A kind of preparation method of polygonal fibre core rare-earth doped optical fibre

A kind of preparation method of polygonal fibre core rare-earth doped optical fibre

  • CN 104,678,489 B
  • Filed: 03/05/2015
  • Issued: 07/05/2019
  • Est. Priority Date: 03/05/2015
  • Status: Active Grant
First Claim
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1. a kind of preparation method of polygonal fibre core rare-earth doped optical fibre, which is characterized in that the preparation method includes following stepIt is rapid:

  • (1) outer wall of reaction tube (5) is processed into n-shaped, its inner wall is corroded, and remove impurity, wherein 5≤

    N≤

    10;

    (2) weaker zone is deposited in the pipe of the reaction tube (5);

    (3) through step (2), treated that the reaction tube (5) steeps that processing is doped in rear-earth-doped solution by described;

    (4) will by the step (3) treated, the reaction tube (5) is collapsed into prefabricated rods, be by above-mentioned preformObtain polygonal fibre core rare-earth doped optical fibre;

    The relatively thin part in the part (503) and tube wall that the reaction tube (5) for being processed to n-shaped has tube wall thicker(504), during the step (1), the position of the relatively thin part of the tube wall (504) can radially be expanded, so that pipe thickness difference increases;

    During the step (2), in the thicker part of tube wall, internal temperature is lower, therefore deposits more particles,In the relatively thin part of tube wall, internal temperature is higher, therefore deposits less particle.

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