly plated in the discharge tube, and the current is directly transmitted through the membrane layer. It is not transmitted through the working gas, so the discharge excitation cannot be discussed. The solution to this problem is to apply a metal oxide to the inner wall of the discharge tube. This solves the discharge problem well and achieves the catalytic purpose. We are doing the knife template. It used to be the original laser tube on the machine. I used to know that the laser tube is 1600mm long. This kind of laser tube has 1200MM and 1400mm long. We change the 1400MM long power 130W cutting effect is not bad.

For more information about laser tubes and laser tubes of laser tube manufacturers of Shanghai Shanpu Laser Technology Co., Ltd., please contact Xiaobian.