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A single-mode fiber and multi-core 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

Active Publication Date: 2021-04-20
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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  • A single-mode fiber and multi-core fiber coupler
  • A single-mode fiber and multi-core fiber coupler
  • A single-mode fiber and multi-core 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, belonging to the technical field of optical fibers. The single-mode optical fiber includes a core, a first outer cladding, a depressed outer cladding, and a mechanical cladding arranged in sequence from the inside to the outside, and the refractive index inside each is uniformly distributed; the refractive index at the interface between the core and the first outer cladding changes abruptly , the refractive index at the interface between the depressed outer cladding and the mechanical cladding changes abruptly, and the refractive index of the depressed outer cladding is smaller than that of the mechanical cladding. The fiber coupler includes a sleeve and a single-mode fiber. The single-mode fiber is nested in the sleeve and one end of the sleeve is tapered; one end of the sleeve is used to fuse with the multi-core fiber; The single-mode optical fibers are fused with the corresponding standard single-mode optical fibers respectively, and the invention solves the problem of large loss of the existing multi-core optical fiber coupler.

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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Patent Type & Authority Patents(China)
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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