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Bent non-sensitive micro-structured optical fiber and production method thereof

A microstructure optical fiber, bending-insensitive technology, applied in the directions of cladding optical fiber, optical waveguide light guide, etc., can solve the problem of poor bending loss effect, achieve good optical transmission characteristics and mechanical characteristics, simple and reliable manufacturing method, and overcome the effect. poor effect

Active Publication Date: 2012-02-15
FENGHUO COMM SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The purpose of the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a bend-insensitive microstructured optical fiber and its manufacturing method, which can effectively overcome the problem of poor bending loss effect caused by microhole asymmetry in the actual manufacturing process. And can provide better small bending radius and low loss characteristics

Method used

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  • Bent non-sensitive micro-structured optical fiber and production method thereof
  • Bent non-sensitive micro-structured optical fiber and production method thereof
  • Bent non-sensitive micro-structured optical fiber and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0061] A target rod with a diameter of 40mm is placed on a VAD deposition lathe, and the mixed gas of silicon tetrachloride, germanium tetrachloride and high-purity oxygen is used to form a germanium-doped quartz glass core layer under the high temperature of the hydrogen-oxygen flame, that is, Figure 4 In the fiber core 1, the total flow rate of the mixed gas is 12000ml / min, and the deposition rate of the core rod is 8g / min to form a germanium-doped core rod. The diameter of the core rod is 30mm, and the diameter of the germanium-doped core layer is 10mm. The relative refractive index difference between the germanium core layer and pure quartz glass is 1.0%.

[0062] see Figure 4 As shown, 12 high-purity quartz tubes 4 with an outer diameter of 10 mm and an inner hole diameter of 7.5 mm are placed along the mandrel (i.e. Figure 4 The fiber cores in 1) are evenly arranged on the outer edge for a week, forming image 3 The 12 air holes 2 in the middle are fixed at the end ...

Embodiment 2

[0068] A pure quartz glass substrate tube with an outer diameter of 35mm and an inner diameter of 31mm is placed on a PCVD deposition lathe, and a mixed gas of silicon tetrachloride, germanium tetrachloride and high-purity oxygen is introduced, and the total flow rate of the mixed gas is 9200ml / min. Under the action of 12.1kW microwave, a germanium-doped quartz core layer is deposited inside the quartz substrate tube. The pressure in the quartz tube is 10.5mbar, and the deposition rate is 4.8g / min. A 5mm thick germanium-doped silicon dioxide core area is deposited, and then On a PCVD rod forming lathe, it melts and shrinks to form a germanium-doped mandrel, forming Figure 4 In the fiber core 1, the diameter of the core rod is 32 mm, the diameter of the germanium-doped core layer is 12.2 mm, and the relative refractive index difference between the germanium-doped core layer and pure silica glass is 0.61%.

[0069] see Figure 4 As shown, 12 high-purity quartz tubes with an ou...

Embodiment 3

[0074] A pure quartz glass substrate tube with an outer diameter of 25mm and an inner diameter of 21mm is placed on an MCVD deposition lathe, and a mixed gas of silicon tetrachloride, germanium tetrachloride and high-purity oxygen is introduced, and the total flow rate of the mixed gas is 10200ml / min. Deposit a germanium-doped quartz core layer inside the quartz substrate tube at a high temperature in an oxygen-hydrogen flame at a deposition rate of 1.8g / min, deposit a germanium-doped silicon dioxide core region with a thickness of 2.5mm, and then melt and shrink to form a germanium-doped core rod. form Figure 4 In the fiber core 1, the diameter of the core rod is 21 mm, the diameter of the germanium-doped core layer is 5 mm, and the relative refractive index difference between the germanium-doped core layer and pure silica glass is 0.25%.

[0075] see Figure 4 As shown, 12 high-purity quartz tubes with an outer diameter of 7 mm and an inner hole diameter of 5 mm are evenly...

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Abstract

The invention discloses a bent non-sensitive micro-structured optical fiber and a production method thereof. The bent non-sensitive micro-structured optical fiber comprises a germanium-doped fiber core and a quartz covering layer which covers the periphery of the fiber core; and 12 air holes are uniformly distributed on the surrounding of the fiber core. The production method comprises the following steps of: utilizing rod making equipment to prepare the germanium-doped fiber core; uniformly arraying 12 quartz pipes in a circumferential direction of the surrounding of the fiber core; fixing the tail ends of the 12 quartz pipes to form an integrated rod combining the bunched fiber cores and the quartz pipes; covering a quartz sleeve on the periphery of the integrated rod to form a bent non-sensitive micro-structured optical fiber prefabricated rod; and utilizing an optical fiber drawing tower to draw the bent non-sensitive micro-structured optical fiber prefabricated rod into the bent non-sensitive micro-structured optical fiber. According to the production method provided by the invention, the problem of bad bending loss effects caused by the asymmetry of micro-pores in the actualproduction process can be effectively solved and better characteristics such as small bending radius and low loss can be provided.

Description

technical field [0001] The invention relates to a microstructure optical fiber in the field of optical communication, in particular to a bending-insensitive microstructure optical fiber and a manufacturing method thereof. Background technique [0002] In order to facilitate understanding of the content of the present invention, first briefly introduce the definitions of terms involved in the present invention: [0003] Deposition: The chemical reaction of optical fiber raw materials in a certain environment to generate doped quartz glass. [0004] Melting: The process of gradually firing the deposited hollow glass tube into a solid glass rod under a certain heat source. [0005] Sleeve: A high-purity quartz glass tube with a certain cross-sectional area and uniform size. [0006] Substrate tube: High-purity quartz glass tube for deposition. [0007] Refractive Index Profile (RIP): The relationship between the refractive index of an optical fiber or optical fiber preform (...

Claims

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Application Information

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IPC IPC(8): G02B6/02
Inventor 罗文勇陈伟黄文俊胡福明莫琦柯一礼赵磊杜城张涛
Owner FENGHUO COMM SCI & TECH CO LTD
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