We report on an ytterbium-free, erbium-doped single-mode all-fiber laser reaching a record output power of 107 W at 1598 nm, with a slope efficiency of 38.6% according to the absorbed pump power at 981 nm. The erbium-doped gain fiber, co-doped with cerium, aluminum, and phosphorus, was fabricated in-house with adjusted doping concentrations to reduce erbium ions clustering, thereby increasing efficiency while keeping the numerical aperture low to ensure a single-mode laser operation. The addition of cerium co-dopant in the core glass of an erbium system is used for the first time, to the best of our knowledge, in order to adjust the fiber’s numerical aperture without increasing the erbium concentration. Numerical modeling, validated by the experimental results, demonstrates that adding aluminum and phosphorus at high concentration mitigates erbium ions clustering, with an estimated erbium paired ions of only 5.0% in the reported gain fiber.

中文翻译：

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100瓦级单模无光纤激光器

我们报告了一种无，掺的单模全光纤激光器，在1598 nm处达到创纪录的107 W输出功率，根据在981 nm处吸收的泵浦功率，其斜率效率为38.6％。掺有铈，铝和磷的掺gain增益光纤是在室内制造的，其掺杂浓度经过调整，以减少离子的聚​​集，从而提高了效率，同时保持较低的数值孔径，以确保单模激光操作。 。据我们所知，这是第一次在an系统的芯玻璃中添加铈共掺杂剂，以便在不增加浓度的情况下调节纤维的数值孔径。数值建模，经实验结果验证，