What are the characteristics of the fiber laser marking machine laser?

Laser light is produced by artificially using a specific substance with strong energy such as light or electric discharge. Compared with natural light, laser has many advantages: monochromaticity, the spectral amplitude is very narrow; directionality, the beam divergence is small; coherence, mutual interference phenomenon can occur; controllability, the output light is relatively easy to modulate. Compared with natural light, the laser has very high power, good monochromaticity and directivity, so the laser beam can be focused to the diffraction limit through a lens, thereby increasing the energy density.
       The fiber laser marking machine is the most widely used machine on the market, and the most important component in the fiber laser marking machine is the fiber laser. So what are the characteristics of the fiber laser?
       1. Small and lightweight. Optical fibers can be bent, so they can be small and lightweight. In addition, the laser head can be made very small, and the system can be updated with flexibility. Therefore, the purchase cost of the device can be reduced, and the installation site can be determined more flexibly.
       2. No maintenance required. With the increase in power of bulk solid-state lasers, the beam quality is greatly reduced due to significant thermal effects such as thermal lensing and thermally induced birefringence. For this reason, the cooling method must be carefully designed when developing bulk solid-state lasers. On the other hand, the cooling method of fiber lasers can be air-cooled within 100W. This is because the ratio of the surface area of the fiber as the laser medium is more than 4 orders of magnitude larger than that of the rod-shaped medium of the bulk solid-state laser, and it has excellent heat dissipation. .
       3. Excellent beam quality. The NA of the laser light emitted from the optical fiber is small and easy to focus. As a result, high power density can be achieved and high-resolution processing can be achieved. In addition, when it is installed in a marking device, a small scanning mirror can be used, and it is possible to realize low cost and high speed of the whole device. A built-in single-mode fiber can basically be obtained as a transverse-mode fiber.
       4. Excellent long-term stability. Because the laser is emitted from the optical fiber, if the optical fiber is fixed, there is basically no spatial fluctuation of the beam. In all-fiber lasers that do not contain free-space optics. Fiber lasers have short vibration wavelengths, good beam quality, long focal depths, and use condensing lenses to process objects.
       5. Wide gain range, high gain and high efficiency.
       6. It is easy to realize high power.
       7. Long-distance transmission is possible.
       8. It is easy to produce nonlinear optical effects.