Raman spectral liquid detection method based on laser frequency doubling and hollow-core optical fibers

A technology of hollow-core optical fiber and detection method, which is applied in Raman scattering, measuring devices, material excitation analysis, etc., can solve the problems of high requirements for optical path adjustment and system stability, focusing on glass slides, and insufficient sensitivity, etc., to achieve The effect of wide application range, high measurement efficiency and high reliability

Active Publication Date: 2017-03-22
BEIJING INFORMATION SCI & TECH UNIV
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Problems solved by technology

[0003] However, Raman scattering is a kind of weak scattering, and there is a problem of insufficient sensitivity in practical operation. At present, it is more typical to adopt the method of multi-reflection enhancement. Although the multi-reflection cavity can greatly improve the Raman scattering intensity

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  • Raman spectral liquid detection method based on laser frequency doubling and hollow-core optical fibers
  • Raman spectral liquid detection method based on laser frequency doubling and hollow-core optical fibers
  • Raman spectral liquid detection method based on laser frequency doubling and hollow-core optical fibers

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[0026] The objects and functions of the present invention and methods for achieving the objects and functions will be clarified by referring to the exemplary embodiments. However, the present invention is not limited to the exemplary embodiments disclosed below; it can be implemented in various forms. The essence of the description is only to help those skilled in the relevant art comprehensively understand the specific details of the present invention.

[0027] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0028] figure 1 with figure 2 A system composition diagram 100 and a step flow chart 200 of the Raman spectroscopy liquid detection method based on laser frequency doubling and hollow-core fiber according to the present invention are respectively shown. The system composition diagram 10...

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Abstract

The invention provides a Raman spectral liquid detection method based on laser frequency doubling and hollow-core optical fibers. The method adopts a continuous laser device with the wavelength of 915 nm or 976 nm as a light source and adopts a laser resonant cavity composed of a first optical fiber Bragg grating and a second optical fiber Bragg grating, and furthermore, a narrow-line-width 532 nm laser is obtained through an active optical fiber and a lithium triborate frequency doubling crystal and a to-be-detected liquid is stimulated to generate Raman scattering light; at the same time, the liquid detection method also has the advantages of wide application range, high measuring efficiency, high reliability and the like.

Description

technical field [0001] The invention relates to a Raman spectrum liquid detection method, in particular to a Raman spectrum liquid detection method based on laser frequency doubling and hollow-core optical fiber. Background technique [0002] Raman spectrum is a kind of scattering spectrum. Raman spectroscopy is based on the Raman scattering effect discovered by Indian scientist C.V. Raman (Raman). It analyzes the scattering spectrum different from the frequency of the incident light to obtain molecular vibration and rotation information, and is applied to the study of molecular structure. a method of analysis. In terms of liquid detection, Raman spectroscopy has technical advantages such as short analysis period, simple device, and the ability to detect multiple liquids at the same time. be widely used. [0003] However, Raman scattering is a kind of weak scattering, and there is a problem of insufficient sensitivity in practical operation. At present, it is more typical...

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 祝连庆张雯姚齐峰娄小平董明利何巍庄炜
Owner BEIJING INFORMATION SCI & TECH UNIV
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