High bandwidth multimode optical fiber

The invention provides a high bandwidth multimode optical fiber. From the center of the high-bandwidth multimode optical fiber to the outer wall of the high-bandwidth multimode optical fiber, the high-bandwidth multimode optical fiber comprises a core layer, an inner cladding layer, a barrier layer, a sunken layer and an outer cladding layer, the refractive index of the core layer from the center to the outer wall is distributed in a power exponential function mode, the refractive index of the center of the core layer is the largest, the refractive index of the inner cladding layer from the center to the outer wall is gradually reduced, and the refractive index of the blocking layer is smaller than the refractive index of the inner cladding layer and larger than the refractive index of the sunken layer. The high-bandwidth multimode optical fiber provided by the invention is relatively good in bandwidth performance. 本发明提供一种高带宽多模光纤。沿高带宽多模光纤的中心至高带宽多模光纤的外壁，包括依次包覆的芯层、内包层、阻隔层，下陷层和外包层；芯层从中心到外壁方向的折射率呈幂指数函数分布，芯层的中心的折射