Manufacturing method of porous optical fiber preform

A technology of a holey optical fiber and a manufacturing method, which can be applied to manufacturing tools, glass manufacturing equipment, etc., can solve the problems of poor optical fiber polarization model characteristics, affecting the normal service life of optical fibers, and asymmetric circumferential force, so as to improve polarization model characteristics and bending. Loss characteristics, ensuring high cleanliness control issues, and ensuring the effect of cleanliness control

Active Publication Date: 2012-10-17
WUHAN FIBERHOME RUITUO TECH CO LTD
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Problems solved by technology

In the conventional manufacturing process of micro-hole optical fiber, the method of capillary bunching and other methods is easy to introduce new impurities, causing capillary pollution, so that the optical fiber preform is polluted inside before it is drawn into an optical fiber, so that the formed The optical fiber preform itself is polluted by various impurities that affect the attenuation of the optical fiber
When the optical fiber preform prepared in this way is used to draw the optical fiber, the transmission loss of the obtained optical fiber will be greatly increased compared with the conventional communication optical fiber, so it is difficult to be applied in the actual communication system
[0004] If the microholes distributed around the core rod are unevenly distributed, it will cause light leakage on the one hand, which will deteriorate the bending loss chara

Method used

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  • Manufacturing method of porous optical fiber preform
  • Manufacturing method of porous optical fiber preform
  • Manufacturing method of porous optical fiber preform

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1: VAD process, opening six arc-shaped grooves with an arc angle of 320 degrees

[0034] The germanium-doped mandrel 4 is prepared by VAD technology, the radius r3 of the quartz cladding 3 of the mandrel 4 is 15 mm, the radius r1 of the germanium-doped core 1 is 5 mm, and the out-of-roundness of the core 1 is within 0.8%. The relative refractive index difference between the germanium-doped core layer 1 and pure quartz glass is 0.35%. see figure 2 As shown, on the outer edge of the germanium-doped mandrel 4, open six arc-shaped slots 2 with an arc angle of 320 degrees, the radius r2 of the arc-shaped slots 2 is 3mm, and the centers of the six arc-shaped slots 2 form equilateral six For the six corners of the angle, the distance between the center of the circle and the center of the core layer 1 is 12mm. Soak the mandrel 4 with the arc-shaped groove 2 in acid solution to remove impurities, clean it with deionized water, and then dry it in a clean oven.

[0035...

Embodiment 2

[0037] Embodiment 2: PCVD process, open 12 semicircular slots

[0038] The germanium-doped mandrel 4 is prepared by PCVD technology, the radius r3 of the quartz cladding 3 of the mandrel 4 is 12 mm, the radius r1 of the germanium-doped core layer 1 is 2.5 mm, and the out-of-roundness of the core layer 1 is within 1.2%. The relative refractive index difference between the germanium-doped core layer 1 and pure quartz glass is 0.25%. Then at the periphery of germanium-doped core rod 4, open 12 semicircular grooves, the radius of groove is 0.8mm, the circle center of 12 semicircle grooves forms 12 angles of equilateral 12 deformation, and circle center is positioned at core rod 4 The distance between the outer edge and the center of the mandrel 4 is 12mm. Soak the mandrel 4 with the semicircular groove in acid solution to remove impurities, clean it with deionized water, and then dry it in a clean oven.

[0039] A quartz casing 6 of a corresponding size is placed on the core rod...

Embodiment 3

[0041] Embodiment 3: MCVD process, opening three semicircular slots

[0042] The germanium-doped mandrel 4 is prepared by MCVD technology, the radius r3 of the quartz cladding 3 of the mandrel 4 is 10mm, wherein the radius r1 of the germanium-doped core layer 1 is 2.0mm, and the out-of-roundness of the core layer 1 is 1.0%. The relative refractive index difference between the germanium core layer 1 and pure quartz glass is 0.05%. Then in the periphery of germanium-doped core rod 4, open three semicircular grooves, the radius of groove is 1mm, and the circle center of three semicircle grooves forms three angles of equilateral triangle, and circle center is positioned at the outer edge of core rod 4 , the distance from the center of mandrel 4 is 10mm. Soak the mandrel 4 with the semicircular groove in acid solution to remove impurities, clean it with deionized water, and then dry it in a clean oven.

[0043] A quartz casing 6 of a corresponding size is placed on the mandrel 4 ...

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Abstract

The invention discloses a manufacturing method of a porous optical fiber preform, and relates to the field of new material. The method includes the steps of: preparing a mandril by using a conventional communication optical fiber preparation method, wherein the mandril contains a germanium doped quartz core layer and a pure silica quartz cladding arranged on periphery of the core layer, and the germanium doped quartz core layer and the pure silica quartz cladding are concentric circles; opening a certain number of arc slots on angles of the mandril outer edge, according to design requirements of a porous bending insensitive optical fiber, immersing the mandrel with arc slots with acid solution to remove impurities, washing by deionized water and drying; sleeving a quartz casing on the mandrel with arc slots; inserting capillaries into the arc slots to form the desired pore, thereby preparing the porous optical fiber preform. The method of the invention can realize precise positioning of micropores in the manufacturing process of porous optical fiber, improve polarization mode property and bending loss property of the porous optical fiber, reduce impurity pollution in the processing process of the porous optical fiber preform and improve attenuation property of the porous optical fiber.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a method for manufacturing a porous optical fiber preformed rod. Background technique [0002] In recent years, with the rapid development of fiber-to-the-home, how to solve the problem of fiber access in the last 100 meters has become the target of people's attention. In the small bending environment of conventional optical fibers, the bending loss of the optical fiber increases sharply. This is one of the key factors restricting the application of optical fiber in the last 100 meters. Conventional communication optical fiber cannot realize the information transmission of optical signals with small bending loss under the existing high-speed optical fiber communication system; conventional G.657 optical fiber has a large loss in the extremely small bending diameter (below 5mm), and cannot be bent arbitrarily. Applications in end-user environments are limited, therefore, there is an...

Claims

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Application Information

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IPC IPC(8): C03B37/018
CPCC03B37/0122
Inventor 罗文勇陈伟胡福民莫琦
Owner WUHAN FIBERHOME RUITUO TECH CO LTD
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