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Gradual refractive index bending resistant multimode optical fiber

A graded-index, multi-mode optical fiber technology, applied in the field of optical communication, can solve the problems of reducing optical fiber bandwidth and distortion, and achieve the effects of reducing refractive index distortion, reducing additional attenuation, and improving bending resistance

Inactive Publication Date: 2012-09-26
EVERPRO TECH COMPANY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Many documents, including the patent CN183049C, only focus on how to prepare a preform with a precise refractive index profile. However, during the drawing process of the preform, the residual stress and the diffusion of the components make the refractive index of the optical fiber better than that of the preform. Great distortion, which reduces the bandwidth of the fiber

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  • Gradual refractive index bending resistant multimode optical fiber
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  • Gradual refractive index bending resistant multimode optical fiber

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Embodiment Construction

[0039] The following detailed examples are given to further illustrate the present invention, so that the application scope of the present invention is more obvious. In the table, R1 is the radius of the core layer, R2 is the radius of the inner cladding, R3 is the radius of the middle cladding, and R4 is the radius of the outer cladding.

[0040]

[0041] Through comparative tests, the bending loss of the bending-resistant multimode optical fiber designed and manufactured by adopting the solution of the present invention is significantly lower than that of the same type of conventional multimode optical fiber under various test conditions.

[0042] At the same time, the first inner cladding layer co-doped with F and Ge designed in the present invention can significantly withstand the additional stress from the preform rod to the fiber drawing process during the optical fiber manufacturing process, thereby reducing the parabolic distortion of the obtained optical fiber cor...

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Abstract

The invention relates to a gradual refractive index bending resistant multimode optical fiber, which includes a sandwich layer and a cladding, and is characterized in that the radius of the sandwich layer is 20 to 50 microns; the refractive index of the sandwich layer is distributed in a gradient gradation type, the distribution power exponent Alpha is 1.89 to 1.97, and the maximum relative refringence delta 1% max of the sandwich layer is 0.9% to 2.72%; the inner cladding is arranged adjacent to the sandwich layer, the radius of the inner cladding is 22 to 57 microns, and the relative refringence delta 2% is minus 0.02% to 0.02%; and a middle cladding and an outer cladding are arranged outwards the inner cladding sequentially, the middle cladding is a pure quartz glass layer, the radius of the middle cladding is 32 to 60 microns, the relative refringence delta 3% is minus 0.01% to 0.01%. The gradual refractive index bending resistant multimode optical fiber provided by the invention not only reduces the bending dissipation of the optical fiber, but also guarantees that optical fiber has high transmission bandwidth at a 1300 nm window, effectively improves the light collection and concentration capabilities of the optical fiber to LEDs, VCSELs or LDs through increasing the core diameter and numerical aperture, and improves the coupling fault-tolerant capability of luminous devices, namely between the light source and the light transmitting device, i.e. between optical fibers.

Description

Technical field [0001] The present invention involves a gradient refractive index multimodal optical fiber applied in the 1300nm transmission window optimization in a data signal transmission, optical fiber sensing, and optical devices. This optical fiber not only has good bending performance, but also has easy coupling and light power distribution of light sources and uniformity of light power distribution., In the 1300Nm window, which has high bandwidth, belongs to the field of optical communication technology. Background technique [0002] Fiber communication begins with the invention and application of multi -mode fiber.In the past ten years, although single -mode optical fiber has become the most important variety in the optical fiber market, multi -mode fiber has never been replaced, but has always maintained a stable growth market demand.It can meet the use of light signals, energy transmission, LAN data transmission and optical devices.At present, the cost of the multi -m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/036G02B6/028
CPCG02B6/036G02B6/03644G02B6/028G02B6/0288G02B6/0281
Inventor 汪松周志攀刘永涛徐进范明峰张树强王伟
Owner EVERPRO TECH COMPANY
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