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A kind of preparation method of magneto-optic optical fiber with high verdet constant

A technology of optical fiber preform and constant, which is applied in cladding optical fiber, optical waveguide light guide, optical, etc., can solve the problem of low nanometer deposition efficiency, and achieve the effect of excellent magneto-optical characteristics, easy production, and good thermal stability

Active Publication Date: 2020-10-23
T&S COMM
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Problems solved by technology

However, the efficiency of nano-deposition is low, and it is not suitable for depositing cladding and core layers of optical fiber preforms with large thickness.

Method used

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  • A kind of preparation method of magneto-optic optical fiber with high verdet constant

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] The specific embodiment of the present invention proposes a method for preparing a high Verdet constant magneto-optical optical fiber, which is used to prepare a terbium-doped silica fiber with a high Verdet constant. The optical fiber prepared by the preparation method has high doping concentration and uniformity. Good, excellent magneto-optical characteristics, good thermal stability, simple structure, easy production, etc., suitable for high-current sensors, optical isolators, nonlinear optics, magneto-optical switches, magneto-optical modulators, etc. The preparation method includes:

[0022] Deposition of GeO on the Inner Surface of Substrate Tube by Modified Chemical Vapor Deposition (MCVD) 2 and SiO 2 ; Utilize the high-temperature evaporation deposition method to uniformly deposit terbium oxide particles on the inner surface of...

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Abstract

The invention discloses a preparation method for a high-Verdet constant magneto-optic optical fiber. The method includes the following steps that: a modified chemical vapor deposition method is utilized to deposit GeO2 and SiO2 on the inner surface of a base pipe; a high-temperature evaporation deposition method is utilized to uniformly deposit terbium oxide particles on the inner surface of the base pipe; the modified chemical vapor deposition method is utilized to sequentially deposit an outer cladding layer, an inner cladding layer and a doped core layer on the inner surface of the base pipe, and high temperature shrinkage is performed, so that a solid rod can be obtained, namely an optical fiber preformed rod can be obtained; the optical fiber preformed rod is drawn, so that an opticalfiber can be obtained. With the preparation method of the invention adopted, high-concentration terbium oxide doping can be performed with good doping uniformity realized, and the Verdet constant ofthe optical fiber can be improved.

Description

technical field [0001] The invention relates to the field of optical fiber technology, in particular to a method for preparing a high Verdet constant magneto-optical optical fiber. Background technique [0002] In the power system, the conventional technology for measuring current is a current transformer based on the principle of electromagnetic mutual inductance. However, with the rapid progress and development of the power industry, the disadvantages of traditional electromagnetic transformers are becoming more and more prominent, such as large size, heavy weight, Difficult transportation, susceptibility to electromagnetic interference, poor insulation, serious distortion of long-distance transmission signals, large measurement errors, etc. To overcome these shortcomings, people are looking for optical sensing methods to measure current, such as using fiber optic sensing technology. Optical fiber has many advantages, including strong anti-electromagnetic interference, go...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G02F1/095
Inventor 肖湘杰文建湘卫广远
Owner T&S COMM
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