Enhanced Raman scattering sensor

Abstract

The invention provides an enhanced Raman scattering sensor. The enhanced Raman scattering sensor comprises a branching end and a stranding end, wherein the stranding end comprises a stainless steel housing; a scattering prism is embedded into one end of the middle part of the stainless steel housing; the other end of the middle part of the stainless steel housing is connected with the branching end; the scattering prism comprises an integrally molded circular truncated cone and a cylinder extending out of the bottom of the circular truncated cone; the upper surface and the side surface of thecircular truncated cone are covered with Raman scattering enhanced plating layers; the lower surface of the cylinder is covered with a silver plating layer; an outgoing window and an incoming window are arranged at the center and one side of the silver plating layer respectively; the side surface of the cylinder is of a frosted structure; the lower surface of the cylinder is fitted with the end face of the stainless steel housing; the branching end comprises a receiving optical fiber and an incoming optical fiber; the receiving optical fiber and the incoming optical fiber penetrate through themiddle part of the stainless steel housing respectively and are connected to the incoming window and the outgoing window of the scattering prism; and a feedback optical fiber extends out of the middle part of the incoming optical fiber. By adopting an enhanced Raman scattering principle, the stability and precision of solution detection are improved.

Description

technical field [0001] The invention belongs to the technical field of laser detection, and in particular relates to an enhanced Raman scattering sensor. Background technique [0002] In the automatic production process of chemical industry, brewing, fermentation, beverage, edible oil and other industries, it is necessary to conduct real-time online monitoring of one or more components of the process product for process control. Raman spectroscopic analysis technology has been widely used in laboratory testing, portable testing and other fields due to its fast, non-destructive, simple and accurate advantages. Raman spectroscopy has high requirements for on-site working conditions and samples to be tested. When applied to online monitoring, small changes in the external environment (working conditions, temperature and humidity, etc.), fluctuations in light sources and detectors, etc. will often cause Raman spectrum baseline drift , The response intensity is unstable, and the...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an enhanced Raman scattering sensor to solve the problem of poor stability of scattered light, weak signal strength and large deviation when using the principle of Raman scattering to carry out online monitoring under harsh working conditions

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