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Optical fiber of coupling multilayer rare earth blending ring-shaped fiber core with single-mold fiber core

A single-mode fiber core, rare-earth-doped technology, applied in the field of high-power fiber amplifiers, special fibers, and lasers, can solve the problems of high process requirements for large-mode field fibers, large connection loss of ordinary fibers, and limited single-mode laser power. Reduce manufacturing difficulty, improve heat resistance, and achieve the effect of high-power single-mode laser output

Inactive Publication Date: 2010-06-30
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the limitations of the existing single-mode fiber and multi-core fiber output single-mode laser power and with the increase of optical power, its heat resistance and other defects, as well as the existing large-mode-field fiber high process requirements, low yield, and Ordinary optical fiber has defects such as large connection loss, and the present invention provides an optical fiber with a single-mode fiber core coupled with a multi-layer rare earth-doped ring core

Method used

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  • Optical fiber of coupling multilayer rare earth blending ring-shaped fiber core with single-mold fiber core
  • Optical fiber of coupling multilayer rare earth blending ring-shaped fiber core with single-mold fiber core
  • Optical fiber of coupling multilayer rare earth blending ring-shaped fiber core with single-mold fiber core

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Experimental program
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Effect test

Embodiment 1

[0020] Single-mode core-coupled optical fiber with two layers of rare-earth ion-doped rectangular ring core, see figure 1 . The center of the optical fiber is a rare earth ion-doped core area 1, and outside the rare earth ion core area 1, the first silicon ring core 21, the first rare earth ion doped ring core 41, the second silicon ring core 22, and the second rare earth ion core area 1 are distributed from inside to outside. The ion ring core 42, the third silicon ring core 23, and the outer cladding layer 3; in this embodiment, N=2 optical fibers with N layers of rare earth ion-doped rectangular ring cores.

[0021] The rare earth ion types of the rare earth ion-doped core region 1 , the first rare earth ion-doped ring core 41 and the second rare earth ion-doped ring core 42 are all erbium ions.

[0022] The refractive indices of the rare earth ion-doped core region 1 , the first rare earth ion-doped ring core 41 and the second rare earth ion-doped ring core 42 are equal. ...

Embodiment 2

[0027] Single-mode core-coupled three-layer rare-earth ion-doped elliptical ring-core optical fiber, see figure 2 . The center of the optical fiber is a rare earth ion-doped core area 1, and outside the rare earth ion core area 1, the first silicon ring core 21, the first rare earth ion doped ring core 41, the second silicon ring core 22, and the second rare earth ion core area 1 are distributed from inside to outside. The ion ring core 42, the third silicon ring core 23, the third rare earth ion-doped ring core 43, the fourth silicon ring core 24, and the outer cladding 3; in this embodiment, the optical fiber with N layers of rare earth ion-doped elliptical ring cores is N=3.

[0028] The types of rare earth ions doped in the rare earth ion-doped core region 1 , the first rare earth ion-doped ring core 41 , the second rare earth ion-doped ring core 42 , and the third rare earth ion-doped ring core 43 are holmium ions.

[0029] The refractive indices of the rare earth ion d...

Embodiment 3

[0034] Optical fiber with a single-mode core coupled to a five-layer rare earth ion-doped toroidal core, see image 3 . The center of the optical fiber is a rare earth ion-doped core area 1, and outside the rare earth ion core area 1, the first silicon ring core 21, the first rare earth ion doped ring core 41, the second silicon ring core 22, and the second rare earth ion core area 1 are distributed from inside to outside. Ion ring core 42, third silicon ring core 23, third rare earth ion ring core 43, fourth silicon ring core 24, fourth rare earth ion ring core 44, fifth silicon ring core 25, fifth rare earth ion ring core The core 45, the sixth silicon ring core 26, and the outer cladding 3; in this embodiment, the optical fiber with N layers of rare earth ion-doped ring cores has N=5.

[0035] Rare earth ion doped core area 1, first rare earth ion doped ring core 41, second rare earth ion doped ring core 42, third rare earth ion doped ring core 43, fourth rare earth ion do...

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Abstract

The invention relates to an optical fiber of coupling a multilayer rare earth blending ring-shaped fiber core with a single-mold fiber core, belonging to high-power optical fiber amplifiers, lasers and special fibers; a rare earth blending ion core area (1) is arranged at the center of the optical fiber, a first silicon ring core (21), a first rare earth blending ion ring core (41), ...(N+1)th silicon ring core (2, N+1), and a coating layer (3) are sequentially arranged from inwards to outwards, wherein, N is more than or equal to 2 and is less than or equal to 50; the refractive indexes of the rare earth blending ion core area, the first rare earth blending ion ring core, ...and the Nth rare earth blending ion ring core (4N) are equal, the refractive indexes of the first silicon ring core, ...and the (N+1)th silicon ring core are equal, the refractive indexes of the first silicon ring core (21), ...and the (N+1)th silicon ring core are lower than the refractive indexes of the rare earth blending ion core area, the first rare earth blending ion ring core, ...and the Nth rare earth blending ion ring core; the refractive index of the coating layer is lower than the refractive indexes of the first silicon ring core, ...and the (N+1)th silicon ring core (2, N+1), the manufacturing difficulty of the optical fiber is reduced, and large and effective mold area of the optical fiber is realized.

Description

technical field [0001] The invention relates to an optical fiber with a single-mode fiber core coupled with a multi-layer rare-earth-doped annular fiber core, which belongs to the fields of high-power optical fiber amplifiers, lasers and special optical fibers. Background technique [0002] Rare earth-doped fiber amplifiers or lasers use ion fibers doped with rare earth elements (Nd, Sm, Ho, Er, Pr, Tm, Yb, etc.), and use the stimulated emission mechanism to achieve direct amplification of light. [0003] With its excellent performance and low price, fiber laser has been widely used in optical fiber communication, industrial processing, medical treatment, military and other fields. Although a single-mode laser with a single fiber output exceeding 1kW has been achieved in the laboratory, and the realization of this laser requires strict conditions, it is difficult for engineering applications; but with the development of laser technology applications, as well as material proc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067
Inventor 胡旭东宁提纲裴丽周倩张帆王春灿郑晶晶谭中伟刘艳
Owner BEIJING JIAOTONG UNIV
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