Basic Concept of Tailored Bars

Direct diode lasers are, in principle, more efficient and smaller than classic solid‐state lasers. But the combination of multiple beams from hundreds of individual emitters requires beam shaping and lensing at the expense of efficiency. At the costs for the micro‐optical elements and alignment, the efforts for super‐imposing of individual emitters with different techniques, assumption of the economic superiority over solid‐state laser sources is not so readily apparent — so far.