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Single mode fiber and manufacturing method thereof

A single-mode optical fiber and optical fiber technology, which is applied in clad optical fiber, manufacturing tools, glass manufacturing equipment, etc., can solve the problems of large proportion of optical fiber and increased optical fiber manufacturing cost, and achieve balanced optical fiber performance parameters, balanced manufacturing cost, and low cost. The effect of bending loss

Active Publication Date: 2015-07-01
长飞(武汉)光系统股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the core size of the optical fiber of this invention accounts for a large proportion of the optical fiber, so it will increase the manufacturing cost of the optical fiber

Method used

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  • Single mode fiber and manufacturing method thereof
  • Single mode fiber and manufacturing method thereof
  • Single mode fiber and manufacturing method thereof

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Embodiment Construction

[0047] The present invention is further described in detail below in conjunction with the examples.

[0048] Including a core layer 10 and a cladding layer, the cladding layer outside the core layer is an inner cladding layer 20, a depressed cladding layer 30 and an outer cladding layer 40 from the inside to the outside, the diameter d of the outer cladding layer is 125 microns, and the refractive index of the outer cladding layer is pure 2 Refractive index of silica glass.

[0049] The core layer and the inner cladding layer are quartz glass layers doped with germanium (Ge) and fluorine (F), and the material composition is SiO 2 -GeO 2 -F-Cl, from the interface 21 of the inner cladding layer and the depressed cladding layer to the inner interface 11 of the core layer and the inner cladding layer, the doping of fluorine (F) and germanium (Ge) gradually and continuously increases, showing a gradient change, and the inner cladding layer and the depression The contribution ΔF o...

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Abstract

The invention relates to a single mode fiber and a manufacturing method thereof. The single mode fiber comprises a core layer and a covering layer. The single mode fiber is characterized in that the diameter a of the core layer is 9.9-10.9 micrometers, and the delta 1 is 2.1*10<-3>-3.8*10<-3>; the covering layer outside the core layer sequentially comprises an inner covering layer, a sunk covering layer and an outer covering layer from inside to outside; the diameter b of the inner covering layer is 16-22 micrometers, and the delta 2 is -5*10<-4>-5*10<-4>; the diameter c of the sunk covering layer is 24-38 micrometers, and the delta 3 is -15*10<-3>--3*10<-3>, and the width of the sunk covering layer is 4-11 micrometers. According to the single mode fiber, the effective area of the fiber is equal to or larger than 110 micrometer <2>, and the nonlinear effect in the transmission fiber is lowered effectively. In addition, the comprehensive performance parameters of the cutoff wavelength, the bending loss, the chromatic dispersion and the like are good in the application wave band, so that the single mode state of optical signals of the fiber in transmission and application of the C wave band is guaranteed. The size of the core layer of the fiber is controlled reasonably, so that the manufacturing cost of the fiber is lowered effectively, and good balance between the manufacturing cost of the fiber and the performance parameters of the fiber is achieved.

Description

technical field [0001] The invention relates to a single-mode optical fiber and its manufacturing method. The optical fiber has a larger effective area and better bending performance, and is especially suitable for use in large-capacity, high-speed long-distance transmission systems. Background technique [0002] With the continuous development of optical fiber transmission technology, the development of erbium-doped fiber amplifier (EDFA) and wavelength division multiplexing (WDM) technology were applied in the mid-1990s. In the WDM equipment system, due to the large insertion loss of the multiplexer and the splitter, EDFA is often used for amplification compensation. However, while amplifying the optical power, it also greatly increases the nonlinear effect in the fiber. Optical nonlinear effects include four-wave mixing, self-phase modulation, and cross-phase modulation, which limit the capacity and distance of optical transmission. Therefore, in a large-capacity, hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/028C03B37/018C03B37/025C03C25/28
CPCC03B2201/31C03B2203/23C03B2201/20C03B37/01413C03B37/01211C03B2201/12
Inventor 王润涵龙胜亚王智勇毛明峰艾靓
Owner 长飞(武汉)光系统股份有限公司
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