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Single mode optical fiber having multi-step core structure and method of fabricating the same

A single-mode optical fiber and core wire technology, applied in the direction of multi-layer core/clad optical fiber, graded index core/clad optical fiber, clad optical fiber, etc.

Inactive Publication Date: 2004-08-25
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, manufacturing optical fibers with small diameter cores and a core triangular index profile requires precise process control

Method used

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  • Single mode optical fiber having multi-step core structure and method of fabricating the same
  • Single mode optical fiber having multi-step core structure and method of fabricating the same
  • Single mode optical fiber having multi-step core structure and method of fabricating the same

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Experimental program
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Embodiment Construction

[0027] refer to image 3 , a central core wire 2 has a predetermined diameter a1 from the central axis and a refractive index n1. A first outer core 4 having a diameter a2 and a refractive index n2 lower than the refractive index n1 and surrounding the central core 2 . A second outer core wire 6 having a diameter a3 and a refractive index n3 lower than the refractive index n2 and surrounding the first outer core wire 4 . Finally, an outer cladding 8 having a diameter a4 and a lower refractive index n0 than the refractive index n3 and surrounding the second outer core 6 . The refractive indices of the first and second outer core wires 4 and 6 may have any distribution of refractive indices described by the following formula 1:

[0028] n(r)=n 1 (1-Δ(γ / a) α ) (1) where r is the distance from the center of the fiber, a is the diameter of the core wire, n 1 is the refractive index of the fiber center, and α is the refractive index profile parameter. For example...

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Abstract

An optical fiber having a multi-step core structure, and a method of fabricating the same, are provided. The optical fiber includes a central core having a predetermined radius a1 from an central axis and a refractive index n1, a first outer core having a radius a2 and a refractive index n2 smaller than the refractive index n1 and surrounding the central core, a second outer core having a radius a3 and a refractive index n3 smaller than the refractive index n2 and surrounding the first outer core, and a cladding having a radius a4 and a refractive index n0 smaller than the refractive index n3 and surrounding the second outer core. The diameter of the core is increased by making the refractive index distribution of the core multi-stepped, thus providing easy fabrication.

Description

technical field [0001] The present invention relates to a single-mode optical fiber with low dispersion and low loss in the 1550nm wavelength base band, especially relates to an optical fiber with a multi-level core structure and a method for manufacturing the optical fiber. Background technique [0002] Due to the rapid development of ultra-high-speed optical fiber transmission and large-capacity communication technology recently, the loss and dispersion of optical fibers limit ultra-high-speed and large-capacity transmission. In order to overcome the limitation due to fiber loss, a single-mode silica fiber is used in the 1550nm wavelength region with the lowest loss value, and an optical amplifier capable of amplifying optical signals in the 1550nm wavelength region is used. Therefore, this loss no longer limits ultra-high-speed large-capacity transmission, and discrete control is also considered to be a very important technical issue. [0003] However, a typical single-m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/028G02B6/02G02B6/036G02B6/04
CPCG02B6/02238G02B6/03638G02B6/03666
Inventor 金真汉都文显李知勋
Owner SAMSUNG ELECTRONICS CO LTD