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Optical isolator magnetic ring and preparation method thereof

An optical isolator and magnetic ring technology, which is used in the manufacture of inductors/transformers/magnets, instruments, optics, etc., can solve the problems of low yield, low production efficiency of grinding and expanding holes, etc., to reduce processing difficulty, improve yield and The effect of production efficiency

Active Publication Date: 2019-11-05
JIAOZUO MICRO MAGNET TECH
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  • Abstract
  • Description
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Problems solved by technology

In the prior art, laser drilling is performed on the cylindrical body, and then the hole is expanded by a steel wire grinder to obtain a magnetic ring that meets the size. However, due to the hard and brittle characteristics of samarium cobalt alloy, the yield rate of this method is still relatively low. Low, and the production efficiency of grinding and reaming is also very low

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  • Optical isolator magnetic ring and preparation method thereof

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Embodiment Construction

[0015] Such as figure 1 The magnetic ring of an optical isolator shown includes an annular permanent magnet. The permanent magnet includes an outer sintered layer 1 and an inner bonding layer 2. The outer sintering layer is a samarium-cobalt alloy powder melting and sintering structure, and the inner bonding layer It is a samarium-cobalt alloy powder thermosetting resin bonded structure.

[0016] The outer diameter of the permanent magnet is 2 mm, the inner diameter is 1 mm, and the thickness of the inner bonding layer is not greater than 0.2 mm.

[0017] The present invention also provides a preparation method for the magnetic ring of the optical isolator, comprising the following steps:

[0018] 1) Preparation of samarium cobalt alloy powder, the particle size of samarium cobalt alloy powder is 4~6μm;

[0019] 2) Take part of the samarium-cobalt alloy powder, add 30% thermosetting resin binder, mix and press, after heating and curing, a bonded cylinder with a diameter of 1...

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Abstract

The invention relates to an optical isolator. The optical isolator comprises an annular permanent magnet; the permanent magnet comprises an outer sintering layer and an inner adhesive layer; the outersintering layer adopts a samarium cobalt alloy powder fused and sintered structure; and the inner adhesive layer adopts a samarium cobalt alloy powder thermosetting resin adhesive structure. By virtue of the optical isolator, central hole processing difficulty can be lowered, and yield and production efficiency can be improved; and in addition, the optical isolator with the structure still adoptsthe fused and sintered structure as the main body, so that the magnetic performance is not influenced.

Description

technical field [0001] The invention relates to a magnetic ring of an optical isolator and a preparation method thereof, belonging to the technical field of preparation of optical communication components. Background technique [0002] An optical isolator is a passive optical device that only allows light to pass through in one direction. Its working principle is based on the non-reciprocity of Faraday rotation. The light reflected by the fiber optic echo can be well isolated by the optical isolator. Optical isolators mainly use the Faraday effect of magneto-optical crystals. The magnetic ring of samarium cobalt material is an important component of the optical isolator. [0003] Samarium cobalt magnetic material is a very valuable and rare powder metallurgy product. Its physical properties are hard and brittle, and its Vickers hardness is 550-600HV / MPa. Because it is very brittle and difficult to process, it cannot be drilled directly like other metal materials. In the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/055H01F7/02H01F41/02G02F1/09
CPCG02F1/093H01F1/0557H01F1/0558H01F7/021H01F41/0266
Inventor 常远熊伟东张建国刘伟伟闫红林宋瑞增
Owner JIAOZUO MICRO MAGNET TECH