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Single-mode optical fiber and multi-core optical fiber coupler

A multi-core optical fiber and single-mode technology, which is applied in the coupling of optical waveguides, clad optical fibers, multi-layer core/clad optical fibers, etc., can solve the problems of large fusion splicing loss and achieve high yield and small crosstalk between cores , to avoid the effect of field leakage

Active Publication Date: 2020-06-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the defects of the existing technology, the present invention aims to solve the technical problem that the existing multi-core fiber coupler is affected by the optical fiber used in the preparation process, resulting in large fusion splice loss

Method used

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  • Single-mode optical fiber and multi-core optical fiber coupler
  • Single-mode optical fiber and multi-core optical fiber coupler
  • Single-mode optical fiber and multi-core optical fiber coupler

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Embodiment

[0047] The parameters selected for the preparation of single-mode fiber in this embodiment are shown in the table:

[0048] Table 1

[0049] Radius (μm) Relative refractive index difference (%) Fiber core 4.5 0.355 first outer cladding 17.1 -0.03 sunken outer cladding 23.7 -0.62 mechanical cladding 39.6 -0.04

[0050] After the single-mode optical fiber is prepared based on the above parameters, it is measured by experiments that the single-mode optical fiber has a bending radius of 3mm, a macrobending loss of less than 0.2dB / turn at a wavelength of 1310nm, and a macrobending loss of less than 0.5dB / turn at a wavelength of 1550nm.

[0051] A multi-core fiber coupler was prepared based on the above-mentioned single-mode fiber through tapering, and the multi-core fiber coupler was tested based on the prepared multi-core fiber coupler, and the fusion loss of the multi-core fiber coupler, single-mode fiber and multi-core fiber was meas...

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Abstract

The invention discloses a single-mode optical fiber and a multi-core optical fiber coupler, which belong to the technical field of optical fibers. The single-mode optical fiber comprises a fiber core,a first outer cladding layer, a sunken outer cladding layer and a mechanical cladding layer which are sequentially arranged from inside to outside, wherein refractive indexes in the fiber core, the first outer cladding layer, the sunken outer cladding layer and the mechanical cladding layer are uniformly distributed; the refractive index of the interface of the fiber core and the first outer cladding changes suddenly, the refractive index of the interface of the sunken outer cladding and the mechanical cladding changes suddenly, and the refractive index of the sunken outer cladding is smallerthan that of the mechanical cladding. The optical fiber coupler comprises a sleeve and a single-mode optical fiber, the single-mode optical fiber is nested in the sleeve, and one end of the sleeve istapered; one end of the sleeve tapering is used for being welded with the multi-core optical fiber; and each single-mode optical fiber in the non-tapering end is respectively welded with the corresponding standard single-mode optical fiber. The problem of large loss of the existing multi-core optical fiber coupler is solved.

Description

technical field [0001] The invention belongs to the field of optical fiber technology, and more specifically relates to a single-mode optical fiber and a multi-core optical fiber coupler. Background technique [0002] With the increasing maturity and popularization of Internet technology, people's demand for data is increasing, which is close to the transmission capacity limit of the existing traditional single-mode fiber technology, and the multi-core fiber can effectively improve the fiber space utilization by greatly improving Increasing the transmission capacity of a single optical fiber is considered to be the key technology for realizing ultra-large capacity transmission in the future. In order to put the multi-core fiber into application more conveniently, a fan-in and fan-out device that guides the optical signal from the multi-core fiber to an independent single-core fiber is essential. Therefore, the multi-core optical fiber coupler and the optical fiber for prepa...

Claims

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Application Information

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IPC IPC(8): G02B6/036G02B6/255
CPCG02B6/0365G02B6/2551G02B6/2552
Inventor 唐明郭显聪甘霖付松年
Owner HUAZHONG UNIV OF SCI & TECH
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