A low bending loss superfine low water peak fiber

A technology of bending loss and low water peak, applied in cladding optical fiber, optical waveguide and light guide, etc., can solve the problems of failure to provide optical fiber, achieve excellent bending resistance, improve bending loss performance, and increase the length of optical fiber

Active Publication Date: 2007-05-30
HANGZHOU FUTONG COMM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0037] From the above analysis, it can be seen that small-sized and low-bending-loss optical fibers will have extensive and important applications in national life, especially in the military field, but currently the market has not been able to provide corresponding satisfactory optical fibers

Method used

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  • A low bending loss superfine low water peak fiber
  • A low bending loss superfine low water peak fiber
  • A low bending loss superfine low water peak fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] by the core SiO 2 The method of doping Ge in the medium makes Δ1 between 0.39% and 0.50% at a wavelength of 632.8nm; doping F in the SiO2 of the first cladding layer makes Δ2 between -0.070% and -0.014% at a wavelength of 632.8nm ;The thickness of the core layer and the first cladding layer is controlled by controlling the flow rate of the VAD blowtorch, which are between 2.8-3.2m and 2.5-6.0μm respectively; the thickness of the second cladding layer is between 8.5-13.0μm; by controlling The diameter of the optical fiber is controlled at 80±5μm by wire drawing speed and dropper temperature; the thicknesses of the two coating resins are guaranteed to be about 20 and 10μm respectively; the diameter of the final finished optical fiber is 140±5μm; the first The Young's modulus of the coating 14 and the second coating 15 are about 1.2 MPa and 760 MPa respectively, and the elastic modulus are 1.1 MPa and 1400 MPa respectively. The cross-sectional shape of this fiber can be s...

Embodiment 2

[0067] By doping Ge in the core layer SiO2, Δ1 is between 0.55% and 0.63% at a wavelength of 632.8nm; the first cladding layer is not specially doped, and its refractive index distribution is freely distributed under the influence of the first blowtorch; The thickness of the core layer and the first cladding layer are controlled by controlling the flow rate of the VAD blowtorch, which are between 2.3-3.0 μm and 3.5-5.6 μm respectively; the thickness of the second cladding layer is between 9.4-12.3 μm; by controlling the wire drawing Control the fiber diameter at 80μm±5μm by speed, dropper temperature, etc.; ensure that the thicknesses of the two coating resins are about 20 and 10μm respectively; the final product fiber diameter is 140±5μm; the first coating The Young's modulus of the layer 14 and the second coating 15 are about 1.2 MPa and 760 MPa respectively, and the elastic modulus are 1.1 MPa and 1400 MPa respectively. The cross-sectional shape of this optical fiber can be...

Embodiment 3

[0074] By doping Ge in the core layer SiO2, Δ1 is between 0.43% and 0.63% at a wavelength of 632.8nm, and Δ2 is between 0.03% and 0.07%. The core layer and the first The thickness of the cladding is between 2.5-2.7μm and 4.0-6.5μm respectively; the thickness of the second cladding is between 8.8-11.5μm; the fiber diameter is controlled at 80μm± by controlling the drawing speed, dripper temperature, etc. 5 μm; ensure that the thicknesses of the two coating resins are about 20 and 10 μm respectively; the diameter of the final finished optical fiber is 140±5 μm; the Young’s modulus of the first coating 14 and the second coating 15 are controlled by the resin and assimilation conditions They are about 1.2MPa and 760MPa respectively, and the elastic modulus are 1.1MPa and 1400MPa respectively. The cross-sectional shape of this optical fiber can be shown in FIG. 4 . The geometric parameters and performances of several typical optical fibers obtained in this embodiment are shown in ...

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Abstract

An ultra-fine low-flow peak optical fibre with low bending loss relates to a optical fibre, specially the low bending-loss ultra-fine low-flow peak optical fibre which fits for the wavelength-division multiplex (WDM) transmission in band of 1285-1625nm. The utility model discloses a low bending-loss ultra-fine low-flow peak monomode optical fiber which comprises silica glass core, silica glass cladding and inner and outer resin layer, the refractive index of the core layer is 1.4629-1.4664, thickness of the core layer is 2.3-3.2 mum; The refractive index of the first cladding is 1.4562-1.4582, thickness is 2.5-6.5 mum; The second cladding is pure silica glass, its thickness is 8.5-12.3 mum. The utility model optical fibre possesses perfect bending resistance, but also the ultra-fine size, the diameter of bare fiber is about 80 mum, the diameter of fiber which is coated with resin is about 140 mum.

Description

technical field [0001] The invention relates to an optical fiber, in particular an ultra-thin low water peak optical fiber with low bending loss, which is suitable for wavelength division multiplexing (WDM) transmission in the entire band of 1285-1625nm. Background technique [0002] 1.1 Status Quo of Optical Fiber Development [0003] As a communication material, optical fiber is widely used in communication networks, civil and national defense and other fields due to its advantages such as large capacity, low cost, and good stability. [0004] An optical fiber is generally composed of a quartz glass core, a quartz glass protective layer, and an inner and outer double-layer UV-cured acrylic resin coating. The quartz layer is used to transmit signals, while the resin layer plays a protective role. During the transmission process of optical fiber, many problems related to propagation characteristics will be encountered, the most important of which is fiber loss. Optical fib...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/02
Inventor 张立永李群星黄晓鹏卢卫民吴兴坤
Owner HANGZHOU FUTONG COMM TECH CO LTD
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