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Surface-enhanced raman scattering sensor detector based on optical fiber fuse-tapered coupler

A technology of surface-enhanced Raman and optical fiber coupler, which is applied in Raman scattering, optical waveguide coupling, material excitation analysis, etc., can solve the problems of low scattering intensity and limited application, and achieve low cost, easy manufacture, and simple structure Effect

Active Publication Date: 2011-07-20
SHANGHAI UNIV
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Problems solved by technology

However, under normal circumstances, due to the small Raman light scattering intensity of molecules or atoms, it is only 10 of the incident light. -10 , while overlapping with an intrinsically stronger fluorescent signal, limiting its potential applications

Method used

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  • Surface-enhanced raman scattering sensor detector based on optical fiber fuse-tapered coupler
  • Surface-enhanced raman scattering sensor detector based on optical fiber fuse-tapered coupler
  • Surface-enhanced raman scattering sensor detector based on optical fiber fuse-tapered coupler

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Embodiment Construction

[0014] A preferred embodiment of the present invention is described as follows in conjunction with accompanying drawing: See figure 1 , the surface-enhanced Raman scattering sensing detection device based on the fiber-cone fusion-cone coupling effect includes two monochromatic light sources 1, 2, a 2×2 fusion-cone fiber coupler 9 and two high-sensitivity Raman spectrometers 11, 12. The two monochromatic light sources 1, 2 pass through a polarizing plate 3, 4, a focusing lens 5, 6, a fiber coupling platform 7, 8 and the 2×2 fused tapered fiber coupler 9 Connected to the two high-sensitivity Raman spectrometers 11, 12, the 2 × 2 fused-cone fiber coupler 9 is placed in the solution or gas 10 to be measured; in the 2 × 2 fused-cone fiber coupler 9, the evanescent wave excites the solution or gas molecules to be measured adsorbed by the metal nanoparticle layer on the surface of the optical fiber to generate an enhanced Raman spectrum, which is coupled back into the optical fiber t...

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Abstract

The present invention relates to a surface-enhanced raman scattering torquemaster based on an optical fiber fuse-tapered coupler, comprising two monochromatic light sources, a 2*2 fuse-tapered optical fiber coupler and two high-sensitivity raman spectrometers. The two monochromatic light sources are connected to the two high-sensitivity raman spectrometers sequentially through two polaroid sheets, two focusing lens, two optical fiber coupling platforms and the 2*2 fuse-tapered optical fiber coupler; the 2*2 fuse-tapered optical fiber coupler is positioned in the solution or the gas to be tested; on the fused tapering zone part of the 2*2 fuse-tapered optical fiber coupler, evanescent wave excites the solution or gas molecule to be tested which is absorbed by a optical fiber surface metal nanometer particles layer, so as to generate raman spectrum, couple into the optical fiber through the optical fiber fused tapering zone, and transmit to the high-sensitivity raman spectrometers, to detect the raman spectrum of the solution or the gas molecule to be tested. The device has simple structure, strong anti-interference capacity and high sensitivity, and is applicable to various fields such as on-line analysis, real-time detection, biopsy sample analysis and the like.

Description

Technical field: [0001] The invention relates to a surface-enhanced Raman scattering sensing and detecting device based on optical fiber melting cone coupling effect, which belongs to the technical field of optical fibers and sensors. Background technique: [0002] Compared with the existing detection technology, the main advantage of Raman spectroscopy is that it can obtain rich information about molecular vibration and molecular structure without any sampling pretreatment of the substance to be tested. However, under normal circumstances, due to the small Raman light scattering intensity of molecules or atoms, it is only 10 of the incident light. -10 , while overlapping with an intrinsically stronger fluorescent signal, limiting its potential applications. Until 1974, Fleischmann et al. discovered the Surface-enhanced Raman scattering (Surface-enhanced Raman scattering, SERS) effect for the first time. In 1977, Jeanmaire and Van Duyne studied the nature of this phenomeno...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65G02B6/26
Inventor 王廷云陈振宜庞拂飞陈娜刘琳付兴虎
Owner SHANGHAI UNIV
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