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Laser refers to the light generated by stimulated radiation of matter. Laser has good monochromatism, coherence and directionality, and its characteristics are expressed by wavelength (λ) or frequency. According to the different wavelength, laser can be divided into: infrared laser, visible laser, ultraviolet laser.
Compared with ordinary light source, laser has high brightness, high directionality and other excellent characteristics, has become a new technology and means, widely used in communication, industrial processing, military weapons, medical and many other fields.
Laser is the production, output laser device, according to the laser working material categories of different, can be divided into gas laser, liquid laser, solid laser, semiconductor laser, etc.; According to the different wavelength, generally can be divided into infrared laser, visible laser and ultraviolet laser; According to the different pulse width, can be divided into millisecond laser (10-3 seconds), microsecond laser (10-6 seconds), nanosecond laser (10-9 seconds), picosecond laser (10-12 seconds), femtosecond laser (10-15 seconds); According to the different output power, it can be divided into high-power lasers (above 1000W), medium-power lasers (100W-1000W), low-power lasers (below 100W) and so on.
Ultrafast lasers represented by picosecond and femtosecond lasers have very short laser pulses (pulse duration is only a few picoseconds or femtosecond) and extremely high peak power, used in material processing has a unique hyperfine, no thermal impact and other excellent performance.
Processing "hyperfine" - ultrafast laser can focus to ultrafine space area, at the same time has a very high peak power and a short laser pulse, when processing section and tidy, thermal diffusion, micro cracks and metallurgical defects, processing process will not affect the space around the range of materials involved, to do the hyperfine processing.
Processing "no thermal impact" -- for conventional lasers with pulse duration greater than 10ps, the thermal process will play a major role when interacting with the material. Pulse duration less than 10 ps ultrafast laser, because only picosecond and femtosecond pulse duration magnitude, is far less than the material in the excited electron transfer by energy release in the form of time, energy to release the pulse has ended, and avoid the energy transfer, transformation and the existence of the heat and thermal diffusion, to realize the true sense of the word "cold" laser processing.
Ultrafast laser has a wide range of industrial applications. With the development of consumer electronics, new display, biomedical, 3D printing, high-end equipment and other new applications, the precision requirements for laser processing are increasingly high. Ultrafast laser has become an important direction of precision processing. Laser enterprises at home and abroad have laid out the laser/ultrafine laser equipment market. In the core ultrafast laser market, foreign companies are basically dominated at present, represented by Coherent, Spectrum Physics, Express, NKT, EKSPLA, Lihgt Conwersion, Lumentum, EdgeWave, AMPlitude and other companies. Domestic enterprises such as Dazu laser, Huari laser, Anyon laser, Hong Top New Technology, Shengxiong laser, Beilin laser, Zhuo Lei laser and so on are vigorously promoting the industrialization of technology, and have achieved rapid development in the industrial links such as ultra-fast laser equipment, laser precision processing, laser technology research and development, technology application and product production.
In 2015, Zolum Laser established a strategic cooperative relationship with Chinese Academy of Sciences. The Chinese Academy of Sciences will provide continuous technical support and development power for Zolum Laser.
