The research of fiber-coupled high power diode laser

High-power diode laser system is still belonging to the novel laser system currently. To realize the output of fiber coupled high power diode laser will greatly enhance the applications of diode laser. In this article, we simulated beam shaping and fiber coupling of diode laser with optical design software ZEMAX R , and discussed the problems would be attended in the process of fiber coupling. Experiments on the beam shaping and fiber coupling were studied. Shape the diode laser beam, homogenize fast and slow axis beam quality, and then realize high power diode laser output through polarization coupling and wavelength coupling. Finally through the self-developed fiber coupling device, we achieved a multi-wavelength high-power fiber-coupled diode laser output, the fiber core diameter 600um, NA 0.22. Before fiber coupling the power of the diode laser was 773W, after fiber coupling, the output power was 664W, and the efficiency of the fiber coupling is up to 85.9%.The fluctuation of the power is less than 1%.