New Direction of Fiber Laser Development

The proportion of fiber lasers in industrial lasers has greatly increased, and they are industrial lasers with a very large market share. From the perspective of technological development, the domestic fiber laser industry basically continues the mature experience of foreign countries. Through pump source improvement, doping fiber, beam synthesis technology, etc., the power and processing capacity of the stand-in laser are continuously improved to meet the needs of the marking and cutting fields. Market demand. Due to the relatively single downstream market and relatively concentrated demand for laser processing power, the domestic fiber laser industry has been in an extensive operation stage of "power-splitting" for a long time in the past, lacking technological innovation and the motivation to expand new applications.

What are the new directions for fiber lasers?

The main limiting factors of fiber laser output power include pump power, stimulated Raman scattering, and thermal lensing. Selecting fiber devices with better performance and designing and integrating the devices more scientifically can further improve the output power of single-fiber single-mode fiber lasers. In addition to the continuous increase in power, high average power, high peak power pulsed fiber lasers, ultra-short pulsed fiber lasers, higher brightness, modularization, intelligence, energy saving and environmental protection will all become important future development directions of fiber lasers. From the perspective of the material processing application market, high-power fiber lasers are replacing traditional processing methods, and the application trend in the fields of thick plate cutting, welding, cladding and cleaning is gradually becoming clear. On the other hand, fiber laser ultrafast lasers will become a very attractive growth point for applications in glass, brittle materials, biomedical, display panels, PCBs, etc. From the perspective of market applications, fiber laser micro-nano processing is still the dominant method of ultrafast lasers. With the gradual maturity of the downstream application market, the continuous breakthrough of product stability and single-pulse energy, and the continuous progress of the autonomy of core components, the ultrafast laser application market will be further opened.

Break the traditional application and explore the new boundary of laser

The traditional glass cutting technology uses diamond or alloy to draw micro grooves on the glass, and applies external force on both sides of the micro groove to extend the glass in the thickness direction, forming longitudinal cracks to achieve cutting, which can meet the processing requirements of traditional glass. In recent years, as materials such as touch glass and sapphire have become more and more popular in the field of smartphones, non-contact ultrafast laser processing has become the most important processing method. With the characteristics of ultra-fast pulse time and ultra-high peak power, ultra-fast laser enables the energy of the optical pulse to be injected into a very small area of action at an extremely fast speed, and the instantaneous high-energy density deposition will change the absorption and movement of electrons. , to avoid the influence of energy transfer and diffusion caused by laser linear absorption, so as to realize the precision processing of brittle materials.

For fiber laser technology, it can be used in many fields such as cells, poles, soft connections, liquid injection holes, explosion-proof valves, modules, and tab welding in the production process of power batteries. Among them, MOPA pulsed fiber laser has excellent beam quality characteristics, high brightness, high peak value, high energy density output, high processing efficiency and smooth cutting, and has anti-reflection characteristics, which is an ideal light source for cell electrode chip cutting.