Fiber-integrated multi-helical-core optical fiber SPR sensing array chip

A technology integrating multi-screw and sensor array, which is applied in the direction of material analysis, measuring devices, and instruments through optical means, can solve the problems of low detection efficiency, complicated operation, and low degree of automation, and achieve high resolution and simple operation , Great cost-effective effect

Active Publication Date: 2016-09-21
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Each sensing unit in the sensor chip has different SPR resonance angles, which can realize the analysis and detection of multiple different substances in the sample

Method used

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  • Fiber-integrated multi-helical-core optical fiber SPR sensing array chip
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  • Fiber-integrated multi-helical-core optical fiber SPR sensing array chip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1: Preparation of fiber-integrated triple-helical core array SPR sensor chip

[0061] Such as figure 2 (a) and figure 2 (b) shows the fiber-integrated triple-helical core array SPR sensor chip based on the symmetrical three-core optical fiber. The three optical channels formed by the three optical fiber cores constitute the three-beam Michelson interferometer and the three-beam Mach-Zehnder interferometer.

[0062] Such as figure 2 The Michelson interferometer based on the symmetrical three-core fiber integrated triple-helical core array SPR sensor chip is shown, and its structure includes: broadband light source 1, three-port fiber circulator 2, signal processing unit 3, fiber cladding 4, fiber tapering The coupling area 5, the D-shaped polishing surface 6, the nano-gold film 7 with a certain thickness, the optical fiber reflection end 8 and three fiber cores 9 symmetrically distributed. The production method is as follows: firstly, using a symmetrically...

Embodiment 2

[0063] Example 2: Preparation of fiber-integrated multi-helical core array SPR sensor chip

[0064] In addition to being applicable to double-core, three-core, four-core and seven-core optical fibers with a central core, the present invention, such as figure 1 (a), figure 2 (a), image 3 and Figure 4 shown. It can also be applied to dual-core, triple-core, quad-core, and six-core optical fibers with symmetrical distribution without a central core, such as Figure 5 , Figure 6 , Figure 7 , Figure 8 shown. Its preparation method is the same as the method described in Example 1, and will not be repeated here.

Embodiment 3

[0065] Embodiment 3: the method for local removal of multi-helical core optical fiber surface

[0066] In order to expose the local helical fiber cores, in addition to the method of plane grinding and polishing on the side, the method of mask chemical etching can also be used for local removal, so that multiple helical fiber cores are exposed, and then the gold nanofilm is processed. Plating, thereby preparing the SPR array sensor chip, such as Figure 9 shown.

[0067] In order to expose the local spiral fiber core, a single side surface is used for plane grinding and polishing, and multiple sides can also be used for plane grinding and polishing, thereby further increasing the number of SPR sensor array units and increasing the total number of optical fiber SPR chip sensing units .

[0068] Ultraviolet laser or femtosecond laser micromachining technology can also be used to perform selective local microgroove processing on the surface of the multi-helical core fiber, so th...

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Abstract

The invention relates to a fiber-integrated multi-helical-core optical fiber SPR sensing array chip and belongs to the technical field of optical fiber sensing, and particularly relates to the fiber-integrated multi-helical-core optical fiber SPR sensing array chip which can be widely used in the fields of bio-sensing, chemical analysis, medicine researching, food safety, environment monitoring, medical diagnosis and the like. The fiber-integrated multi-helical-core optical fiber SPR sensing array chip is composed of an optical fiber cladding (1), a double-core or multi-core optical fiber tapering coupled zone (2), a D-type polished surface (3), a gold nano film in certain thickness (4), a center fiber core (5) and an eccentric fiber core (6). The sensing units in the sensing chip have different SPR resonance angles, so that the chip can analyze and detect various different substances in a sample simultaneously in one time. The chip overcomes the defects of complex operations, low automation degree, low detection efficiency and the like in the prior art.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, and specifically relates to a fiber-integrated multi-helical core optical fiber SPR sensing array that can be widely used in the fields of biological sensing, chemical analysis, drug research and development, food safety, environmental monitoring, and medical diagnosis. chip. Background technique [0002] Optical fiber surface plasmon resonance (Surface Plasmon Resonance, SPR) sensor combines multi-helical core optical fiber technology and ultra-high sensitivity SPR sensing technology, which can realize real-time monitoring and remote transmission functions. Surface plasmon resonance sensors are very sensitive to small changes in the medium composition at the interface, and have been widely used in many fields such as surface detection, biomedicine, and environmental monitoring. In the 1990s, the first optical fiber surface plasmon resonance sensor (FO-SPR) was made, which showed t...

Claims

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Application Information

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IPC IPC(8): G01N21/552
CPCG01N21/554G01N2201/0853G01N2201/088
Inventor 苑立波何学兰张晓彤
Owner GUILIN UNIV OF ELECTRONIC TECH
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