Raman Spectroscopy Test System

Abstract

The invention discloses a tunable Raman spectrum testing system. The Raman spectrum testing system comprises a wide spectrum monochromatization module, an optical path coupling and output module, and a signal detection module. The wide spectrum monochromatization module comprises a super-continuum white light source, which is used to output wide spectrum excitation light; a monochromatization unit, which is used to filter the wide spectrum excitation light to acquire monochromatic light; the optical path coupling and output module, which is used to irradiate the monochromatic light on a sample surface, and is used to acquire Raman signal light after excitation processing; the signal detection module, which is used to receive the Raman signal light for detection, and is used to acquire a Raman spectrum of a sample. The monochromatic light unit comprises a grating and a first reflector, and by adjusting the deflection angle of the grating and the first reflector with respect to the super-continuum white light source, the monochromatic light having different wavelengths are changed to be reflected to a position of a diaphragm. The super-continuum white light source is used to provide wide spectrum excitation light, and the tunable Raman spectrum having the optical wavelengths in a range from 400nm to 2400nm is measured and excited, and therefore a wavelength tunable laser, which is high in price and inconvenient in operation, is not required, and the wide-range resonant Raman spectrum measurement is realized conveniently.

Description

technical field [0001] The invention belongs to the technical field of microscopic spectrometers, and more specifically relates to a Raman spectrum testing system. Background technique [0002] As an efficient and non-destructive characterization technique for detecting material components and lattice vibrations, Raman spectroscopy is widely used in many fields such as physics, chemistry, biomedicine, and materials science. Resonance Raman spectroscopy is based on conventional Raman spectroscopy, using excitation light that resonates with the energy level of the sample to be tested to excite the Raman signal, which can make the Raman signal of the sample to be tested resonantly enhanced by several orders of magnitude. In this way, the relevant electronic band structure information of the sample to be tested can be obtained by measuring the curve of the Raman signal intensity changing with the wavelength of the excitation light (hereinafter referred to as "resonance profile")...

AI Technical Summary

Problems solved by technology

This makes it very expensive to test the resonance profile of Raman spectroscopy using lasers with discrete wavelengths

For a continuous tunable laser, in principle, an infinite number of Raman filters are required to complete the test of the fine Raman spectral resonance profile, and custom non-standard Raman filters are very expensive, which limits the single-grating Raman Application of Mann Spectrometer in Resonance Profile Testing of Raman Spectroscopy

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