Multi-core optical fiber for different application scenes and preparation method

A multi-core fiber, application scenario technology, applied in the direction of multi-core fiber, multi-layer core/clad fiber, clad fiber, etc., can solve the problems of unmentioned fiber bending performance, fiber stress distribution, etc., to avoid energy The effect of leakage, high production efficiency and ingenious design

Pending Publication Date: 2021-09-17
HENGTONG OPTICAL MATERIAL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Chinese invention patent CN108152879B proposes a multi-core optical fiber with controllable crosstalk, but the asymmetric structure will cause the internal stress distribution of the optical fiber, and the bending performance of the optical fiber is not mentioned

Method used

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  • Multi-core optical fiber for different application scenes and preparation method
  • Multi-core optical fiber for different application scenes and preparation method
  • Multi-core optical fiber for different application scenes and preparation method

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preparation example Construction

[0031] A method of preparing a multi-core fiber for different application scenarios, including the following steps:

[0032] The core and cladding are prepared, and the cladding is perforated, and then the plurality of cores are inserted into a plurality of wells of the cladding, and a core is inserted into a hole, and the wire drawing is performed to obtain the desired multi-core fiber.

[0033] The packet layer is first prepared from the VAD method (not limited to this process), and the punch is performed by high-precision punching equipment, the pore size is 10 ~ 30mm, the pore distance is 20 ~ 60mm, and the cladding The diameter is 50 ~ 120mm.

[0034] The bristle retaining core layer 1 radius A is 3.0 to 4.5 μm, the inner cladding layer 2 and the core layer 1 radius ratio B / A is 2.0 to 3.0, and the lower casing layer 3 and the core layer 1 radius ratio C / A is 3.0 to 4.0.

[0035] The spacing between adjacent two cores is 20 to 50 μm, the number of cores, and the adjacent ...

Embodiment 1

[0038] like Figure 1-2 As shown, a multi-core optical fiber for different application scenarios, an outer diameter of 125 μm, a four-core fiber composed of four cores and a cladding coated thereof, each core includes internally The core layer 1 (a radius is a), the inner clad layer 2 (B) and the lower cladding layer 3 (a radius C), the cladding of the width of the two-core fiber end surface structure of the adjacent core spacing of 40 μm It is made of high-precision hits, and the four cores are inserted into the four holes of the cladding, and then the wire draws the desired multi-core fiber.

[0039] After the bridler, the fiber 1550 nm attenuated ≤0.20, 1550 macro 1 lap (R = 10 mm) does not exceed 0.02 dB, reaching G.657.b3 standard.

[0040] After the brigadier, the core of the two cores of the fiber is not exceeding -50 dB.

Embodiment 2

[0042] like figure 1 with 3 As shown, a multi-core optical fiber for different application scenes, an outer diameter of 125 μm, a seven-core fiber composed of a seven core and a cladding coated thereof, each of which includes internal and external sequential The core layer 1 (a radius is a), the inner clad layer 2 (B) and the lower clavoration 3 (a radius C), the cladding is a seven-core optical fiber end face structure by the pure silicon core rod to 30 μm. The high-precision hit seven well is made, and the seven cores are inserted into the seven holes of the lower cladding layer 3, and then the bridal obtains the desired multi-core fiber.

[0043] After the bridler, the fiber 1550 nm attenuated ≤0.20, 1550 macro 1 lap (R = 10 mm) does not exceed 0.02 dB, reaching G.657.b3 standard.

[0044] After the brigadier, the core of the two cores of the fiber is not exceeding -50 dB.

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Abstract

The invention discloses a multi-core optical fiber for different application scenes and a preparation method thereof. The multi-core optical fiber with different inter-core crosstalk is designed and obtained by using a method for controlling the number of cores, the arrangement of the cores, the refractive index difference between the cores and the distance between the cores, and comprises the cores and a wrapping layer wrapping the outer parts of the cores. The refractive index difference value of each core is 0-1.5%, each core comprises a core layer, an inner cladding layer and a sunken cladding layer which are sequentially arranged from inside to outside, holes are formed in the cladding layers, and one core is inserted into each hole. In the multi-core optical fiber, the core number and the core spacing of the multi-core optical fiber are diversified, the core number, the core arrangement and the core spacing can be designed according to the use environment, and the refractive index difference exists among the core layer, the inner cladding layer and the sunken cladding layer. The inter-core crosstalk can be controlled through the inter-core refractive index difference value, the inter-core spacing, the width of the sunken cladding and the relative refractive index; so that the optical loss is reduced, and the bending performance of the optical fiber is effectively improved through the sunken cladding, the process is simple, and the production efficiency is high and stable.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and in particular relates to a multi-core optical fiber and a preparation method for different application scenarios. Background technique [0002] Although the traditional single-core optical fiber transmission technology has developed rapidly in the past few decades, a single optical fiber has achieved a transmission capacity of up to 100Tb / s. However, with the continuous development of 5G technology and the emergence of new services such as virtual reality and ultra-high-definition video, the amount of data in optical communication networks has further increased. Therefore, how to effectively expand the transmission capacity of optical fibers has become one of the problems that need to be solved urgently. Space-division multiplexing (SDM) technology has attracted more and more attention because it can further expand the communication capacity of optical fibers. At present,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G02B6/036C03B37/027
CPCG02B6/02042G02B6/03633C03B37/027
Inventor 胡景姚艳郑勇王明轩段晓峰和联科翟国华劳雪刚
Owner HENGTONG OPTICAL MATERIAL CO LTD
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