Rare earth-doped optical fiber perform and preparation method thereof

An optical fiber preform and rare earth technology, which is applied to glass manufacturing equipment, manufacturing tools, etc., can solve the problems of low efficiency, large heat generation, and low longitudinal uniformity of optical fiber preforms.
CN104058587AActive Publication Date: 2014-09-24SHENZHEN XINAOKE CABLE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN XINAOKE CABLE
Publication Date
2014-09-24

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Abstract

The invention provides a preparation method of a rare earth-doped optical fiber perform. The method comprises the following steps: 1) depositing a loose core layer on the inner surface of a quartz deposit tube; 2) soaking the quartz deposit tube with the loose core layer deposited on the inner surface obtained in the step 1) into a solution containing a rare-earth element, and releasing the solution containing the rare-earth element at the release speed obtained in the formula a after soaking the head of the quartz deposit tube, wherein the release speed (mm / min) is L / (3h*L / 400mm-280h.(mm / min) / V) / 60 in the formula a; 3) sequentially drying, sintering and melting the quartz deposit tube soaked in the step 2), so as to obtain the rare earth-doped optical fiber perform. The release speed of the solution containing the rare-earth element is controlled according to the formula a, the doping longitudinal uniformity of the rare-earth element is improved, and energy loss caused by a rare-earth ion cluster is also avoided, so that the longitudinal optical fiber uniformity of the optical fiber perform is improved.
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Description

technical field

[0001] The invention belongs to the field of optical fiber preforms, in particular to a rare earth-doped optical fiber preform and a preparation method thereof. Background technique

[0002] Optical fibers are drawn in proportion from optical fiber preforms, which usually consist of a core with a higher refractive index and a cladding with a lower refractive index. At present, optical fiber is mainly used for communication transmission.

[0003] In the prior art, there are several methods for producing optical fiber preforms, which can be divided into two categories according to the manufacturing method of the optical fiber refractive index profile: outside the tube deposition method, including the vapor axial deposition method (vapor axial deposition method) , VAD) and outside vapor deposition (outside vapor deposition, OVD); tube deposition method: including modified chemical vapor deposition (modified chemical vapor deposition, MCVD) and plasma chemical v...

Claims

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