Highly efficient optically pumped vertical-emitting semiconductor laser with more than 20 W average output power in a fundamental transverse mode.
We have demonstrated an optically pumped vertical-external-cavity surface-emitting laser (OP-VECSEL) generating more than 20 W of cw output power in a fundamental transverse mode (M2 approximately 1.1) at 960 nm. The laser is highly efficient with a slope efficiency of 49%, a pump threshold of 4.4 W, and an overall optical-to-optical efficiency of 43%.
Rudin
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B
Department of Physics, Institute of Quantum Electronics, ETH Zürich, Zürich, Switzerland. rudin@phys.ethz.ch
Rutz
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A
Hoffmann
M
M
Maas
D J H C
DJ
Bellancourt
A-R
AR
Gini
E
E
Südmeyer
T
T
Keller
U
U