We demonstrate flat supercontinuum (SC) generation in a piece of step-index tellurite fiber pumped by a noise-like mode-locked fiber laser in the deep normal dispersion region. The noise-like pulse emitted from a simple all-fiber mode-locked laser is used as the pump directly and the cascaded stimulated Raman scattering leads to the spectral broadening to the long wavelength region. Flat SC spanning from $\sim 1570$ nm to $\sim 1900$ nm is obtained and no obvious spectral defects are observed. These results show the great advantage of noise-like pulse pumping in the deep normal dispersion region and the potential of noise-like pulse pumped mid-infrared SC generation.

中文翻译：

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在深正常色散区泵浦的碲酸盐光纤中产生平坦的超连续谱

我们展示了在深正常色散区域中由类噪声锁模光纤激光器泵浦的一段阶跃折射率碲酸盐光纤中产生平坦的超连续谱 (SC)。从简单的全光纤锁模激光器发出的类噪声脉冲直接用作泵浦，级联受激拉曼散射导致光谱展宽到长波长区域。平面 SC 跨越 $\sim 1570$ 纳米到 $\sim 1900$ nm，未观察到明显的光谱缺陷。这些结果显示了在深正常色散区域中类噪声脉冲泵浦的巨大优势和类噪声脉冲泵浦中红外 SC 产生的潜力。