A good laser should have the ideal mode, stable power and other elements.
Incentive model. Carbon dioxide lasers use electrodes to excite carbon dioxide gas to produce lasers. According to the installation position of the metal electrode, it can be divided into direct current excitation and radio frequency excitation. Beam divergence angle. Strictly speaking, the beam divergence angle is not part of the content of the laser, but because the laser mode has a great influence on the far-field divergence angle, we will discuss it here. The influence of the beam divergence angle on the cutting quality is reflected in the width and slope of the incision. The smaller the divergence angle, the narrower the incision width, the smaller the slope, and the higher the quality.
Laser frequency. The laser output is divided into pulse output and continuous output. The Laser pointer used for cutting and welding mainly adopts the pulse output method. The pulse frequency mainly affects the cutting speed and the roughness of the incision. To obtain high-speed cutting, high frequency is essential. At present, the frequency of carbon dioxide lasers produced by most manufacturers is within 5000 Hz. Laser mode. It is one of the most important indicators to measure laser quality. It can be divided into single mode, base mode and multimode. The fundamental mode is the TEM00 mode, and its exponents on the X and Y axes are both 0, so it is an ideal dot. The laser with TEM00 mode can obtain the smallest beam diameter, and the smallest slit and faster cutting speed in the cutting process due to its small spot. The multi-mode has a non-zero index in the XY direction, and its beam quality is poor. Generally, it is only used for welding and not for cutting.