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Bending-resistant large core high numerical aperture multimode fiber

A high numerical aperture, multimode optical fiber technology, applied in the direction of multi-layer core/clad optical fiber, graded index core/clad optical fiber, clad optical fiber, etc., can solve the problem that cannot fully meet the high bandwidth of data transmission Requirements and other issues to achieve the effect of increasing bandwidth, increasing numerical aperture, and improving bending resistance

Active Publication Date: 2011-09-21
EVERPRO TECH COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing multimode fiber cannot fully meet the requirements of high bandwidth for data transmission.

Method used

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  • Bending-resistant large core high numerical aperture multimode fiber
  • Bending-resistant large core high numerical aperture multimode fiber
  • Bending-resistant large core high numerical aperture multimode fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The design of the core layer and each cladding layer is as attached figure 1 , 3 As shown, a group of preforms were prepared and drawn by using the manufacturing method of the present invention at a drawing speed of 600 m / min. The structure and main performance parameters of the optical fiber are shown in Table 1.

[0040] Table 1

[0041]

Embodiment 2

[0043] The design of the core layer and each cladding layer is as attached figure 2 As shown, a group of preform rods were prepared and drawn using the manufacturing method of the present invention at a drawing speed of 600 m / min. The structure and main performance parameters of the optical fiber are shown in Table 2.

[0044] Table 2

[0045]

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Abstract

The invention relates to a bending-resistant large core high numerical aperture multimode fiber used for data transmission and optical devices. The bending-resistant large core high numerical aperture multimode fiber comprises a core and a cladding which coats the core. The bending-resistant large core high numerical aperture multimode fiber is characterized in that: the radius R1 of the core is 28 to 50 microns; a refractive index section of the core has a parabola shape; alpha is 1.9 to 2.2, and the maximum relative refractivity delta 1 percent max is 1.9 to 2.5 percent; the cladding outside the core is an inner cladding and / or a sunken inner cladding, and an outer cladding in sequence from inside to outside, and the radius R2 of the inner cladding is 28 to 55 microns, and the relative refractivity delta 2 percent is -0.1 to 0.1 percent; and the radius R3 of the sunken inner cladding is 28 to 60 microns, and the relative refractivity delta 3 percent is -0.15 to 0.8 percent. The bandwidth and the numerical aperture of the multimode fiber are increased, so that the light gathering capacity of the fiber is improved greatly and the multimode fiber is easier to couple with a light-emitting diode (LED) light source; the macro bending attached attenuation of the fiber is reduced obviously; the bending resistance of the fiber is improved; and the optical power transmission performance is intensified.

Description

technical field [0001] The invention relates to a bending-resistant large-core-diameter high-numerical-aperture multimode optical fiber used in data transmission and optical devices. The optical fiber not only has good bending resistance and is easy to couple with LED light sources, but also has a high bandwidth. The invention belongs to the technical field of optical data transmission. Background technique [0002] The entry of optical fiber into the practical stage begins with multimode optical fiber. In recent years, although new varieties of single-mode fiber have emerged, the use of functions has been continuously enriched and enhanced, and the performance-price ratio has been continuously improved, multimode fiber has not been replaced but has always maintained a stable growth rate. market share , the reason is that multimode fiber has many characteristics that single-mode fiber does not have, which meets the requirements of LAN fiber. [0003] Compared with long-dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/036G02B6/028
CPCG02B6/03627G02B6/02G02B6/0288G02B6/036G02B6/0365G02B6/028
Inventor 张树强刘泳涛汪松何珍宝徐进
Owner EVERPRO TECH COMPANY
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