Optical fiber type sensor system based on surface plasma resonance and stimulated Raman scattering

Abstract

The invention discloses an optical fiber type sensor system based on surface plasma resonance and stimulated Raman scattering. The system comprises a broadband light source, a P-type polaroid, a focusing convex lens, a polarization controller, an optical fiber beam splitter, an optical fiber inclined end, a surface plasma resonance (SPR) probe and an optical fiber spectrometer, wherein the P-type polaroid is positioned between the broadband light source and the focusing convex lens; the focusing convex lens optically couples the polarization broadband to the polarization controller; the polarization controller is connected with one input end of the optical fiber beam splitter, and the optical fiber spectrometer is connected with the other input end of the optical fiber beam splitter; the optical fiber inclined end is connected with one output end of the optical fiber beam splitter, and the SPR probe is connected with the other output end of the optical fiber beam splitter; the free end of the optical fiber inclined end is inclined; the SPR probe comprises an optical fiber; the end face of an exposed fiber core is provide with a first metal film, and the periphery of the exposed fiber core is provide with a second metal film; a nano-film is arranged on the surface of the second metal film; and a sensitive film is arranged on the nano-film. The system has the advantages of high universality, sensitivity and stability, and capable of realizing remote monitoring.

Description

technical field [0001] The invention relates to an optical fiber type sensing system based on surface plasmon resonance and stimulated Raman scattering. technical background [0002] Biochemical sensing technology is widely used in the fields of basic life science, medicine, biochemistry, environment and food detection. Traditional biosensing technology is difficult to achieve real-time online detection of biological analysis interactions, such as X-ray photoelectron spectroscopy (XPS), Auger Electron Spectroscopy (AES), etc., are expensive, have huge equipment, and harsh experimental conditions (high vacuum). Other commonly used immunoassay techniques, such as fluorescent immunoassay, generally require labeling, and the testing process is complicated and the testing time is relatively long. long. With the development of testing technology, people put forward higher requirements for the accuracy and diversity of detection. Contents of the invention [0003] In order to o...

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Problems solved by technology

[0002] Biochemical sensing technology is widely used in the fields of basic life science, medicine, biochemistry, environment and food detection. Traditional biosensing technology is difficult to achieve real-time online detection of biological analysis interactions, such as X-ray photoelectron spectroscopy (XPS), Auger Electron Spectroscopy (AES), etc., are expensive, have huge equipment, and harsh experimental conditions (high vacuum). Other commonly used immunoassay techniques, such as fluorescent immunoassay, generally require labeling, and the testing process is complicated and the testing time is relatively long. long

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