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Power scaling method for 2-μm diode-cladding-pumped Tm~(3+)-doped silica fiber lasers that uses Yb~(3+) codoping

机译:使用Yb〜(3+)共掺杂的2μm二极管包层泵浦Tm〜(3+)掺杂石英光纤激光器的功率缩放方法

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摘要

Unidirectional dual-wavelength pumping at 805 and 975 nm of a Tm~(3+)-doped silica double-clad fiber laser that has been codoped with Yb~(3+) is demonstrated. With equal 2-wt.% concentrations of the Tm~(3+) and Yb~(3+) ions, slope efficiencies of 49% (57%) and 35% (40%) with respect to the launched (absorbed) pump power of the 805- and 975-nm pump wavelengths, respectively, were obtained. Efficient Yb~(3+)→Tm~(3+) energy transfer and efficient cross relaxation combined with minimal upconversion losses were thus operating. At the maximum output power of 18 W, the fiber laser operated at a center wavelength of 2050 nm.
机译:展示了掺有Yb〜(3+)的掺Tm〜(3+)石英双包层光纤激光器在805和975 nm处的单向双波长泵浦。当Tm〜(3+)和Yb〜(3+)离子的浓度相等于2 wt。%时,相对于启动(吸收)的泵,斜率效率分别为49%(57%)和35%(40%)分别获得了805和975 nm泵浦波长的功率。因此,有效的Yb〜(3+)→Tm〜(3+)能量转移和有效的交叉弛豫以及最小的上转换损耗都在运行。在18 W的最大输出功率下,光纤激光器的中心波长为2050 nm。

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