Osram Opto Semiconductors has produced a broad area laser diode with a lateral brilliance of up to 4.8 W/(mm*mrad) in the laboratory. The more brilliant the laser, the more efficiently it can inject its light into optical fibers. This then increases the output power of modules for pumping fiber lasers used for material processing. This progress is one of the results of the project “Integrated microoptical and microthermal elements for diode lasers of high brilliance” (IMOTHEB) which was funded by the German Federal Ministry of Education and Research and which has now been successfully completed.