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High power 739 nm VECSELs for future Yb+ ion cooling

Jonathan R. C. Woods, Hermann Kahle, Alan C. Gray, Jake Daykin, Anne C. Tropper, Corin Gawith, Mircea Guina, and Vasilis Apostolopoulos

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Abstract

We present an operational characterization of a vertical-external-cavity surface-emitting laser emitting around 739 nm with over 150 mW in a single fundamental spatial mode. Results show that the laser is capable of oscillating on a single cavity axial mode at 740 nm for up to 22 mW. Tuning of the optical emission is shown to reach 737.3 nm. Furthermore, at best performance, the laser exhibits a slope efficiency of 8.3% and a threshold power of 1.27 W for an output coupler reflectivity of 98%.

© 2021 Optical Society of America

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