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A seven-core small-diameter single-mode optical fiber and its manufacturing method

A technology of single-mode optical fiber and single optical fiber, which is applied in the field of optical communication, can solve problems such as difficult control of alignment accuracy, difficulty in large-scale production, and difficulty in forming holes in clad master rods, and achieves simple and effective manufacturing methods. Low cost and the effect of suppressing pattern leakage

Active Publication Date: 2021-03-16
SICHUAN LEFEI OPTOELECTRONICS TECH CO LTD
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  • Application Information

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Problems solved by technology

However, in this scheme, it is more difficult to form holes on the cladding mother bar, and the arrangement accuracy is difficult to control, and large-scale production is a problem

Method used

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  • A seven-core small-diameter single-mode optical fiber and its manufacturing method
  • A seven-core small-diameter single-mode optical fiber and its manufacturing method
  • A seven-core small-diameter single-mode optical fiber and its manufacturing method

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] It includes 7 single-mode optical fibers 1 with the same core cladding structure, and the 7 optical fibers are tightly combined, one of which is located in the center of the entire optical fiber, and the remaining 6 optical fibers are closely surrounded by the outer periphery of the central optical fiber. The single-mode optical fiber includes: A core layer and a cladding layer, the cladding layer includes an inner cladding layer, a depressed cladding layer and an outer cladding layer from the inside to the outside, and the diameter of the outer cladding layer is about 42 μm. Among them, the core layer and the inner cladding layer are germanium-fluorine co-doped silica glass layers, the sunken cladding layer is pure fluorine-doped silica glass layer, and the outer cladding layer is a mechanical outer cladding layer of non-doped silica g...

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Abstract

The invention relates to a seven-core small-diameter single mode fiber. The seven-core small-diameter single mode fiber comprises seven single-mode fibers having the same core cladding structure, wherein the seven fibers combined together closely, one fiber located at the center of the fibers, and the other six fibers surround the periphery of the center fiber; the single-mode fiber comprises a core layer and a cladding layer, the cladding layer comprises an inner cladding layer, a sunken cladding layer and an external cladding layer from the inside to the outside, radius r4 of the external cladding layer is 20-25 microns, ratio r4 / r1 of the radius of the external cladding layer to the radius of the core layer is 5.1-5.5, ratio r4 / r2 of the radius of the external cladding layer to the radius of the inner cladding layer is 2.4-2.8, and ratio r4 / r3 of the radius of the external cladding layer to the radius of the sunken cladding layer is 1.6-2.0. With the fiber provided by the invention,external diameter of the multi-core fiber is reduced greatly, and communication capacity density of unit cross section of the fiber is improved remarkably; consequently, space resource for paving pipelines is reduced; meanwhile, signal crosstalk influence among different fiber units is eliminated. The fiber provided by the invention has excellent comprehensive performance parameters, such as wavelength, mode field, attenuation and chromatic dispersion, in application wavebands, has microbending loss which is small enough. The fiber provided by the invention can be produced through a simple and convenient manufacturing method and needs low manufacturing cost.

Description

technical field [0001] The invention relates to a seven-core small-diameter single-mode optical fiber and a manufacturing method thereof, belonging to the technical field of optical communication. Background technique [0002] In the field of optical communication, the capacity of voice, digital and video communication is increasing year by year. In order to meet the needs of high-capacity communication, a current solution is usually to increase the laying density of regular-sized optical fibers, which not only increases the laying space resources. Requirements, but also increase the cost of optical connections between optical fibers, especially in FTTx applications, urban pipeline resources are very scarce. Under the same laying space resources, increasing the transmission capacity of a single optical fiber is a very important solution. In a known method, in order to avoid increasing the laying quantity of a single optical fiber, with a size of 250 microns of a conventiona...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G02B6/036C03B37/025C03C25/50C03C25/26
CPCC03B37/025C03B2205/32C03C25/50G02B6/02G02B6/02004G02B6/02042G02B6/0365
Inventor 吴超张磊拉吉·马泰罗杰毛明峰
Owner SICHUAN LEFEI OPTOELECTRONICS TECH CO LTD
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