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Device and method for eliminating optical fiber end face reflected light noise and manufacturing method

An optical fiber end face, reflected light technology, applied in the field of sensing, can solve the problems of knotting and smearing of the tail end, difficult to maintain for a long time, lack of space, etc., to reduce the noise of reflected light and improve the measurement accuracy.

Pending Publication Date: 2022-06-07
SHENZHEN INST OF ADVANCED TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these methods can work to a certain extent, there are some problems, such as the matching glue is easy to fall off, the knots are easy to scatter, and it is difficult to maintain for a long time.
Especially for some small space occasions where the sensing optical fiber needs to be sealed, once the end face treatment fails, it cannot be restored at all or there is insufficient space to tie the end and apply a large volume of matching glue

Method used

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  • Device and method for eliminating optical fiber end face reflected light noise and manufacturing method
  • Device and method for eliminating optical fiber end face reflected light noise and manufacturing method
  • Device and method for eliminating optical fiber end face reflected light noise and manufacturing method

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Effect test

Embodiment 1

[0062] This embodiment provides a device, method and manufacturing method for eliminating the reflected light noise from the end face of an optical fiber:

[0063] Specifically, the refractive index of silicon dioxide 2 is 1.41, the refractive index of air is 1.0, the thickness of silicon substrate 4 is 400 nm, the refractive index of silicon substrate 4 is 1.43, the side length of square nano-columns is 160 nm, and the silicon dioxide 2 The thickness of 130nm, the nanopillar spacing in the y direction is 450nm, the spacing in the x direction is 200nm, the thickness of the first metal ridge 1 is 130nm, and the thickness of the second metal ridge 3 is 130nm.

Embodiment 2

[0065] This embodiment provides a device, method and manufacturing method for eliminating the reflected light noise from the end face of an optical fiber:

[0066] Specifically, the refractive index of silicon dioxide 2 is 1.49, the refractive index of air is 1.0, the thickness of silicon substrate 4 is 600 nm, the refractive index of silicon substrate 4 is 1.55, the side length of square nano-columns is 200 nm, and the silicon dioxide 2 The thickness of 180nm, the nanopillar spacing in the y direction is 200nm, the spacing in the x direction is 450nm, the thickness of the first metal ridge 1 is 180nm, and the thickness of the second metal ridge 3 is 180nm.

Embodiment 3

[0068] This embodiment provides a device, method and manufacturing method for eliminating reflected light noise from the end face of an optical fiber, such as figure 2 As shown, compared with Embodiment 1, the main difference of this embodiment is:

[0069] Specifically, the refractive index of the silicon dioxide 2 is 1.45, the refractive index of air is 1.0, the thickness of the silicon substrate 4 is 500 nm, the refractive index of the silicon substrate 4 is 1.52, the side length of the square nano-column is 180 nm, and the silicon dioxide 2 The thickness of the nano-pillars is 160 nm, the spacing of the nano-pillars in the y-direction is 450 nm, the spacing in the x-direction is 400 nm, the thickness of the first metal ridge 1 is 140 nm, and the thickness of the second metal ridge 3 is 140 nm. Reflection spectrum, the peak value is 681 nm , the reflection intensity is 27%.

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Abstract

The invention provides a device and method for eliminating optical fiber end face reflected light noise and a manufacturing method. The device comprises a substrate and a plurality of nano columns arranged on the substrate. The nanorod comprises a first metal ridge, a medium and a second metal ridge which are sequentially stacked, and the first metal ridge is arranged on the substrate; a distance is formed between the adjacent nano-columns on the substrate, and each nano-column has a preset size. Compared with the prior art, according to the technical scheme of the invention, the optical fiber sensing measurement precision is improved, the limitation on a tail end application space is reduced, and parameter measurement and application of an optical fiber sensing technology in a micro space can be realized. Through the method, reflected light noise in different wavelength ranges can be eliminated, and reflection of the end face of the optical fiber is effectively reduced. By means of the manufacturing method, the device is attached to the end face of the optical fiber, and reflected light noise at the tail end of the optical fiber can be effectively reduced.

Description

technical field [0001] The present invention relates to the field of sensing technology, and in particular, to a device, a method and a manufacturing method for eliminating reflected light noise from an end face of an optical fiber. Background technique [0002] The optical fiber sensor has the characteristics of small size, light weight, high sensitivity, no electromagnetic interference, long life, etc. It can be used in environments such as strong electromagnetic interference, high temperature, and high pressure. extensive attention. [0003] In the optical fiber sensing technology, the point light beam of the laser is diffused into parallel waves, which are divided into the reference optical path and the measurement optical path by the coupler. The external physical parameters (pressure, temperature, contact force, vibration, attitude, shape, etc.) cause the back of the optical fiber. Reflected light represents changes in parameters such as intensity, frequency, phase, e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/00
CPCG02B5/008
Inventor 董玉明张亮石云杰李光元朱子爵焦国华吕建成
Owner SHENZHEN INST OF ADVANCED TECH
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