High power diode laser

High-power diode lasers (HLDL) consist of a large number of individual diode lasers , which are combined into a single high-power beam (now over 60 kilowatts) using various methods. High-power diode lasers are used for material processing ( welding , remelting , hardening ) or for pumping other lasers - e.g. B. disk laser or fiber laser - used.

construction

First, the individual beams in a multi-emitter laser diode (ingots, Eng. Bar with) aspherical cylindrical lenses in its fast axis (strongly divergent radiation plane) collimated . Alternatively, you can also use powerful single diodes with a power of up to 10 W. Then several of these rays are geometrically reflected alternately into one another. To do this, the bars are stacked in stacks and the corresponding micro-optical components are positioned in front of them. Then you can add several of these rays by combining their linear polarizations and their different wavelengths . This is done with polarization- and wavelength-selective mirrors. In this way, you can combine, for example, 6 stacks with 500 W each to form a beam of 3 kW (3 different wavelengths, 2 stacks per wavelength, which are oriented 90 ° to each other).