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Laser shaping optical fiber and preparation method and application thereof

A laser shaping and optical fiber technology, applied in cladding optical fiber, optical waveguide light guide, glass manufacturing equipment, etc., can solve the problems of poor batch consistency, unstable laser shaping effect, high defective rate, etc., to improve consistency and improve Homogenization effect, effect of improving precision

Active Publication Date: 2022-04-15
YANGTZE OPTICAL FIBRE & CABLE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a laser shaping optical fiber, its preparation method and application. impurity area, thereby reducing the technical problems of increased processing difficulty due to the asymmetric doped area and the design of the non-circular glass part, the final laser shaping effect is unstable, the consistency between batches is poor, and the defective rate is high.

Method used

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  • Laser shaping optical fiber and preparation method and application thereof
  • Laser shaping optical fiber and preparation method and application thereof
  • Laser shaping optical fiber and preparation method and application thereof

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preparation example Construction

[0056] The invention also discloses a method for preparing a laser shaped optical fiber, which includes the following steps:

[0057] (1) On the base rod having a circular cross-section for forming the fiber core, a cold working process is used to form first and second through holes symmetrical to the center of the base rod; when the base rod is circular , the processing is the most convenient, especially the positioning of the subsequent punching step, so when the fiber core is circular, its base rod can only be used to form a circular core rod, or it can be used to form a fiber core and at least A base rod with a circular cross-section for part of the cladding; when the optical fiber is a non-circular core, it is preferred to use a base rod with a circular cross-section for forming the core and at least part of the cladding, for example When the core is designed to be non-circular, the shaped mandrel is nested and sintered in advance with the liner used to form at least part...

Embodiment 1

[0070] A laser shaping optical fiber is a multimode optical fiber, and its glass part with a circular cross section includes: a core and a cladding from the inside to the outside; the structure is as figure 1 Shown:

[0071] The core is circular, and the diameter of the circular cross-section of the circular core is 200 μm. The geometric central axis of the core or the central axis of the core precursor circle coincides with the geometric central axis of the fiber or is laterally offset by 5 μm.

[0072] The fiber core includes first and second doped regions that are symmetrical about the geometric center of the fiber core; the cross section of the doped region is circular, and the distance between the first and the second doped region is 45 μm; the first The total area of ​​the two doped regions and the second one accounts for 20% of the total area of ​​the core.

[0073] The first doped region and the second doped region have different refractive index distributions. The i...

Embodiment 2

[0086] A laser shaping optical fiber is a multimode optical fiber, and its glass part with a circular cross section includes: a core and a cladding from the inside to the outside; the structure is as figure 2 Shown:

[0087] The core is circular, and the diameter of the circular cross-section of the circular core is 105 μm. The geometric central axis of the core or the central axis of the core precursor circle coincides with the geometric central axis of the fiber or is laterally offset by 5 μm.

[0088] The fiber core includes first and second doped regions that are symmetrical about the geometric center of the fiber core; the cross section of the doped region is annular, and the distance between the first and second doped regions is 20 μm; the first and The total area of ​​the second two doped regions accounts for 10% of the total area of ​​the fiber core.

[0089] The first doped region and the second doped region have different refractive index distributions. The interi...

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Abstract

The invention discloses a laser shaping optical fiber and a preparation method and application thereof. According to the laser shaping optical fiber, a glass part with a circular cross section sequentially comprises a fiber core and a cladding from inside to outside; the fiber core comprises a first doped region and a second doped region which are geometrically symmetrical; the first doped region and the second doped region have different refractive index formations. According to the laser shaping optical fiber provided by the invention, on the basis of keeping the asymmetric refractive index design, through the geometrically symmetric doped region design, the homogenization effect is ensured, the symmetry of stress distribution is improved, the structural defects of the optical fiber caused by asymmetric stress distribution are reduced, and the performance of the optical fiber is improved. And the problems of temperature rise and loss of the laser shaping optical fiber caused by structural defects of the optical fiber are solved. Besides, in order to cooperate with a mature processing technology, a glass part with a circular cross section is designed, so that processing defects during formation of a doped region are reduced, the precision of an optical fiber size processing technology is improved, the doped region designed in geometric symmetry is matched, the optical fiber size precision is higher, and the consistency of product batches is improved.

Description

technical field [0001] The invention belongs to the field of optics and laser optoelectronics, and more specifically relates to a laser shaping optical fiber, its preparation method and application. Background technique [0002] With the rapid development of optical fiber communication technology, the use of optical fiber is becoming more and more extensive. In recent years, optical fiber has not only been widely used in the field of conventional communication, but also in the field of industrial laser. Applications such as compensating the gain stepping effect of lasers urgently need special structural fibers with high damage resistance threshold and good spot homogenization effect, and shaping the laser spot is the development direction. For example, in laser welding applications, in order to obtain excellent welding quality and prevent spatter, it is usually necessary to make the heating point near the processing point uniform, which requires uniform laser power density. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02G02B27/09C03B37/027
CPCY02P40/57
Inventor 李粲黎宇陈章汝卢涛曹蓓蓓喻建刚孟悦
Owner YANGTZE OPTICAL FIBRE & CABLE CO LTD
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