Low-attenuation and large-effective-area single-mode optical fiber

Abstract

The invention relates to a low-attenuation and large-effective-area single-mode optical fiber. The single-mode optical fiber comprises a core layer and wrapping layers and is characterized in that the radius r1 of the core layer is 4.8 micrometers-6.5 micrometers, and the relative refraction index delta1 of the core layer is 0.10%-0.24%; the core layer is wrapped with the inner wrapping layer, the sunk inner wrapping layer, the transitional outer wrapping layer and the outer wrapping layer in sequence from inside to outside; the radius r2 of the inner wrapping layer of the optical fiber is 8.5 micrometers-15 micrometers, the relative refraction index delta2 of the inner wrapping layer of the optical fiber is -0.3%--0.05%, the radius r3 of the sunk inner wrapping layer is 14 micrometers-22 micrometers, the relative refraction index delta3 of the sunk inner wrapping layer is -0.45%--0.2%, the radius r4 of the transitional outer wrapping layer is 35 micrometers-50 micrometers, and the relative refraction index delta4 of the transitional outer wrapping layer is -0.25%--0.05%; the outer wrapping layer is a pure silica glass layer. The attenuation parameter of the optical fiber is decreased; through reasonable design of all fiber core layer sections of the optical fiber, the optical fiber has an effective area larger than or equal to 100 square micrometers. The overall performance parameters of cutoff wavelength, bending loss and chromatic dispersion of the optical fiber are good in an application wave band, and a multilayer stepped sunk wrapping layer structure is adopted for the section of the optical fiber and well reduces the bending loss of the optical fiber.

Description

technical field [0001] The invention relates to the technical field of optical fiber transmission, in particular to a single-mode optical fiber with low attenuation and large effective area. Background technique [0002] With the rapid growth of IP network data services, operators' demand for transmission capacity continues to increase, and the single-fiber capacity in the existing network is gradually approaching the limit value of 100Tbps. The 100G transmission system has entered the first year of commercial use. How to further increase the transmission capacity on the basis of 100G transmission signals is the focus of attention of various system equipment manufacturers and operators. [0003] In 100G and beyond 100G systems, the receiving end adopts coherent reception and digital signal processing technology (DSP), which can digitally compensate the dispersion and polarization mode dispersion (PMD) accumulated in the entire transmission process in the electrical domain; ...

AI Technical Summary

Problems solved by technology

This invention fails to obtain the optimal combination of fiber parameters (such as effective area, cut-off wavelength, etc.) and fiber manufacturing cost

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