Optical fiber probe enhanced type portable Raman spectrometer

Abstract

The invention discloses an optical fiber probe enhanced type portable Raman spectrometer. The optical fiber probe enhanced type portable Raman spectrometer comprises a Raman spectrometer main unit, an optical fiber Raman probe and an optical fiber SERS (surface enhanced Raman scattering) probe, wherein a laser, a detector and a switching power supply are arranged in the Raman spectrometer main unit, and an FC / PC optical fiber interface directly connected with the laser and an SMA905 optical fiber interface directly connected with the detector are reserved on a front panel of the Raman spectrometer main unit; the optical fiber Raman probe comprises an optical coupling module, an input optical fiber, an output optical fiber and a Raman detection end; one end of the input optical fiber and one end of the output optical fiber are connected with the two optical fiber interfaces of the Raman spectrometer main unit respectively; the other ends of the input optical fiber and the output optical fiber are jointly connected into the optical coupling module, and the optical coupling module is connected with the Raman detection end simultaneously; the Raman detection end is in direct coupling connection with the optical fiber patch cord end of the optical fiber SERS probe. The optical fiber probe enhanced type portable Raman spectrometer has the advantages of being miniaturized, high in flexibility, good in repeatability, simple in detection process and the like.

Description

technical field [0001] The invention belongs to the field of surface-enhanced Raman spectroscopic detection instruments, and in particular relates to an optical fiber probe enhanced portable Raman spectrometer. Background technique [0002] Raman spectroscopy is closely related to the vibration and rotational energy levels of molecules, and has molecular "fingerprint" characteristics. It is often used in the detection and identification of various molecules, and has important application prospects in analytical chemistry, biomedicine, environmental science, food safety and other fields. . Usually, the molecular Raman scattering cross section is very small, the Raman signal is weak, and it is difficult to detect directly. Thanks to the development of laser technology and CCD detection technology, people have developed a high-sensitivity micro confocal Raman spectrometer to detect weak Raman signals. However, the instrument is bulky and heavy, and is usually only suitable fo...

AI Technical Summary

Problems solved by technology

However, limited by the experimental preparation method, it is usually difficult to achieve the uniformity of SERS hot spots (hotspots) in the macro-scale range, which affects the repeatability and reliability of Raman detection, which is not conducive to practical detection applications.

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