Electron-pumped high-efficiency semiconductor laser

Abstract
We report on an efficient semiconductor laser array pumped by a high‐energy electron gun. A peak power of 350 kW in a 4‐ns pulse has been measured from a 25‐mm2 CdS laser. For the materials studied (CdS, ZnxCd1−xS, and ZnSxSe1−x), laser action has been obtained in the blue‐green region of the spectrum.