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A kind of elliptical polarization maintaining optical fiber and its preparation method

A polarization-maintaining optical fiber and optical fiber preform technology, which can be applied to polarization optical fibers, cladding optical fibers, glass manufacturing equipment, etc., can solve the problems of low birefringence optical fibers being sensitive to interference, expensive, and difficult to prepare circular polarization-maintaining fibers. High Faraday effect, improved paramagnetism, and the effect of using slender

Active Publication Date: 2019-05-03
上海傲世控制科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the preparation method of circular polarization-maintaining optical fiber is relatively difficult, academician Huang Hongjia in my country has led a team to carry out research and development since 1990, and so far only a very small number of "circular polarization-maintaining" optical fiber samples have been produced.
At present, most circular polarization-maintaining optical fibers are imported, and the price is extremely expensive
Currently on the market, low birefringence fibers are often used instead of circular polarization-maintaining fibers to prepare current sensors, but low birefringence fibers are extremely sensitive to interference

Method used

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  • A kind of elliptical polarization maintaining optical fiber and its preparation method
  • A kind of elliptical polarization maintaining optical fiber and its preparation method
  • A kind of elliptical polarization maintaining optical fiber and its preparation method

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Embodiment 1

[0033] A kind of elliptical polarization maintaining optical fiber, its structure is as figure 1 As shown, the cross-sectional structure of the polarization-maintaining optical fiber is an elliptical core layer 4 from the inside to the outside, the inner cladding layer 3 wrapping the core layer 4, and the stress action zone layer 2 wrapping the inner cladding layer 3, And the outer cladding layer 1 wrapping the stress application zone layer 2, the core layer 4 is also doped with 800ppm Tb 2 o 3 and 250ppm CeO 2 , the roundness of the core layer 4 is 60%, and the diameter of the elliptical polarization-maintaining fiber is 120 μm, wherein, the major axis length of the core layer 4 and the inner cladding layer 3, the stress action zone layer 2 and the outer cladding layer 1 has a diameter ratio of 4:40:100:125.

[0034] The preparation method of the above-mentioned elliptical polarization maintaining optical fiber comprises the following steps:

[0035] (1) Pass SiCl into th...

Embodiment 2

[0044] An elliptical polarization-maintaining optical fiber, the cross-sectional structure of the polarization-maintaining optical fiber is an elliptical core layer 4 from the inside to the outside, the inner cladding 3 wrapping the core layer 4, and the stress effect of wrapping the inner cladding 3 zone layer 2, and the outer cladding layer 1 wrapping the stress action zone layer 2, and the core layer 4 is also doped with 1000ppm Tb 2 o 3 and 300ppm CeO 2 , the roundness of the core layer 4 is 90%, and the diameter of the elliptical polarization-maintaining fiber is 130 μm, wherein, the major axis length of the core layer 4 and the inner cladding layer 3, the stress action zone layer 2 and the outer cladding layer 1 has a diameter ratio of 4:40:100:125.

[0045] The preparation method of the above-mentioned elliptical polarization maintaining optical fiber comprises the following steps:

[0046] (1) Pass SiCl into the quartz substrate tube at a molar ratio of 1.2:1 4 and...

Embodiment 3

[0054] An elliptical polarization-maintaining optical fiber, the cross-sectional structure of the polarization-maintaining optical fiber is an elliptical core layer 4 from the inside to the outside, the inner cladding 3 wrapping the core layer 4, and the stress effect of wrapping the inner cladding 3 zone layer 2, and the outer cladding layer 1 wrapping the stress action zone layer 2, and the core layer 4 is also doped with 900ppm Tb 2 o 3 and 275ppm CeO 2 , the roundness of the core layer 4 is 75%, and the diameter of the elliptical polarization-maintaining fiber is 125 μm, wherein, the major axis length of the core layer 4 and the inner cladding layer 3, the stress action zone layer 2 and the outer cladding layer 1 has a diameter ratio of 4:40:100:125.

[0055] The preparation method of the above-mentioned elliptical polarization maintaining optical fiber comprises the following steps:

[0056] (1) Pass SiCl into the quartz substrate tube at a molar ratio of 1.1:1 4 and ...

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Abstract

The invention relates to an elliptical polarization maintaining optical fiber and a preparation method therefor. The section structure of the elliptical polarization maintaining optical fiber sequentially comprises an elliptical fiber core layer, an inner cladding layer wrapping the fiber core layer, a stress action region layer wrapping the inner cladding layer and an outer cladding layer wrapping the stress action region layer from the inside to the outside. The fiber core layer is also doped with Tb2O3 (800-1000ppm) and CeO2 (250-300ppm). The elliptical polarization maintaining optical fiber is prepared through the following steps: (1), preparing a corresponding optical fiber prefabricated rod according to the requirements; (2), fixing the prepared optical fiber prefabricated rod on a rotating wiredrawing machine, and operating the rotating wiredrawing machine for wiredrawing, thereby obtaining the elliptical polarization maintaining optical fiber. Compared with the prior art, the prepared optical fiber is higher in Faraday effect, and is very high in radiation resistance performance. A manufactured electromagnetic field detector is high in precision, uses a short optical fiber, and is suitable for a strong radiation environment.

Description

technical field [0001] The invention relates to the field of special optical fibers, in particular to an elliptical polarization-maintaining optical fiber and a preparation method thereof. Background technique [0002] The detection equipment of the elevated power grid is bulky, outdated, and has low precision. Bothering industry experts and scholars around the world. It has been demonstrated that only circular polarization-maintaining optical fibers can transmit circularly polarized light, resist interference, and have a strong Faraday effect. The optical current transducer (OCT) made of this optical fiber can replace the old-fashioned detection instrument, and has small volume and high precision. However, because the preparation method of circular polarization-maintaining optical fiber is relatively difficult, academician Huang Hongjia of my country has led a team to carry out research and development since 1990, and so far only a very small number of "circular polarizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/024G02B6/036C03B37/018C03B37/025
CPCC03B37/018C03B37/01853C03B37/02709C03B37/02745C03B2203/12C03B2203/20C03B2203/302C03B2205/07G02B6/024G02B6/03694
Inventor 申云华王毅强
Owner 上海傲世控制科技股份有限公司
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