Strahldiagnostik- and feedback system and method for spektralstrahlkombinierteLaser

The invention relates to a laser beam of, for diagnostic troubleshooting. For example, a wavelength drift of particular Spektrahlstrahlkombinations- (SBC) laser systems. The diagnostic system measures the output of the laser, a feedback is effected on the basis of this measurement to control the fiber laser and / or the optical fiber amplifier or regulate. For this purpose, the invention comprises an output diffractive optical element and a source of a plurality of substantially monochromatic light beams, a first light beam having a first central wavelength and a second light beam having a second central wavelength, wherein the plurality of light beams different from the first central wavelength. The plurality of beams is directed from different angles on the output diffraction element on a single site, thus the output diffraction element then these light rays spectrally combined into a single beam. A diagnostic device to determine if the first light beam is misaligned, and if so, a regulator is controlled to regulate the adjustable characteristic of the first light beam to allow the first light beam is aligned with respect to the combined single beam.