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The working principle of fiber laser marking machine

by:Leadtech Coding     2022-01-27

The main luminous source of the fiber laser marking machine uses rare earth element-doped fiber as the gain medium to emit light and work. Because the fiber core in the fiber laser is very thin, it is easy to form a high power density in the fiber under the action of the pump light, resulting in the 'number inversion' of the laser energy level of the laser working material. Therefore, when a positive feedback loop is properly added to form a resonant cavity, laser oscillation can be formed. In addition, because the fiber matrix has a wide fluorescence spectrum, fiber lasers are generally made tunable (that is, their wavelength can be adjusted within a certain range) , you can mark some materials with different shades or even different colors. The laser marking mainly uses the following principles:

1. The laser beam is used to irradiate the surface of various substances, so that the material itself undergoes chemical changes and discoloration, thereby Permanent marking of the product;

2. The deep layer of the material is exposed by the evaporation of the surface layer of the target material by laser light energy;

3. Burn off part of the material through laser light energy, so as to reveal the pattern and text to be etched.

Fiber laser marking machine

The main components of the fiber laser marking machine are ytterbium-doped fiber laser, laser power supply, PC numerical control system, optical system, built-in cooling system and other devices. The laser is output from the ytterbium-doped fiber, and the pump source is a carrier-grade single-tube diode, which has a long service life. In addition to the advantages of long service life, fiber lasers have higher energy efficiency and less maintenance requirements.

1. The fiber laser marking machine adopts fiber laser with a life span of up to 100,000 hours. The beam quality is high, the output is the fundamental mode (TEM00), and the diameter of the focusing spot is less than 20um. The divergence angle is 1/4 of that of the diode pumped laser. The single line is thinner, especially suitable for fine and precise marking.

2. Small size, low power consumption, the whole machine consumes less than 500W; built-in air-cooling cooling method, abandons the bulky water-cooling unit, and occupies a smaller area , the installation is easier, and it is truly energy-saving and portable.

3. High electro-optical conversion efficiency, easy to use, no need for optical adjustment or maintenance, compact structure, high system integration, and fewer failures.

4. No need for any maintenance, long service life, suitable for working in harsh environment.

5. The processing speed is fast, 2-3 times that of the traditional marking machine, optical scanning galvanometer, high laser repetition frequency, high speed without distortion.

6. Fiber lasers are equipped with optical isolators, which can effectively shield reflected light, and can be used on high-brightness and high-reflection materials such as gold, silver, copper, aluminum, and silicon. To operate, there is no need to deviate from the center of the field lens, which greatly broadens the application field. And for different metals, it can play a certain color by adjusting the frequency and energy.

7. The marking software is powerful, compatible with Coreldraw, AutoCAD, AdobeIllustrator and other software files; supports AI, PLT, PCX, DXF, BMP, etc., and can use SHX directly , TTF font library; support automatic Leadtech Coding, printing serial number, batch number, date, barcode, QR code, automatic number jumping, etc., USB interface output control.

(This article is edited by the editor, please be sure to indicate the source:)

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