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Low-loss single-mode optical fiber and wiredrawing process thereof

A single-mode fiber, low-loss technology, used in clad fibers, glass fibers, multi-layer core/clad fibers, etc., can solve the problems of low strength, low internal stress, and high strength of single-mode fibers, and avoid heat The effect of rapid loss, elimination of residual internal stress and low loss

Active Publication Date: 2018-11-30
江苏南方光纤科技有限公司
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Problems solved by technology

[0006] One of the technical problems to be solved by the present invention is the problem of low strength and large internal stress of the single-mode optical fiber in the prior art. A new low-loss single-mode optical fiber is proposed, which has high strength and small internal stress. features

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  • Low-loss single-mode optical fiber and wiredrawing process thereof
  • Low-loss single-mode optical fiber and wiredrawing process thereof
  • Low-loss single-mode optical fiber and wiredrawing process thereof

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it, but the examples given are not intended to limit the present invention.

[0029] See figure 1 , this embodiment discloses a low-loss single-mode optical fiber, including a core layer 1, an inner cladding layer 2 and an outer cladding layer 3 arranged in sequence from the inside to the outside, the diameter of the core layer 1 is 7 μm to 8 μm, and the inner cladding layer 2 has a diameter of 15 μm to 25 μm, the core layer 1 is silicon dioxide doped with germanium, the mass fraction of germanium doped in the core layer 1 is 0.05wt% to 0.08wt%, and the refractive index of the core layer 1 is no 1 =1.463~1.467, the positive refractive index difference of the core layer 1 is Δn=﹢0.2%~0.3%, the inner cladding layer 2 is made of fluorine-doped silica, and the...

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Abstract

The invention discloses a low-loss single-mode optical fiber and a wiredrawing process thereof, and mainly solves a technical problem that in the prior art, a single-mode optical fiber is low in intensity and large in internal stress. The invention well solves the problem and can be used for an optical fiber by the technical scheme that the low-loss single-mode optical fiber is characterized by comprising a core layer, an inner coating layer and an outer coating layer which are sequentially arranged from inside to outside, wherein the core layer adopts germanium-doped silicon dioxide; the inner coating layer adopts fluorine-doped silicon dioxide; the outer coating layer adopts silicon dioxide; and the inner coating layer is of a sunk profile structure.

Description

technical field [0001] The invention relates to a low-loss single-mode optical fiber and its drawing process. Background technique [0002] Optical fiber strength is one of the key indicators of low-loss optical fiber, which is mainly reflected in the screening strain. The strain of ordinary optical fiber is generally about 1%, and the strain comes from the tension caused by laying and thermal expansion and contraction. In the link, it is often necessary to cross harsh environments such as oceans, mountains, and deserts. When considering changes in laying or ambient temperature, the tension suffered is greater than that of ordinary optical cables. [0003] The strength of the optical fiber depends on the microcracks on the surface of the bare fiber. The microcracks in the optical fiber mainly come from the impurity particles in the drawing furnace. During the drawing process, the impurity particles adhere to the surface of the optical fiber, forming cracks and stress concen...

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Application Information

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IPC IPC(8): G02B6/02G02B6/036C03C13/04C03B37/027
CPCC03B37/027C03C13/04G02B6/02395G02B6/036
Inventor 许永王怀童李强邢应朋殷国亮
Owner 江苏南方光纤科技有限公司
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