Manufacturing method of rare earth-doped optical fiber preformed rod

A technology of optical fiber preform and manufacturing method, which is applied in the direction of manufacturing tools and glass manufacturing equipment, etc. It can solve the problems of small diameter of the core area of ​​the optical fiber preform, high requirements for heat preservation and high temperature resistance, and lack of large-scale production. The effect of large size, reducing the requirements for temperature resistance and corrosion resistance, and improving production efficiency

Active Publication Date: 2013-01-16
RUIGUANG TELECOMM TECH CO LTD
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Problems solved by technology

[0009] In summary, in the process of manufacturing rare earth-doped optical fiber preforms, the conventional process has the following defects: the vapor phase evaporation method of the material cabinet has too high requirements for equipment insulation and high temperature resistance, and the co-doping method is complicated; the rare ...

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  • Manufacturing method of rare earth-doped optical fiber preformed rod
  • Manufacturing method of rare earth-doped optical fiber preformed rod
  • Manufacturing method of rare earth-doped optical fiber preformed rod

Examples

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no. 1 example

[0040] Such as figure 2 As shown, the rare earth material prefabricated target rod 1 is installed on the inner inlet end of the substrate tube 2 of quartz glass and fixed, the inner diameter of the substrate tube 2 is 15 mm, the diameter of the rare earth material prefabricated target rod 1 is 8 mm, and the rare earth material is YbCl 3 (ytterbium chloride), AlCl 3 Mixture, rare earth material prefabricated target rod 1 with a length of 100 mm and a density of 3.5 g / cm 3 , installing the assembled substrate tube 2 on the MCVD equipment. Then focus the laser 4 with a wavelength of 1064nm on the surface of the prefabricated rare earth material target rod 1. The diameter of the beam spot of the laser 4 is 4.5mm, and the laser output power is 100w. material, during the above laser ablation evaporation process, at the same time, the O 2 , Cl 2 、SiCl 4 、GeCl 4 And the mixed gas 3 that the carbide of fluorine is formed, the carbide of fluorine is C in the present embodiment 2...

no. 2 example

[0042] Such as figure 2 As shown, the rare earth material prefabricated target rod 1 is installed and fixed at the inner inlet end of the substrate tube 2 of quartz glass, the inner diameter of the substrate tube 2 is 24 mm, the diameter of the rare earth material prefabricated target rod 1 is 15 mm, and the rare earth material is ErCl 3 (erbium chloride), AlCl 3 Mixture, rare earth material prefabricated target rod 1 with a length of 100mm and a density of 4g / cm 3 , installing the assembled substrate tube 2 on the PCVD equipment. Then focus the laser 4 with a wavelength of 800nm ​​on the surface of the prefabricated rare earth material target rod 1. The beam spot diameter of the laser 4 is 4mm, and the laser output power is 200w. , during the above laser ablation evaporation process, at the same time, O is introduced in the direction of the arrow 2 , Cl 2 、SiCl 4 、GeCl 4 And the mixed gas 3 that the carbide of fluorine is formed, the carbide of fluorine is C in the pre...

no. 3 example

[0044] Such as image 3 As shown, the rare earth material prefabricated target rod 1 is first installed inside the quartz glass protective tube 5, and then the quartz glass protective tube 5 is installed and fixed at the inlet end of the substrate tube 2. The inner diameter of the substrate tube 2 is 51mm, and the rare earth material The diameter of the prefabricated target rod 1 is 18mm, and the rare earth material is YbCl 3 , ErCl 3 , AlCl 3 Mixture, rare earth material prefabricated target rod 1 with a length of 100mm and a density of 4g / cm 3 , installing the assembled substrate tube 2 on the PCVD equipment. Then focus the laser 4 with a wavelength of 1300nm on the surface of the prefabricated rare earth material target rod 1. The beam spot diameter of the laser 4 is 4mm, and the laser output power is 200w. , during the above laser ablation evaporation process, at the same time, O is introduced in the direction of the arrow 2 , Cl 2 、SiCl 4 、GeCl 4 And the mixed gas...

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Abstract

A manufacturing method of a rare earth-doped optical fiber preformed rod relates to the field of optical fiber preformed rods, and comprises the following steps: S1, mounting a cylindrical rare earth material preformed target rod at a gas inlet end in a quartz glass substrate tube, mounting the substrate tube on a chemical vapor deposition device; S2, focusing laser on the rare earth material preformed target rod, introducing mixed gas composed of oxygen, chlorine, silicon tetrachloride gas, germanium tetrachloride gas, and carbides of fluorine, performing deposition to form an optical fiber core rod preform; S3, melting the optical fiber core rod preform for contraction at a high temperature to form the transparent optical fiber preformed rod. The method increases the diameter of the optical fiber preformed rod, greatly improves the production manufacturing efficiency and the rare earth ion doping uniformity of the rare earth-doped optical fiber preformed rod, reduces the content of ineffective impurities of the optical fiber preformed rod, also reduces the production cost, and is suitable for popularization of large-scale production.

Description

technical field [0001] The invention relates to the field of optical fiber preforms, in particular to a method for manufacturing rare earth-doped optical fiber preforms. Background technique [0002] In the field of fiber lasers and optical amplifiers, rare earth-doped optical fiber and preform manufacturing technology is the core technology, however, the rare earth ions are prone to cluster phenomenon in the quartz matrix, so the concentration of rare earth ions doped in the optical fiber is limited, it is difficult Meet the gain requirements of fiber lasers. Since the doping concentration of pure silica fiber cannot be too high, low concentration and low absorption make the fiber very long to fully absorb the optical pump power. However, using the communication fiber technology, the background absorption of the core is 5-10 dB / km. On the other hand, since the melting point and vaporization temperature of inorganic compounds of rare earth elements are very high, it is diff...

Claims

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Application Information

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IPC IPC(8): C03B37/018
CPCC03B37/01807C03B2201/34
Inventor 莫琦陈伟杜城李诗愈胡福明张涛
Owner RUIGUANG TELECOMM TECH CO LTD
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