Abstract
A high beam quality 978nm vertical external cavity surface emitting lasers pumped by circular beam spot is presented. The VECSEL wafer contains 13 resonant periodic gains, which consisted of strain quantum-wells compensated symmetrically, and double-band mirror. 740mW 978nm and near-diffraction limit (M2=1.05) circular symmetry laser beam is obtained when pumped power is 3.9W, optical conversion efficiency is 18.97% and slope efficiency is 35.2%.
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Schedule a callMore From: Optik - International Journal for Light and Electron Optics
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