Low-dispersion single-mode optical fiber

Abstract

The invention relates to a low-dispersion single-mode optical fiber, which comprises a core layer and a cladding, and is characterized in that the radius R1 of the core layer ranges from 3 to 5 microns, and a relative refractive index difference delta 1 of the core layer ranges from 0.15% to 0.45%; the cladding sequentially comprises a first sunken cladding, a protruding cladding, a second sunkencladding and an outer cladding from inside to outside; the unilateral width (R2-R1) of the first sunken cladding ranges from 2 to 7 mu m, a relative refractive index difference delta 2 ranges from -0.4% to -0.03%; the unilateral width (R3-R2) of the convex cladding ranges from 2 to 7 mu m, a relative refractive index difference delta 3 ranges from 0.05% to 0.20%, the unilateral width (R4-R3) of the second sunken cladding ranges from 0 to 8 mu m, and a relative refractive index difference delta 4 ranges from 0% to -0.2%; and the outer cladding is a pure silicon dioxide glass layer. The low-dispersion single-mode optical fiber has reasonable design of the core cladding, is convenient in process control, is compatible with an existing G.652 optical fiber, and can have low dispersion in the wave band of 1270-1380 nm.

Description

technical field [0001] The invention relates to a low-dispersion single-mode optical fiber, which belongs to the technical field of optical communication. Background technique [0002] The working range of the 5G fronthaul color light solution is within 1271-1371nm, while the dispersion of traditional G.652 single-mode fiber in the 1351-1371nm band is relatively large, and the transmission power cost is slightly higher, so APD high-sensitivity detectors are required to detect For power compensation, the cost of APD is much higher than that of PIN detectors. Other optical fibers, such as dispersion-flat optical fiber, non-zero dispersion-shifted single-mode fiber, and low-slope non-zero dispersion-shifted single-mode fiber, etc., are optimized for dispersion in the range of 1450nm to 1600nm, which cannot meet the requirements of 5G fronthaul colored light solutions. Therefore, preparing a new type of single-mode fiber compatible with the existing G.652 fiber and having low d...

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Problems solved by technology

[0002] The working range of the 5G fronthaul color light solution is within 1271-1371nm, while the dispersion of traditional G.652 single-mode fiber in the range of 1351-1371nm is relatively large, and the transmission power cost is slightly higher, so APD high-sensitivity detectors are required to detect Do power compensation, and the cost of APD is much higher than PIN detector

Other optical fibers, such as dispersion-flat optical fiber, non-zero dispersion-shifted single-mode fiber, and low-slope non-zero dispersion-shifted single-mode fiber, etc., are optimized for dispersion in the range of 1450nm to 1600nm, which cannot meet the requirements of 5G fronthaul colored light solutions.

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