Stimulated Brillouin scattering suppression through laser gain competition: scalability to high power.
Stimulated Brillouin scattering suppression through laser gain competition: scalability to high power.
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DOI：
10.1364/ol.35.003114
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发表时间：
2010-09
期刊：
影响因子：
3.6
通讯作者：
I. Dajani;C. Zeringue;Chunte A. Lu;C. Vergien;L. Henry;C. Robin
中科院分区：
文献类型：
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作者：
I. Dajani;C. Zeringue;Chunte A. Lu;C. Vergien;L. Henry;C. Robin
我们展示了在掺Yb光纤放大器中抑制受激布里渊散射(SBS)的方法是在宽频和单频激光的组合中进行播种，这两种光束被充分分开以抑制四波混频，并允许两个信号之间有效的激光增益竞争。在实验中，使用了整体式光纤结构。在选择合适的种子功率比的情况下，我们能够产生单频1064 nm光，斜率效率为78%，同时抑制了背向散射的斯托克斯光。我们讨论了高功率的可扩展性，其中可以通过量子缺陷加热在光纤的输出端诱导出大的温度梯度，从而获得与反抽运相当的受激布里渊散射抑制因子。
We demonstrate stimulated Brillouin scattering (SBS) suppression in a Yb-doped fiber amplifier by seeding with a combination of broad- and single-frequency laser beams that are separated sufficiently to suppress four-wave mixing and to allow for efficient laser gain competition between the two signals. In the experiment, a monolithic fiber configuration was used. With appropriate selection of seed power ratio, we were able to generate single-frequency 1064 nm light with a slope efficiency of 78% while simultaneously suppressing the backscattered Stokes light. We discuss scalability to high power wherein a large thermal gradient can be induced at the output end of the fiber via quantum defect heating, leading to an SBS suppression factor comparable to counterpumping.