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Device and method for eliminating reflected light noise at tail end of optical fiber and manufacturing method

A technology of reflected light and noise, applied in the field of sensing, can solve the problems of insufficient tail, knotting and smearing, and unrecoverable space, etc., to improve measurement accuracy, reduce reflected light noise, and eliminate multiple wavelength reflected light noise Effect

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 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 reflected light noise at tail end of optical fiber and manufacturing method
  • Device and method for eliminating reflected light noise at tail end of optical fiber and manufacturing method
  • Device and method for eliminating reflected light noise at tail end of optical fiber and manufacturing method

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Embodiment 1

[0038] like Figure 1-2 As shown, this embodiment provides a device, method and manufacturing method for eliminating the reflected light noise from the end of the optical fiber, and the specific technical solution is as follows:

[0039] The scheme of the present invention adopts the absorption and filtering characteristics of the surface plasmon lattice resonance to realize the absorption of the reflected light at the end of the fiber, and eliminates the influence of the noise of the reflected light at the end of the fiber on the measurement. The core part of the device of the surface plasmon lattice resonance unit is as follows: Based on metal-medium-metal ("MIM" for short) nanoarrays, surface plasmons are electromagnetic oscillations formed by the interaction of free electrons and photons in the metal surface region. The interaction between surface charge oscillations and light-wave electromagnetic fields gives surface plasmons many unique and meaningful properties, especia...

Embodiment 2

[0054] This embodiment provides a device, method and manufacturing method for eliminating reflected light noise from the end of an optical fiber, such as Figure 3-4 , compared with Embodiment 1, the main difference of this embodiment is:

[0055] The laminated structure includes a multi-layer structure, the head 4 and the tail 3 of the multi-layer structure are both metal ridges 1 , and the multi-layer dielectric and the multi-layer metal ridge 1 are alternately arranged between the head 4 and the tail 3 . Specifically, the stacked structure includes a five-layer structure, the head 4 and the tail 3 of the five-layer structure are both metal ridges 1 , and the five-layer dielectric and the four-layer metal ridge 1 are alternately arranged between the head 4 and the tail 3 . The multi-wavelength absorption is realized by changing the number of layers of the laminated structure, and the reflected light noise of multiple wavelengths at the end of the optical fiber is reduced. Co...

Embodiment 3

[0060] This embodiment provides a device, method and manufacturing method for eliminating the reflected light noise from the end of the optical fiber. Compared with Embodiment 1, the main difference of this embodiment is:

[0061] Specifically, the size of the laminated structure can be changed to achieve the purpose of eliminating the reflection at the end of the optical fiber. Specifically, the refractive index of titanium dioxide 2 is 2.65, the refractive index of air is 1.0, the side length of the square laminated structure is 1 mm, and the thickness of the head 4 is 10nm, tail 3 thickness is 100nm, titanium dioxide 2 thickness is 100nm.

[0062] Other features of this embodiment are the same as those of Embodiment 1, and will not be repeated here.

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Abstract

The invention provides a device and method for eliminating reflected light noise at the tail end of an optical fiber and a manufacturing method, the device comprises more than two layers of metal ridges and more than one layer of media, the metal ridges and the media are alternately arranged to form a laminated structure, and the head and the tail of the laminated structure are the metal ridges. Compared with the prior art, according to the technical scheme of the invention, the optical fiber sensing measurement precision is improved, the limitation on the tail end application space is reduced, and the parameter measurement and application of the optical fiber sensing technology in a micro space can be realized. The method can eliminate the multi-wavelength reflected light noise at the tail end of the optical fiber, and effectively reduces the reflected light noise at the tail end of the optical fiber. Through the manufacturing method, the laminated structure can be obtained, and the structure is attached to the tail end of the optical fiber to effectively reduce the reflected light noise of the tail end of the optical fiber.

Description

technical field [0001] The present invention relates to the field of sensing technology, and in particular, to a device, method and manufacturing method for eliminating the noise of reflected light from the end 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, et...

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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