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对全光纤化高功率Er3+-Yb3+共掺光纤(EYDF)放大器进行了实验研究。采用小芯径双包层EYDF作为增益介质,多模高功率915 nm半导体激光器作为泵浦源,实现了EYDF放大器的全光纤化。对分布反馈(DFB)激光器输出的窄带信号进行放大,得到了斜率效率约为27.2%、最高2.14 W的高功率输出;实验中,未发现明显的受激布里渊散射(SBS)等非线性效应的影响。该放大器可以作为大芯径高功率EYDF激光放大系统的预放级,以获得适用于“人眼”安全应用领域需求的更高功率的激光输出。
An all-fiber high-power Er3 + -Yb3 + co-doped fiber (EYDF) amplifier was studied experimentally. Using a small core double clad EYDF as a gain medium, a multi-mode, high-power 915 nm semiconductor laser is used as the pump source to achieve full fiberization of the EYDF amplifier. The narrowband signal output from the distributed feedback (DFB) laser was amplified, and a high power output with a slope efficiency of about 27.2% and a maximum of 2.14 W was obtained. In the experiment, no obvious nonlinearities such as stimulated Brillouin scattering (SBS) Effect of the effect. The amplifier can be used as a pre-release stage for large core high power EYDF laser amplification systems to achieve higher power laser output for “human eye” safety applications.