Holmium-doped silica fibers combining high doping and high efficiency
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We present a 2.1 µm holmium-doped fiber laser, core pumped by a 1.94 µm thulium-doped fiber laser. The laser is based on an in-house drawn, highly holmium-doped silica fiber (3850 mol ppm). We achieved a high output power up to 22.5 W and at the same time hi... ...
