High-power, single-frequency, pulsed fiber amplifiers are required in light detection and ranging, coherent laser detection, and remote sensing applications to reach long range within a short acquisition time. However, the power-scaling of these amplifiers is limited by nonlinearities generated in the optical fibers, in particular by stimulated Brillouin scattering (SBS). In this regard, the use of multicomponent phosphate glasses maximizes the energy extraction and minimizes nonlinearities. Here, we present the development of a single-stage, hybrid, pulsed fiber amplifier using a custom-made multicomponent Yb-doped phosphate fiber. The performance of the phosphate fiber was compared to a commercial Yb-doped silica fiber. While the latter showed SBS limitation at nearly 6.5 kW for 40 cm length, the maximum achieved output peak power for the multicomponent Yb-doped phosphate fiber was 11.7 kW for 9 ns pulses using only 20 cm with no sign of SBS.

中文翻译：

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单频脉冲Yb 3+掺杂多组分磷酸盐功率光纤放大器

在光检测和测距，相干激光检测和遥感应用中，需要大功率，单频，脉冲光纤放大器，以在较短的采集时间内达到远距离。然而，这些放大器的功率缩放受到光纤中产生的非线性的限制，特别是受激布里渊散射（SBS）的限制。在这方面，使用多组分磷酸盐玻璃可最大程度地提高能量提取效率，并最大程度地减少非线性。在这里，我们介绍了使用定制的多组分掺Yb磷酸盐纤维的单级，混合，脉冲光纤放大器的开发。将磷酸盐纤维的性能与商业掺Yb的二氧化硅纤维进行了比较。后者在40 cm的长度上显示了将近6.5 kW的SBS限制，