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Manufacturing of optical fibers with symmetry-breaking longitudinal protrusions

A fiber optic, longitudinal technology, applied in the manufacturing field of china, which can solve the problems of low mechanical resistance, increased processing time, fiber weakening, etc.

Inactive Publication Date: 2018-12-21
CORACTIVE HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding a ridge at the cladding boundary involves incorporating a rod into the fiber preform, requiring drilling of the preform, which also increases processing time
Furthermore, the resulting fiber is weakened due to the transition between the rod and the surrounding preform prone to stress and lower mechanical resistance

Method used

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  • Manufacturing of optical fibers with symmetry-breaking longitudinal protrusions
  • Manufacturing of optical fibers with symmetry-breaking longitudinal protrusions
  • Manufacturing of optical fibers with symmetry-breaking longitudinal protrusions

Examples

Experimental program
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Embodiment Construction

[0044] This specification relates to methods of manufacturing optical fibers and optical fibers resulting from such manufacturing.

[0045] Embodiments of the methods described herein provide an optical fiber having an active core for optical amplification and a pump-guiding cladding adapted to guide a pump beam. As will be described further below, the fiber provided by the present method also includes one or more longitudinal protrusions which break the circular symmetry of the fiber and thus improve the absorption coefficient and pump power from the pump-guiding cladding in the active core Absorption.

[0046] It will be readily appreciated that embodiments of the method may be used to manufacture optical fibers for use in light emitting devices. Such light emitting means may emit light and, alternatively or additionally, it may amplify light. The light emitting device can be realized by an amplifier or a pulsed amplifier, which can be implemented by a laser, a pulsed lase...

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PUM

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Abstract

A method of manufacturing an optical fiber is provided. The method involves providing a fiber preform with an active core and a pump-guiding cladding, and assembling one or more side rods to the fiberpreform. The side rods extend longitudinally along an outer surface of the pump-guiding cladding. The resulting fiber preform assembly is drawn into the optical fiber. Each side rod defines a longitudinal protrusion extending along the optical fiber. Each longitudinal protrusion may have a cross-section forming a middle bump projecting radially away from the outer surface of the pump-guiding cladding and smooth transition regions with this outer surface of the pump-guiding cladding on opposite sides of the middle bump.

Description

technical field [0001] The technical field relates generally to optical fibers, and more particularly to the manufacture of double-clad optical fibers and the like, wherein a cladding-guided pump beam is to be coupled into the core of the optical fiber. Background technique [0002] Optical fibers with active cores can be used as light emitting devices. For this purpose, the core of the fiber may be doped with active ions, such as rare earth elements such as thulium, ytterbium, erbium neodymium or combinations thereof, which are used to generate stimulated emission of photons from the dopant ions in the doped fiber. Such fibers can be used in light emitting devices such as lasers or amplifier configurations. [0003] There is a need for light emitting devices with good beam quality that provide long working distances with high power density. Beam quality is usually referred to as M 2 Measured by the dimensionless parameter of the factor, which can take a value of 1.0 or h...

Claims

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Application Information

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IPC IPC(8): C03B37/027C03B37/012C03B37/075G02B6/036H01S3/067
CPCC03B37/01211C03B37/02754C03B2203/10C03B2203/12C03B2203/23C03B2203/32C03B2205/12G02B6/036H01S3/06729H01S3/06733H01S3/1601C03B37/02C03B37/025C03B37/027C03B2203/18C03B2205/00G02B6/0285G02B6/03694
Inventor B.莫拉斯Y.瓦西尔D.福廷-马格南
Owner CORACTIVE HIGH TECH