Work

Distributed emitter design for high-power semiconductor laser bars delivering 600 W under CW operation

Year: 2026

Type: article

Abstract: We systematically investigate the influence of emitter distribution on the performance of the laser bar through both simulations and experiments. Experimental results show that by optimizing the structure and number of emitters, the bar, featuring a cavity length of 6 mm and a periodic distribution of 24 emitters, achieves the highest output power of 650 W at 730 A under CW operation. Its maximum electro-optical conversion efficiency is 67.19%, obtained at an output power of 301 W. Meanwhile, by adopting a non-periodic emitter distribution, the bar with 12 emitters achieves 643 W at 720 A under CW operation. Its maximum electro-optical conversion efficiency is 68.07%, obtained at an output power of 263 W. Its thermal resistance is reduced by 6.3% compared with that of the conventional structure.

Source: Optics Express

DOI: 10.1364/oe.613612