Highly efficient high-power thulium-doped germanate glass fiber laser |
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Authors: | Wu Jianfeng Yao Zhidong Zong Jie Jiang Shibin |
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Institution: | NP Photonics Inc, Tucson, Arizona 85747, USA. jfwu@npphotonics.com |
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Abstract: | A 64 W fiber laser at 1.9 microm with a slope efficiency of 68% with respect to the launching pump power at 800 nm was demonstrated in a one-end pump configuration using a piece of 20 cm long newly developed thulium-doped germanate glass double-cladding single-mode fiber. A quantum efficiency of 1.8 was achieved. An output laser power of 104 W at 1.9 microm was demonstrated from a piece of 40 cm long fiber with a dual-end pump configuration. |
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