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Highly efficient frequency doubling of a continuous-wave Yb-doped fiber laser with a passively-locked enhancement cavity is achieved. The increase in efficiency is a result of improved transverse mode matching between… Click to show full abstract
Highly efficient frequency doubling of a continuous-wave Yb-doped fiber laser with a passively-locked enhancement cavity is achieved. The increase in efficiency is a result of improved transverse mode matching between the fiber and doubling cavities, which is enabled by an alignment method presented here. An optical conversion efficiency as high as 36.8% from a launched 976?nm diode pump to a 532?nm green laser is obtained. The maximum 532?nm output is 24.5 W, which is limited by the onset of parasitic oscillations in the fiber laser.
Journal Title: Laser Physics Letters
Year Published: 2019
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