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Expanded core fiber

A core optical fiber and optical fiber technology, applied in the direction of cladding optical fiber, optical waveguide light guide, etc., can solve the problems of inability to phase fusion, the core diameter is very different, the increase of users, etc., to achieve cost saving, convenient use, reduction of photoelectric and electro-optical Effects of converted devices

Active Publication Date: 2011-03-30
NANTONG GUQIAO NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the rapid development of the communication industry, the field of optical fiber application continues to expand, and the types of optical fibers used are also different. In local area networks, multimode optical fibers are generally used due to consideration of equipment costs and other factors; Single-mode optical fibers are used on the Internet; therefore, when the signals in the LAN are output to the outside, due to different types of optical fibers, the core diameters vary greatly, so they cannot be fused together; for this reason, it is necessary to transfer the optical signals in the LAN It is first converted into an electrical signal, and then the electrical signal is converted into an optical signal and output to the single-mode optical fiber. Therefore, it adds a huge cost to the user

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] See Figure 1 to Figure 3 , a core-expanded optical fiber, comprising a core, a cladding 2 coated outside the core, and a coating 3 coated outside the cladding, characterized in that: the core includes a small core diameter portion 11 , a transitional core portion 12 connected to one end of the small core portion, and a large core portion 13 connected to the other end of the transitional core portion; the cross-sectional shape and size of the connection between the small core portion and the transitional core portion are the same, The cross-sectional shape and size of the connection between the large core diameter part and the transition core diameter part are the same; the cross-sectional diameter of the connection between the small core diameter part and the transition core diameter part is smaller than the cross section of the connection between the large core diameter part and the transition core diameter part Diameter; the refractive index of the core material is s...

Embodiment 2

[0020] Please refer to Figure 1 to Figure 3 , a core-expanded optical fiber, basically the same as Embodiment 1, except that: the diameter of the small core diameter part is: 7.5-10.5 μm; and the diameter of the large core diameter part is: 57.5-67.5 μm; the transition The length of the core diameter part is 250 meters.

Embodiment 3

[0022] Please refer to Figure 1 to Figure 3 , an expanded-core optical fiber, basically the same as Embodiment 1, the difference is that: the diameter of the small core diameter part is: 45-55 μm; and the diameter of the large core diameter part is: 57.5-67.5 μm; The transitional core diameter part is non-cylindrical frustum shape, and the outer edge is composed of curves; the length of the transitional core diameter part is 500 meters.

[0023] The core-expanded optical fiber described in any of the above implementation examples is characterized in that: the diameter of the small core diameter part is 7.5-10.5 μm; and the diameter of the large core diameter part is 45-55 μm.

[0024] The core-expanded optical fiber described in any of the above implementation examples is characterized in that: the diameter of the small core diameter part is: 7.5-10.5 μm; and the diameter of the large core diameter part is: 57.5-67.5 μm.

[0025] The core-expanded optical fiber described in ...

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Abstract

The invention relates to an expanded core fiber belonging to the technical field of fibers. The expanded core fiber comprises a fiber core, an envelope and a coating layer. The expanded core fiber is characterized in that the fiber core comprises a small core diameter part, a transition core diameter part and a large core diameter part, wherein the cross sections positioned on the connecting position of the small core diameter part and the transition core diameter part are same, and the cross sections positioned on the connecting position of the large core diameter part and the transition core diameter part are same; the diameters of the cross sections positioned on the connecting position of the small core diameter part and the transition core diameter part are smaller than those of the cross sections positioned on the connecting position of the large core diameter part and the transition core diameter part; the refractive index of the fiber core is lower than that of the envelope, and the refractive index of the envelope is lower than that of the coating layer; the outer diameter of the longitudinal section of an optical shaft is sequentially enlarged from the small core diameter part to the large core diameter part; the diameter of the small core diameter part is same, and the diameter of the large core diameter part is same; the small core diameter part, the transition core diameter part and the large core diameter part are integrally formed; and the fiber is in an integral structure. The invention has the advantages of reducing the photoelectric and electro-optical conversion equipment, greatly reducing the cost, and is convenient and easy to use and produce.

Description

technical field [0001] The invention belongs to the technical field of optical fibers and relates to optical fibers with different core diameters in the same optical fiber. Background technique [0002] Optical communication, as one of the main means of modern communication, has been paid more and more attention by people, and has been applied in various technical fields. For this reason, various optical fibers are widely used. Due to the principle of total reflection, optical fibers can The light is transmitted along the wire like a current. Since the optical fiber is mainly made of high-purity quartz glass, it has good anti-interference performance, no electrical radiation, high communication quality, low transmission attenuation, small and thin quality, and is not afraid of Corrosion, easy laying, stable and reliable, strong confidentiality and other advantages; for this reason, in 2009, the Nobel Prize in Physics was awarded to the founder of the invention of optical fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
Inventor 方亚琴蒋菊生
Owner NANTONG GUQIAO NEW ENERGY TECH CO LTD