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Method for preparing rare earth ion co-doped optical fiber preform

A technology of optical fiber preform and rare earth ions, which is applied in the field of optical fiber manufacturing technology, can solve the problems of preparing gradient rare earth doped optical fiber, and achieve the effect of reducing research and development costs and improving scientific research efficiency

Active Publication Date: 2015-04-29
CHINA ELECTRONICS TECH GRP NO 46 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no effective technical means to prepare gradient rare earth-doped optical fibers

Method used

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  • Method for preparing rare earth ion co-doped optical fiber preform
  • Method for preparing rare earth ion co-doped optical fiber preform

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Experimental program
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Embodiment 1

[0019]Embodiment 1: This embodiment is suitable for making optical fiber preforms with different ion co-doping ratios in the axial direction. For ease of understanding, this embodiment takes the production process of a relatively common erbium-ytterbium co-doped optical fiber preform as an example for illustration. Firstly, a preformed rod containing a loose core layer is deposited by MCVD technology. After the deposition is completed, the preformed rod 4 connected with the support tube 5 is removed and fixed on the electronically controlled precision lifting device 6 through the clamp 7 . Inject ytterbium ion solution, erbium ion solution, aluminum ion solution and deionized water into the first conical glass container 8, the second conical glass container 9, the third conical glass container 10 and the fourth conical glass container 11 respectively , then open the first switch 12, the second switch 13, the third switch 14 and the fourth switch 15, and control the first flowm...

Embodiment 2

[0021] Embodiment 2: This embodiment is suitable for making optical fiber preforms with the same ion co-doping ratio and different doping concentrations in the axial direction. Firstly, a preformed rod containing a loose core layer is deposited by MCVD technology. After the deposition is completed, the preformed rod 4 connected with the support tube 5 is removed and fixed on the electronically controlled precision lifting device 6 through the clamp 7 . In the first conical glass container 8, the second conical glass container 9, the third conical glass container 10 and the fourth conical glass container 11, respectively inject A kind of rare earth ion solution, B kind of rare earth ion solution, co-doped ion Solution and deionized water, then open the first switch 12, the second switch 13, the third switch 14 and the fourth switch 15, and control the first flowmeter 17, the second flowmeter 18, the third flowmeter by controlling the opening time of the switch The flowmeter 19 ...

Embodiment 3

[0022] Embodiment 3: This embodiment is suitable for making a gradient-doped rare earth optical fiber preform. Firstly, a preformed rod containing a loose core layer is deposited by MCVD technology. After the deposition is completed, the preformed rod 4 connected with the support tube 5 is removed and fixed on the electronically controlled precision lifting device 6 through the clamp 7 . In the first conical glass container 8, the second conical glass container 9, the third conical glass container 10 and the fourth conical glass container 11, respectively inject A kind of rare earth ion solution, B kind of rare earth ion solution, co-doped ion Solution and deionized water, then open the first switch 12, the second switch 13, the third switch 14 and the fourth switch 15, and control the first flowmeter 17, the second flowmeter 18, the third flowmeter by controlling the opening time of the switch The flowmeter 19 and the fourth flowmeter 20 are connected to the four tapered glas...

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Abstract

The invention relates to a method for preparing a rare earth ion co-doped optical fiber preform. The method comprises the following steps: respectively preparing an aqueous solution of a codoping agent of a plurality of rare earth ions and aluminum ions; selecting a quartz base tube and connecting into an MCVD lathe, and sequentially depositing an isolating layer and a loose core layer after high-temperature polishing; fixing a hollow preform body containing the loose core layer on a lifting device, and allowing a preform body part to be soaked in the solution; changing the co-doping ratios and concentrations of various ions in the solution according to the co-doping ratio distribution and concentration distribution of ions of a pre-designed preform core in the axial direction, and simultaneously adjusting the soaked length of the preform body through the lifting device; allowing the soaked preform body to be re-connected into the MCVD lathe, and vitrifying the loose core layer after drying and dehydrating, and finally, collapsing the preform body into a solid preform. The method can be used for flexibly and precisely controlling the distribution of co-doping ratios and doping concentrations of ions of the preform core part in the axial direction, and a very efficient and simple method is provided for finding out the best ion co-doping ratio and doping concentration for different types of rare earth ion co-doped optical fibers.

Description

technical field [0001] The invention relates to an optical fiber manufacturing process, in particular to a method for preparing a rare earth ion co-doped optical fiber preform. Background technique [0002] In 1985, researchers at the University of Southampton in the United Kingdom successfully developed a rare earth-doped optical fiber by using a modified chemical vapor deposition process (Modified Chemical Vapor Deposition, MCVD). In the past 30 years, researchers have continuously improved and innovated the preparation process of rare earth-doped optical fibers, which has led to the continuous and rapid development of rare earth-doped optical fiber amplifiers and lasers. Lasers and their application technology are an important cutting-edge technology in the field of optoelectronics related to national defense and people's livelihood. Compared with other types of lasers such as semiconductor lasers and gas lasers, fiber lasers with rare earth-doped fibers as gain media hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B37/018
CPCC03B37/01838C03B37/018
Inventor 耿鹏程梁小红庞璐衣永青潘蓉高亚明张佳琦张慧嘉李瑞辰
Owner CHINA ELECTRONICS TECH GRP NO 46 RES INST
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