The present invention relates to a device for treating
dysplasia, tumours and / or bacterial and viral infections, comprising a first
laser (20), at least one second
laser (30), a
wavelength combiner (40) for combining the
radiation emitted from the first
laser and the second laser, and an optical supply apparatus (50), wherein the optical supply apparatus is connected to the
wavelength combiner and is configured to supply the
radiation combined in the
wavelength combiner to a treatment region, wherein the first laser (20) is configured to emit narrow-band
radiation at a first wavelength from the ranges from 400 nm to 420 nm, preferably 410 nm, 440 nm to 460 nm, preferably 450 nm, 520 nm to 540 nm, preferably 530 nm, 620 nm to 640 nm, preferably 630 nm, 645 nm to 675 nm, preferably 660 nm, 680 nm to 700 nm, preferably 690 nm, 745 nm to 775 nm, preferably 760 nm, 800 nm to 820 nm, preferably 810 nm, 910 nm to 930 nm, preferably 920 nm, 970 nm to 990 nm, preferably 980 nm, 1035 nm to 1100 nm, preferably 1065 nm, 1460 nm to 1490 nm, preferably 1470 nm or 1930 nm to 1950 nm, preferably 1940 nm, and the second laser (30) is configured to emit narrow-band radiation at a second wavelength from the range from 1262 nm to 1272 nm, preferably 1264 nm to 1270 nm, particularly preferably 1267 nm.