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Peripheral multi-sector core optical fiber of circular core multi-sector area and manufacturing method thereof

A fan-shaped area and optical fiber prefabricated rod technology, which is applied to multi-layer core/clad optical fibers, clad optical fibers, glass fiber products, etc. To withstand the limited optical power and other issues, to achieve the effect of heat dissipation, improve yield, and protect optical fibers

Inactive Publication Date: 2011-11-30
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to overcome the defects of the existing large-mode-field single-mode multi-core optical fiber with low batch production yield, limited core diameter of block-clad optical fiber, and limited optical power of single-core multi-doped rare earth ion region double-clad optical fiber, a new method was proposed. Circular core multi-sector peripheral multi-sector core fiber and its preparation method

Method used

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  • Peripheral multi-sector core optical fiber of circular core multi-sector area and manufacturing method thereof
  • Peripheral multi-sector core optical fiber of circular core multi-sector area and manufacturing method thereof
  • Peripheral multi-sector core optical fiber of circular core multi-sector area and manufacturing method thereof

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Experimental program
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Effect test

Embodiment 1

[0040] Three sector-shaped rare earth ion-doped regions (11, 12, 13) and three sector-shaped cores (21, 22, 23) are round-core multi-sector regions and multi-sector core fibers, such as figure 1 Shown

[0041] The first sector-shaped neodymium-doped ion region 11, the second sector-shaped erbium-doped ion region 12, and the third sector-shaped ytterbium ion region 13 have the same optical refractive index, radius and radian, forming a complete circular core; the radius of the circular core is 2 microns;

[0042] Three sector cores with the same radius and the same arc are evenly distributed in the inner cladding 3 around the circular core; the radius of the first sector core 21, the second sector core 22, and the third sector core 23 are all 20 microns, The radians are all α=π / 6, and the rare earth-doped ions of the first sector core 21, the second sector core 22, and the third sector core 23 are erbium ions, neodymium ions, and ytterbium ions, respectively;

[0043] The distances b...

Embodiment 2

[0059] Four sector-shaped rare earth ion-doped regions (11, 12, 13, 14) and six sector-shaped cores (21, 22, 23, 24, 25, 26) round core multi-sector area peripheral multi-sector core fiber, such as figure 2 Shown

[0060] The first sector-shaped neodymium-doped ion region 11, the second sector-shaped erbium-doped ion region 12, the third sector-shaped ytterbium ion region 13, and the fourth sector-shaped erbium ion region 14 are equal in optical refractive index, radius and radian, forming a complete circle Core; the radius of the circular core is 5 microns;

[0061] In the inner cladding 3, six sector cores with the same radius and the same radian are evenly distributed around the circular core; the radii of the first sector core 21, the second sector core 22, ..., the sixth sector core 26 are all It is 60 microns, and the radian is α=π / 6. The rare earth-doped ions of the first sector core 21, the second sector core 22,..., and the sixth sector core 26 are erbium ions, neodymium ...

Embodiment 3

[0078] Six sector-shaped rare earth ion-doped regions (11, 12,..., 16) and eighteen sector-shaped cores (21, 22,..., 218) are round-core multi-sector fiber with peripheral multi-sector cores, such as figure 1 Shown

[0079] The first sector-shaped neodymium-doped ion region 11, the second sector-shaped holmium ion-doped region 12, the third sector-shaped erbium-doped ion region 13, the fourth sector-shaped ytterbium ion region 14, the fifth sector-shaped neodymium-ytterbium co-doped ion region 15, the sixth sector The optical refractive index, radius and radian of the samarium ion-doped region 16 are all equal to form a complete circular core; the radius of the circular core is 12 microns;

[0080] Eighteen sector cores with the same radius and the same arc are evenly distributed in the inner cladding 3 around the circular core; the first sector core 21, the second sector core 22, ..., the eighteenth sector core 18 The radius is 100 microns, and the radian is π / 10. The rare earth-d...

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Abstract

An optical fibre with a multiple-sector fiber core at the periphery of a multiple-sector area of the circular fiber core, and a fabrication method thereof belong to the fields of the high-power broadband fiber laser and the special optical fibre, which overcome the problem that a single-core doubly-clad optical fibre with multiple rare-earth ion doped regions is limited to bear optical power and the problem that a block clad optical fibre core layer has a limited diameter. Sector rare-earth ion doped regions 1 to N are all the same in optical refractive index, radius and radian, and form a complete circular fibre core, wherein N is an integer greater than or equal to 3 and less than or equal to 9; sector fibre cores 1 to M having the same radius and the same radian a are evenly distributed around the circular fibre core in an inner cladding layer, wherein M is an integer greater than or equal to N or less than or equal to 32 and a is greater than or equal to pi / 2M and less than or equal to 2pi / M; distances between the vertexes of the sector fibre cores 1 to M and the outer circle of the circular fibre core are equal; and the circular fibre core is equal to the sector fibre cores 1to M in rare-earth ion doping type set. The fabrication method comprises fabricating circular fibre core fine rods and sector fibre core fine rods and organizing the fine rods into the optical fibre.The yield of the optical fibre is high and the welding loss of the optical fiber with a single-mode optical fibre is low; and single-mode operation in large-mode area is realized.

Description

Technical field [0001] The invention relates to a multi-sector fiber core fiber at the periphery of a round core multi-sector area and a manufacturing method thereof, belonging to the fields of high-power broadband fiber amplifiers, lasers and special fibers. Background technique [0002] Rare-earth-doped fiber amplifiers or lasers use rare-earth-doped (Nd, Sm, Ho, Er, Pr, Tm, Yb, etc.) ion fibers to achieve direct light amplification by using stimulated emission mechanisms. [0003] The absorption cross-section and emission cross-section of each rare earth element are different, resulting in different working wavelengths of the corresponding optical fibers. For example, the working wavelength of neodymium-doped fiber is 1000-1150nm, 1320-1400nm; the working wavelength of erbium-doped fiber is 550nm, 850nm, 980-1000nm, 1500-1600nm, 1660nm, 1720nm, 2700nm; the working wavelength of ytterbium-doped fiber is 970-1040nm; The working wavelength of thorium fiber is 455nm, 480nm, 803-825...

Claims

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Application Information

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IPC IPC(8): G02B6/036C03B37/025C03B37/027
CPCC03B37/01228C03B2203/29C03B2203/10C03B2201/34C03B37/01234C03B37/01211C03B2203/23Y02P40/57
Inventor 胡旭东宁提纲裴丽温晓东李晶冯素春杨龙
Owner BEIJING JIAOTONG UNIV
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