All-solid-state large-mode-area near-zero dispersion-flattened microstructure optical fiber

Abstract

The invention discloses all-solid-state large-mode-area near-zero dispersion-flattened microstructure optical fiber. The all-solid-state large-mode-area near-zero dispersion-flattened microstructure optical fiber comprises a pure silica glass substrate, a fiber-core area and a coating area, wherein the refractive index of the pure silica glass substrate is n0; a microstructure is introduced into the fiber-core area, and the fiber-core area is commonly formed by a first-layer highly-doped silica column, second-layer highly-doped silica columns, third-layer highly-doped silica columns and the pure silica glass substrate; the first layer is one highly-doped silica column at the center, the radius is r1 and the refractive index is n1; the second layer is 6 highly-doped silica columns which are arranged according to the regular hexagon and enclose the first layer, the radius is r1 and the refractive index is n1; the third layer is 12 highly-doped silica columns which are arranged according to the regular hexagon and enclose the second layer, the radius is r2 and the refractive index is n2; the coating area consists of 18 lowly-doped silica columns which are arranged according to the regular hexagon and enclose the third layer of the fiber-core area and the pure silica glass substrate; for the lowly-doped silica columns, the radius is r3 and the refractive index is n3; and the distribution of the refractive index meets the condition that n3 is less than n0, n0 is less than n1 and n1 is less than n2, and the size of the doped silica columns meets the condition that r1 is more than r2 which is more than r3.

Description

technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to an all-solid-state large-mode area near-zero dispersion flat microstructure optical fiber. Background technique [0002] With the continuous progress of society, people's requirements for communication technology are getting higher and higher. Optical fiber, as a new generation of transmission medium, has a rapid development trend because of its large amount of information transmission and fast transmission speed. In the process of signal transmission, due to nonlinear reasons, additional loss, inter-channel crosstalk and signal frequency shift will occur in the transmitted signal; due to the accumulation of dispersion, pulse broadening and bit error rate increase, the above two factors will reduce the capacity of communication with quality. Under the same signal power, the optical fiber with large mode area characteristics can significantly reduce the power ...

AI Technical Summary

Problems solved by technology

However, the cladding and the core of the micro-structured optical fiber that contains air holes at the same time are prone to air hole collapse during drawing, which is difficult to prepare, has a low success rate of preparation, and high cost. The collapse of air holes inside the optical fiber increases splice loss and affects system performance

Images