Laser bars with high output power (up to several hundred watts per bar) are essential for high-performance industrial laser systems and efficient pump sources, particularly in applications with line-shaped pump geometries. Their key advantage lies in the shared substrate as well as the uniform cooling and electrical contacting of all emitters. This results in low current density per emitter, homogeneous current distribution, and overall high robustness in high-power operation.

At the same time, however, the effort required for collimation and beam shaping increases, for example in fiber coupling. This is ue to the comparatively lower beam quality in the slow axis, caused by the dense emitter arrangement. Precision micro-optics enable efficient beam combining, homogenization, and shaping of the beam fields. They ensure that performance, reliability, and production consistency remain stable even at high power levels.