With the development of the times, optical fiber laser cutting machine has been widely used to cut metal sheet metal. What are the characteristics of the laser of optical fiber laser cutting machine compared with other light sources? Let's take a look.
1. Good coherence. The light emitted by general light sources belongs to incoherent light and will not cause interference, while the laser in fiber laser cutting machine has good coherence. When the laser beams are stacked together, the gas amplitude is stable, and the phase relationship before and after the light wave can be kept unchanged for a long time, which is beyond the reach of other light sources;
2. Good monochromaticity. The light emitted by general light sources includes a wide wavelength range, that is, the spectral line width is wide. For example, sunlight includes all visible light wavelengths. The laser in the optical fiber laser cutting machine has a single wavelength, and the width of PUXian is extremely narrow, usually hundreds of nanometers to a few microns. Compared with the ordinary light source, the width of the ordinary line is narrower by an order of magnitude;
3. Good directivity. The light emitted by ordinary light sources radiates in all directions, which is far from directional. The speed of light is very divergent. However, the laser divergence angle in the optical fiber laser cutter is small, usually several millionths of a degree, with good directivity. If the laser beam is shot to the moon, the spot diameter on the moon surface will not exceed 2km, or even smaller.
These characteristics make the laser of fiber laser cutting machine more advantageous than other light sources.