Large mode field area single-mode chrysanthemum fiber core distribution fiber and manufacturing method thereof

A technology for distributing optical fibers and large mode fields, applied to multi-layer core/clad optical fibers, clad optical fibers, glass fiber products, etc. Low efficiency and other problems, to save manufacturing costs, facilitate heat dissipation, and reduce splice loss

Inactive Publication Date: 2012-01-04
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the defects of low mass production yield of multi-core fiber used in existing large mode field single-mode fiber lasers and limited core diameter of segmented cladding fiber, a large mode field area single-mode chrysanthemum core distributed fiber is proposed. its production method

Method used

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  • Large mode field area single-mode chrysanthemum fiber core distribution fiber and manufacturing method thereof
  • Large mode field area single-mode chrysanthemum fiber core distribution fiber and manufacturing method thereof
  • Large mode field area single-mode chrysanthemum fiber core distribution fiber and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0034] Large mode field area single-mode chrysanthemum core distribution fiber with three fan-shaped cores, such as figure 1 As shown, the optical fiber includes a circular core 1 with a diameter of 2 microns, an inner cladding 3 and an outer cladding 4 . Three fan-shaped cores with the same radius and radian are evenly distributed around the circular core 1 in the inner cladding 3, and the three fan-shaped cores are respectively recorded as the first fan-shaped core 21, the second fan-shaped core 22, and the third fan-shaped core. twenty three.

[0035] The apex of the first fan-shaped fiber core 21, the second fan-shaped fiber core 22, and the third fan-shaped fiber core 23 are equal to the distance from the outer circle of the circular fiber core 1, and the distance is 2 microns; the first fan-shaped fiber core 21, the second fan-shaped fiber core The radii of the core 22 and the third fan-shaped core 23 are both 20 microns, and the radians are both 2π / 3.

[0036] The opt...

Embodiment 2

[0047] Large mode field area single-mode chrysanthemum core distribution fiber with four sector cores, such as figure 2 As shown, the optical fiber includes a circular core 1 with a diameter of 3 microns, an inner cladding 3 and an outer cladding 4. In the inner cladding 3, 4 fan-shaped cores with the same radius and arc are evenly distributed around the circular core 1, and 4 The sector cores are denoted as the first sector core 21 , the second sector core 22 , the third sector core 23 , and the fourth sector core 24 .

[0048] The apex of the first fan-shaped fiber core 21, the second fan-shaped fiber core 22, the 3rd fan-shaped fiber core 23, and the fourth fan-shaped fiber core 24 are equal to the distance from the outer circle of the circular fiber core 1, and the distance is 3 microns; the first fan-shaped The radii of the fiber core 21 , the second fan-shaped fiber core 22 , the third fan-shaped fiber core 23 , and the fourth fan-shaped fiber core 24 are all 30 microns...

Embodiment 3

[0059] Large mode field area single-mode chrysanthemum core distribution fiber with five fan-shaped cores, such as image 3 As shown, the optical fiber includes a circular core 1 with a diameter of 4 microns, an inner cladding 3 and an outer cladding 4. In the inner cladding 3, 5 fan-shaped cores with the same radius and arc are uniformly distributed around the circular core 1, and 4 The sector cores are denoted as the first sector core 21 , the second sector core 22 , the third sector core 23 , the fourth sector core 24 , and the fifth sector core 25 .

[0060] The apex of the first fan-shaped fiber core 21, the second fan-shaped fiber core 22, the 3rd fan-shaped fiber core 23, the 4th fan-shaped fiber core 24, and the fifth fan-shaped fiber core 25 are equal to the distance from the outer circle of the circular fiber core 1. is 4 microns; the radius of the first fan-shaped fiber core 21, the second fan-shaped fiber core 22, the third fan-shaped fiber core 23, the fourth fan-...

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Abstract

The invention discloses a large mode area single-mode chrysanthemum fiber core distribution fiber and a manufacturing method thereof, and belongs to the field of high-power broadband fiber amplifiers, lasers and special fibers. The large mode field area single-mode chrysanthemum fiber core distribution fiber overcomes the defects of low bulk production yield of the existing large mode field single-mode fiber, limited core layer diameter of partitioning cladded-fiber and the like. N fan-shaped fiber cores with same diameters and radians are uniformly distributed around a circular core in an inner cladding of the fiber, and are recorded as the first fan-shaped fiber core to the Nth fan-shaped fiber core, wherein N is an integer more than or equal to 3 and less than or equal to 32. The manufacturing method comprises the following steps of: selecting two same rare earth ion-doped type fiber preforms; removing claddings of the two fiber preforms by only leaving core areas; drawing one of the fiber preforms into a round thin rod; processing the other one of the fiber preforms into N fan-shaped thin rods with same semi-diameters and radians; constituting the round thin rod and the N fan-shaped thin rods, sleeving a quartz tube on the thin rods, and filling the gap with thin quartz rods; and drawing the large mode field area single-mode chrysanthemum fiber core distribution fiber.

Description

technical field [0001] The invention relates to a large mode field area single-mode chrysanthemum core distributed optical fiber and a manufacturing method thereof, belonging to the fields of high-power broadband optical fiber amplifiers, lasers and special optical fibers. Background technique [0002] Rare-earth-doped fiber lasers use rare-earth element-doped ion fibers to generate laser light through the mechanism of stimulated radiation. [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. With the development of laser technology applications, material processing, space communication, laser radar, photoelectric countermeasures, laser weapons, etc., high-power, high-quality lasers are required, and the single-mode output power is required to reach MW or even GW levels. However, the double-clad rare-earth-doped fiber laser that only uses a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/036G02B6/02C03B37/012C03B37/025
CPCC03B2203/29C03B37/01222C03B2203/12C03B2203/34C03B2201/34Y02P40/57
Inventor 胡旭东宁提纲裴丽温晓东李晶王春灿杨龙
Owner BEIJING JIAOTONG UNIV
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