Abstract Chalcogenide glass fiber usually possesses a single zero-dispersion wavelength (ZDW) that is more than 5 µm. Here, a novel W-typed double cladding chalcogenide glass fiber was designed and fabricated with optimized dispersion properties based on As2Se3-Ge7As23S70-Ge10As23Se67 glasses. The results show that there are two ZDWs locating at near-infrared 2.95 µm and far-infrared 11.77 µm, and the dispersion less than 8 ps/km/nm at this range. Based on numerical simulation and viscosity analysis, a novel W-typed double-cladding fiber is fabricated via extrusion method, and the lowest loss of 1.15 dB/m is obtained at 5.68 µm. The optimized structure and dispersion distribution of the fiber ensure the excellent supercontinuum generation. When pumping at 3 µm near the first ZDW, a bandwidth supercontinuum (SC) spanning from 1 to 10.9 µm can be obtained. By pumping at 5 µm, a broad bandwidth of SC output from 1.3 to 13 µm can be obtained. This kind of low ZDW fiber has great potential for the generation of supercontinuum in the future.

中文翻译：

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新型 W 型硫属化物纤维的色散调谐和超连续谱产生

摘要 硫属化物玻璃纤维通常具有大于 5 µm 的单个零色散波长 (ZDW)。在这里，基于 As2Se3-Ge7As23S70-Ge10As23Se67 玻璃，设计并制造了一种具有优化色散特性的新型 W 型双包层硫属化物玻璃纤维。结果表明，在近红外 2.95 µm 和远红外 11.77 µm 处有两个 ZDW，在该范围内色散小于 8 ps/km/nm。基于数值模拟和粘度分析，采用挤压法制备了一种新型W型双包层光纤，在5.68 µm处获得了1.15 dB/m的最低损耗。优化的光纤结构和色散分布确保了优异的超连续谱产生。当在第一个 ZDW 附近以 3 µm 泵浦时，带宽超连续谱 (SC) 跨越 1 到 10。可以获得 9 µm。通过以 5 µm 泵浦，可以获得 1.3 至 13 µm 的宽带宽 SC 输出。这种低ZDW光纤在未来产生超连续谱方面潜力巨大。