Mid-infrared region (2–20 ​μm) is an important region of electromagnetic spectrum. Most of the molecules including CH₄, CO, NO, NO₂, C₆H₆, TNT, NH₃, SF₆, HNO₃, greenhouse gas radiation etc. have their fundamental vibrations in this domain. Thus, the mid-infrared region is known as ‘molecular fingerprint region’ and desirable to get the signature of these molecules. Tellurite and chalcogenide glasses have the advantages of a wide transparency window (up to ~20 ​μm) and very high optical nonlinearities, making them decent candidates for the mid-infrared supercontinuum generation. Photonic crystal fibers provide the wavelength-scale periodic arrangement of microstructure along their length. The core of the photonic crystal fibers and two-dimensional photonic crystal based on diverse geometries and the materials, permitting supercontinuum generation due to various nonlinear effects in an enormously broad spectral range. In this review paper, we report the recent developments in the field of mid-infrared supercontinuum generation in both the tellurite and chalcogenide glass state-of-the-art optical fibers. Particular attention is paid to the mid-infrared supercontinuum generation in the step-index, suspended-core, tapered, and photonic crystal fibers or microstructured optical fibers in tellurite and chalcogenide glasses. The coherence property of mid-infrared supercontinuum generation in all-normal dispersion engineered specialty optical fibers is also reviewed.

中红外区（2-20μm）是电磁波谱的重要区域。包括CH ₄、CO、NO、NO ₂、C ₆ H ₆、TNT、NH ₃、SF ₆、HNO ₃、温室气体辐射等在内的大多数分子都在该域中具有基本振动。因此，中红外区域被称为“分子指纹区域”，是获得这些分子特征的理想区域。碲酸盐和硫属化物玻璃的优点是透明窗口宽（高达~20μm）和非常高的光学非线性，使它们成为中红外超连续谱的合适候选者。光子晶体光纤沿其长度提供微结构的波长尺度周期性排列。光子晶体光纤和二维光子晶体的核心基于不同的几何形状和材料，由于非常宽的光谱范围内的各种非线性效应，允许产生超连续谱。在这篇综述论文中，我们报告了亚碲酸盐和硫属化物玻璃最先进光纤中红外超连续谱产生领域的最新进展。特别注意阶跃、悬核、锥形、亚碲酸盐和硫属化物玻璃中的光子晶体光纤或微结构光纤。还综述了全正常色散工程特种光纤中中红外超连续谱产生的相干特性。