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Optical fiber preform and its preparation method, optical fiber and its preparation method

A technology of optical fiber preform and optical fiber, which is applied in the field of optical fiber, and can solve the problems of uneven distribution of alkali metal and crystallization, etc.

Active Publication Date: 2021-07-16
HENGTONG OPTICAL MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the above method is prone to cause uneven distribution of alkali metal, crystallization and other undesirable phenomena.

Method used

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  • Optical fiber preform and its preparation method, optical fiber and its preparation method
  • Optical fiber preform and its preparation method, optical fiber and its preparation method
  • Optical fiber preform and its preparation method, optical fiber and its preparation method

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0036] The inventors of the present invention have found through research that in order to obtain more alkali metal-...

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Abstract

The invention relates to the field of optical fibers, and specifically discloses an optical fiber prefabricated rod, which includes a core rod and a cladding layer coated outside the core rod; the core rod includes an inner core rod and an outer core layer coated outside the inner core rod; The core rod is a quartz rod doped with alkali metal; the outer core layer is a quartz tube doped with alkali metal; the alkali metal concentration decreasing direction of the inner core rod is opposite to that of the outer core layer. The above-mentioned optical fiber preform adopts at least two core layer structures, and the decreasing direction of the alkali metal concentration in the two core layers is opposite, so that the alkali metal concentration in the optical fiber is uniformly distributed in the radial direction and the longitudinal direction through wire drawing, and crystallization is not easy to occur , to further reduce Rayleigh scattering of light and reduce fiber loss. The invention also discloses a preparation method of an optical fiber preform rod, an optical fiber and a preparation method thereof.

Description

technical field [0001] The invention relates to the field of optical fiber technology, in particular to an optical fiber preform rod and a preparation method thereof, an optical fiber and a preparation method thereof. Background technique [0002] Ultra-low loss fiber can increase the transmission distance, reduce the complexity of the network by reducing relays, and greatly reduce the construction cost. With the development of the network, the demand for bandwidth is increasing. At this time, ultra-low loss fiber is becoming more and more popular. The market favors. [0003] Ultra-low loss optical fiber is generally a quartz-based glass optical fiber whose core is doped with alkali metal. If the core of the optical fiber preform contains alkali metal elements, when drawn into an optical fiber, the alkali metal elements can reduce the viscosity of the core, relax the network structure of silica, make the density uniform, and reduce the density The Rayleigh scattering loss ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B37/012C03B37/027
CPCC03B37/012C03B37/027
Inventor 张飞劳雪刚肖华沈震强翟云霄陈皎
Owner HENGTONG OPTICAL MATERIAL CO LTD
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