We design and simulate a hollow AsSe₂-As₂S₅ microstructured fiber surrounded by air holes with nearly-zero flattened all-normal dispersion profile. Simulation results show that the coherent first-order orbital angular momentum (OAM${}_{\mathrm{1,1}}$) supercontinuum (SC) spectrum extending from 1.3 to 11 $\mathrm{\mu }$m at −40 dB level, which can be achieved by pumping a chirp-free hyperbolic secant pulse with 100 fs pulse duration and 20 kW peak power at the wavelength of 6 $\mathrm{\mu }$m into an 11 mm proposed fiber. Due to the flexible controllability for chromatic dispersion of this fiber, several coherent SC spectra generated by different OAM modes are analyzed.

我们设计并模拟了空心 AsSe ₂ -As ₂ S ₅微结构光纤，其周围环绕着具有几乎为零的扁平全法向色散分布的气孔。仿真结果表明，相干一阶轨道角动量（OAM${}_{\mathrm{1,1}}$) 超连续谱 (SC) 光谱从 1.3 扩展到 11 $\mathrm{\mu }$m 在 -40 dB 水平，这可以通过泵浦一个无啁啾双曲割线脉冲来实现，脉冲持续时间为 100 fs，峰值功率为 20 kW，波长为 6 $\mathrm{\mu }$m 成 11 毫米建议的光纤。由于该光纤色散的灵活可控性，分析了由不同 OAM 模式生成的几个相干 SC 光谱。