Hao Jinping, Zhao Hong, Zhang Dayong, Zhang Liming, Zhang Kun
Appl Opt. 2015 May 20;54(15):4857-62. doi: 10.1364/AO.54.004857.
This paper demonstrates an all-fiber narrow linewidth amplifier with a seed based on narrow linewidth fiber Bragg gratings (FBGs). The fiber amplifier achieves a narrow bandwidth output of 823 W, with an opto-optic efficiency of 84.5%. The pair of FBGs in the seed configuration helps to assure a narrow linewidth of the laser as 0.08 nm. In the laser profile, we introduce a cladding stripper with a sectional structure, which realizes high pump power leakage with high efficiency. The paper also discusses the impact of seed linewidth and fiber length on the SBS threshold in a narrow bandwidth laser. Based on this analysis, we discovered ways to inhibit SBS onset and scale power output.
本文展示了一种基于窄线宽光纤布拉格光栅（FBG）种子源的全光纤窄线宽放大器。该光纤放大器实现了823W的窄带宽输出，光光效率为84.5%。种子源配置中的一对FBG有助于确保激光器的窄线宽为0.08nm。在激光器结构中，我们引入了一种具有分段结构的包层剥离器，其实现了高效率的高泵浦功率泄漏。本文还讨论了种子线宽和光纤长度对窄带宽激光器中受激布里渊散射（SBS）阈值的影响。基于此分析，我们发现了抑制SBS起始和扩大功率输出的方法。
