Surface-enhanced Raman scattering optical fiber probe

A surface-enhanced Raman, fiber-optic probe technology, applied in Raman scattering, coupling of optical waveguides, material analysis by optical means, etc. , to achieve the effect of simple structure, improved detection sensitivity and easy production

Inactive Publication Date: 2010-05-26
SHANGHAI UNIV
View PDF0 Cites 35 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in the end-face treatment of D-type optical fiber, although the structure is simple and the process does not require skills, it must be pre-treated. The process is difficult to grasp and does not have repeatability, so it is

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Surface-enhanced Raman scattering optical fiber probe
  • Surface-enhanced Raman scattering optical fiber probe

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0020] A preferred embodiment of the present invention is described as follows with reference to the drawings:

[0021] reference figure 1 , The fiber probe for surface enhanced Raman scattering provided by the present invention includes a single-mode or multi-mode fiber (1) for transmitting / receiving Raman scattering, a section of tapered fiber (2) and a quartz microsphere ( 3) The tapered optical fiber (2) is formed by immersing in hydrofluoric acid for chemical corrosion and high temperature melting to draw a taper, and its tip is welded with a quartz microsphere (3) at high temperature; at the same time, it is used for transmitting / receiving The tapered optical fiber uses the evanescent wave transmitted from the tapered area to excite the solution molecules to be tested adsorbed on the tapered area and the surface of the quartz microsphere (5); in addition, the tapered optical fiber and the surface of the quartz microsphere are coated with a metal nanoparticle layer (4), can...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a surface-enhanced Raman scattering optical fiber probe, comprising an optical fiber which can be simultaneously used for transmitting exciting light and receiving Raman scattering spectrum, a tapered optical fiber and one quartz microballoon, wherein the tapered optical fiber is formed on one end of the optical fiber, and then one quartz microballoon is thermally welded on the tip of the tapered optical fiber; when the exciting light passes through the tapered optical fiber and the quartz microballoon, evanescent waves transmitted by the tapered optical fiber and the quartz microballoon can excite the Raman spectrum of a solution or a gas molecule to be tested; meanwhile, metal nano particles are coated on the optical fiber and the surface of the quartz microballoon, so that the Raman scattering strength can be enhanced. In addition, a sensing structure of the combination of the tapered optical fiber and the quartz microballoon also has the functions of reflecting, focusing and collecting the surface-enhanced Raman scattering spectrum. The optical fiber probe is combined with a monochromatic source and a high-sensitivity Raman spectrometer so that a Raman detection sensing device can be formed. The invention has simple structure, strong capacity of resisting disturbance and high sensitivity, thereby being suitable for information acquisition and transmission of on-line analysis occasions, real-time detection occasions, live sample analysis occasions, trace hazardous and noxious substance measurement occasions and the like.

Description

technical field [0001] The invention relates to a surface-enhanced Raman scattering optical fiber probe, which belongs to the technical field of optical fibers and sensors. Background technique [0002] In recent years, food safety is facing great challenges and people's health is threatened, so the detection of low-concentration trace substances has become a research hotspot. Compared with other spectra, Raman spectroscopy can provide rich molecular structure and molecular vibration information, so it has become a powerful tool for material analysis and material identification. But in the process of practical application, since the Raman scattering cross section is 10 -30 The order of magnitude is only one thousandth of Rayleigh scattering, and it is easily overwhelmed by the fluorescent background, thus limiting its application in various fields. If metals with different forms of roughening are used as substrates, the Raman scattering intensity can be increased by 10 5 ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01N21/65G01N21/01G02B6/26
Inventor 陈振宜王廷云庞拂飞陈娜刘琳张琨柏华
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap