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Sealing optical fiber device at low temperature

A sealing device and optical fiber technology, which is applied to the coupling of optical waveguides and other directions, can solve the problems of reduced sealing performance, high cost, and small number of sealed optical fibers, and achieve the effects of simple sealing structure, simple method and low cost.

Inactive Publication Date: 2009-10-07
金山研究(大连)核磁共振科技有限公司
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Problems solved by technology

Chinese patent 200510016673.7 uses a sealing rubber pad to seal the optical fiber, but this method can only be used in the normal temperature range
At low temperature, the sealing performance will be greatly reduced due to the lack of elasticity of the rubber pad
However, if the sealing method of ceramic sealing or glass sealing is to be used, ceramic or glass sealing is required, the processing procedures are complicated, the cost is high, and the number of sealed optical fibers per unit area is small

Method used

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  • Sealing optical fiber device at low temperature
  • Sealing optical fiber device at low temperature
  • Sealing optical fiber device at low temperature

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 1 As shown, a metal layer 2 is coated on the outer surface of the optical fiber 1 by magnetron sputtering. The thickness of the metal layer 2 is 0.5mm-1mm, and the length of the metal layer 2 is 10mm greater than the height of the fiber sealing hole of the sealing flange. -15mm.

[0016] Such as figure 2 As shown, an optical fiber sealing hole 4 is opened in the center of the sealing flange 3, and a sealing groove 5 is formed on the lower end surface. The sealing flange 3 is made of stainless steel, and the sealing groove 5 has a width of 0.5-0.7mm and a depth of 0.4-0.6mm. After the optical fiber sealing hole 4 is sealed, metal indium wire is filled in the sealing groove 5 of the optical fiber flange, the sealing flange 3 is pressed tightly on the sealing port of the low-temperature container by screws, and the low-te...

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Abstract

This is a device for sealing optical fiber at low temperature. The invention of optical fiber sealing device consists of the sealing flange, optical fiber, and metal layer. Sealing flange center has many optical fiber sealing holes, with a metal layer coated on the surface of optical fiber. The invention of optical fiber sealing method is to insert optical fibers plated with metal layer into the sealing holes, and use solder to fill the gap between the sealing flange and optical fiber metal layer so that the sealing flange and the optical fiber bond and form seal. This invention features simple sealing structure, simple method and low cost, which can be effective in sealing the optical fiber at low temperature in the container. The good sealing performance may easily ensure the high vacuum in the container at low temperature.

Description

technical field [0001] The present invention relates to a device for sealing optical fibers, in particular to a device for sealing optical fibers at low temperature. Background technique [0002] Optical fibers with quartz glass as the main material have the characteristics of high temperature resistance, corrosion resistance, and good thermal stability. It can be used at 1100°C for a long time, and the maximum operating temperature can reach 1450°C for a short time. Except for hydrofluoric acid, quartz glass hardly reacts with other acids. Its acid resistance is 30 times that of ceramics and 150 times that of stainless steel. Its chemical stability at high temperatures is unmatched by any other engineering materials. of. The thermal expansion coefficient of quartz glass is extremely small, and it can withstand severe temperature changes. When quartz glass is heated to about 1100°C, it will not burst when placed in room temperature. The optical fiber sensor made of optica...

Claims

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Application Information

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IPC IPC(8): G02B6/36
Inventor 胡新宁王秋良
Owner 金山研究(大连)核磁共振科技有限公司
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