It’s an excellent question. Most laser users know that a KTP crystal converts 1064 nm into 532 nm by “frequency doubling”. But what about the other wavelengths—585 nm, 650 nm and the various colours advertised by some manufacturers? Is the laser somehow producing entirely new wavelengths? Well… yes. But not quite in the way many… Continue reading If a Nd:YAG laser can only produces 1064 nm light… where do all the other wavelengths come from?