Yan Bin, Huang Tao, Zhang Weiwang, Wang Juan, Yang Lingling, Yang Peilong, Xia Kai, Bai Shengchuang, Zhao Ruwei, Wu Duanduan, Liu Yongxing, Li Xing, Dai Shixun, Nie Qiuhua
Opt Express. 2021 Feb 1;29(3):4048-4057. doi: 10.1364/OE.415534.
We demonstrate a watt-level mid-infrared supercontinuum source, with the spectrum covering the infrared region from 2 to 6.5 µm, in an all-fiber structured laser transmission system. To further improve the SC spectral bandwidth, power and system compactness in the follow-up AsS fiber, we theoretically and experimentally explored some knotty problems that would potentially result in the AsS fiber end-facet failure and low SC output power during the high-power butt-coupling process and proposed an optimal coupling distance on the premise of the safety of AsS fiber end face. In addition, we also built a multi-pulse pumping model for the first time to more precisely estimate the SC spectral evolution in AsS fiber. This work will give an important reference to someone who is working on the all-fiber structured, high-power mid- and far-infrared supercontinuum source.
我们在全光纤结构的激光传输系统中展示了一种瓦级中红外超连续谱源，其光谱覆盖2至6.5 µm的红外区域。为了在后续的砷硫光纤中进一步提高超连续谱的带宽、功率和系统紧凑性，我们从理论和实验上探索了一些棘手问题，这些问题在高功率对接耦合过程中可能导致砷硫光纤端面失效和超连续谱输出功率低，并在确保砷硫光纤端面安全的前提下提出了最佳耦合距离。此外，我们还首次建立了多脉冲泵浦模型，以更精确地估计砷硫光纤中超连续谱的演化。这项工作将为致力于全光纤结构的高功率中红外和远红外超连续谱源的研究人员提供重要参考。
