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Optimization of resonantly cladding-pumped erbium-doped fiber amplifiers for space-borne applications

机译：适用于航天应用的谐振包层掺光纤放大器的优化

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摘要

Lasers for use in space-borne applications require ultrahigh efficiency due to limited heat dissipation and power generation capacity. In particular, interplanetary optical communication systems require high-efficiency, moderate-power (>4 W) optical transmitters in the 1600 nm wavelength range. Resonantly pumped dual-clad erbium-doped fiber lasers are best suited for this purpose. Parametric numerical optimizations are performed using a two-level propagation model modified to include spatial effects specific to large-mode-area fibers. Propagation loss mechanisms are found to be limiting factors due to the relatively low cross-sections and low quenching-free doping densities of erbium. Although experimental reports have demonstrated efficiencies up to 33%, simulation results indicate that over 53% power-conversion efficiency can be achieved using commercial fibers, and over 75% can be achieved using custom fibers employing propagation-loss mitigation strategies.
机译：由于有限的散热和发电能力，用于航天应用的激光器需要超高效率。特别是，行星际光通信系统需要在1600 nm波长范围内具有高效，中等功率（> 4 W）的光发射机。共振泵浦双包层掺fiber光纤激光器最适合于此目的。参数数值优化是使用两级传播模型执行的，该模型经过修改以包括特定于大模区域光纤的空间效应。由于的相对较低的横截面和较低的无猝灭掺杂密度，因此发现传播损失机制是限制因素。尽管实验报告已证明效率高达33％，但仿真结果表明，使用商用光纤可以实现超过53％的功率转换效率，而使用采用传播损耗缓解策略的定制光纤可以实现超过75％的功率转换效率。

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