Industrial production requires high reliability, small size, quietness and easy handling. Fiber lasers are widely favored for their compact layout, high light conversion compliance, short warm-up time, small influence from the situation, maintenance-free, and easy coupling with optical fibers or light-guiding systems. Nowadays, fiber lasers are gradually replacing the leading positions of traditional lasers in laser marking, laser welding, and laser cutting.

In the marking field, due to the high beam quality and positioning accuracy of fiber lasers, the fiber marking system is replacing the Nd:YAG pulse laser marking system that is not subject to high carbon dioxide laser and xenon lamp pumping. In the Taixi and Japan markets, this kind of substitution is held in large numbers. In Japan alone, the monthly demand is higher than 100 units. According to IPG, German BMW Motors had purchased their high-power fiber lasers for use in door welding production lines.

As the world‘s largest industrial manufacturing country, China‘s demand for fiber laser marking machines is very large, and it is expected to have more than 2,000 units per year. In the field of laser welding and cutting, with the development of thousands of watts or even tens of megawatts of fiber lasers, fiber lasers have also been applied.

Compared to other light sources, fiber lasers have many advantages as sensing sources. First of all, fiber lasers have excellent performances such as high utilization rate, tunability, good stability, compact size, light weight, easy maintenance and good beam quality. Secondly, fiber lasers are well coupled to fiber optics and are fully compatible with existing fiber optic devices, enabling full fiber testing.

Fiber optic sensing based on tunable narrow linewidth fiber lasers is now one of the hottest applications in this field. The fiber laser has a narrow spectral line width, an extremely long dry length, and can be quickly modulated for frequency. Applying this narrow linewidth fiber laser to the diffuse sensing system enables ultra-long-distance, ultra-high-precision fiber sensing. In the United States and Europe, this sensing skill based on tunable narrow linewidth fiber lasers is used throughout. China expects to have more than 100 such optical fiber lasers per year.

Compared with other types of lasers, fiber lasers have obvious advantages in layout compactness, heat dissipation, beam quality, volume and compatibility with existing systems, and have been widely used in the field of communication.

The mode-locked fiber laser with rare earth doped fiber as the gain medium can produce ultrashort optical pulses with high repetition rate and pulse width of picosecond or femtosecond, and its lasing wavelength falls on the optimal window of fiber communication 1.55 μm. In the band, it is the aspiration source of the high-speed optical communication system in the future. Nowadays, mode-locked fiber lasers with repetition rates of 10 GHz and 40 GHz have been developed. Once this communication network is deployed, the demand for this example laser will be enormous.

Today, most of the lasers used in clinical applications are argon ion lasers, carbon dioxide lasers, and YAG lasers, but usually their beam quality is not high, they have a very large volume, they require a huge water cooling system, and they are very difficult to place and maintain. Fiber lasers can be added. Since water molecules have a suction peak at 2 μm, using a 2 μm fiber laser as a surgical procedure can achieve rapid hemostasis and avoid damage to the human body by surgery.