Stimulate fiber lasers for laser cutting machine industry

Stimulate fiber lasers for laser cutting machine industry. Quartz glass tube in laser cutting machine is the 'core' fiber laser. After the advent of fiber laser, the high power fiber laser become one for active research direction in the field of laser. With the adoption of new type pump technology and the further development of high power semiconductor laser manufacturing industry mature, fiber laser has been rapid development. Compared with the traditional solid laser, high power fiber laser has simple structure, low threshold, the cooling performance is good, high conversion efficiency, good beam quality, etc. At present, by the vast number of scientific research and industry experts. Fiber laser in the laser cutting machine can use the fiber Bragg grating as the cavity mirror, so as to realize the whole structure of optical fiber. Pump coupling into the cavity mirror on the left side gain fiber, multiple reflections within the cladding pump through the doped fiber core, the length of the fiber with sufficient and choosing appropriate parameters, such as doping ions concentration, so that doping ions can fully absorb the pump. Fiber laser is a waveguide cavity device that wavelengths, the transmission by the optical fiber is responsible for this kind of structure is actually Fabry - Perot cavity structure. Fiber laser is actually a wavelength converter. On the pump wavelength photon is absorbed by the medium, form the population inversion, doped fiber after medium and the output laser have stimulated emission of radiation. Laser cutting machine in the need to use double clad fiber laser active fiber and double cladding photosensitive fiber, energy transmission optical fiber and other special fiber, with the constant improvement of the output power, to the requirements of the special optical fiber technology is becoming more and more high, therefore, the development of the special optical fiber will play an important role in the development of fiber laser. Represented by photonic crystal fiber is a new generation of special optical fiber will be applied gradually in the development of fiber laser. The development of special fiber, will lead to gain higher active fiber, bear the power density is bigger, the more effective absorption of the pump. Would make it easier for the grating fabrication, the stability of the grating better, make the grating in the optical fiber laser USES more widely; Will lead to higher energy transmission optical fiber can transmit power, to the high power laser transmits farther distance, to the transmission wavelength range is expanding; Will make the pump coupling is more easy to implement, can withstand the pump power is higher, and the loss is smaller.