Totally-reflective femtosecond stimulated Raman spectrometer

A stimulated Raman and total reflection technology, applied in the field of spectrometers, can solve problems such as influence, and achieve the effect of avoiding optical dispersion, continuously adjustable wavelength and spectral width

Active Publication Date: 2019-12-20
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a total reflection femtosecond stimulated Raman spectrometer to solve the influence of the tran

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  • Totally-reflective femtosecond stimulated Raman spectrometer

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Embodiment 1

[0025] like figure 1 As shown, this embodiment discloses a total reflection femtosecond stimulated Raman spectrometer, which mainly includes a light source module, two beam splitter mirrors, two sets of optical delay lines, mirror groups, concave mirror CM, A diaphragm, a spectral filtering module F1, and a first spectrometer D1. The two beam splitters are respectively a first beam splitter BS1 and a second beam splitter BS2. The two sets of optical delay lines are the first optical delay line DL1 and the second optical delay line DL2 respectively. The reflective mirror group is composed of sixteen reflective mirrors, which are respectively the first reflective mirror M1 to the sixteenth reflective mirror M16.

[0026] Specifically, the femtosecond pulse laser generated by the light source module passes through the first beam splitter BS1 and is divided into two laser beams, the first laser beam is a reflected beam, which is used as excitation pump light and passes through t...

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Abstract

The invention discloses a totally-reflective femtosecond stimulated Raman spectrometer. The Raman spectrometer comprises a light source module, two beam splitters, two optical delay lines, a reflectorset, a concave mirror, a diaphragm, a spectral filtering module and a first spectrometer, wherein a femtosecond pulse laser generated by the light source module is split into two laser beams after passing through the first beam splitter, the reflected beam serves as actinic pump light and focuses on a sample after passing through a first reflector, a second reflector, a third reflector, the firstoptical delay line, a fourth reflector, a fifth reflector, a sixth reflector, a seventh reflector and the concave mirror sequentially; the transmitted beam is reflected after passing through the second beam splitter, serves as detection light and focuses on the sample after passing through an eighth reflector, a ninth reflector, a tenth reflector, an eleventh reflector, the seventh reflector andthe concave mirror sequentially, and the transmitted light is collected by the first spectrometer after passing through the diaphragm; and the second laser beam is transmitted after passing through the second beam splitter to serve as Raman pump light and focuses on the sample after passing through a twelfth reflector, a thirteenth reflector, a fourteenth reflector, the spectral filtering module,the second optical delay line, a fifteenth reflector, a sixteenth reflector, the seventh reflector and the concave mirror sequentially.

Description

technical field [0001] The invention relates to the technical field of spectrometers, in particular to a total reflection femtosecond stimulated Raman spectrometer. Background technique [0002] Femtosecond Stimulated Raman Spectroscopy (FSRS) instrument is an important scientific instrument widely used in the fields of physics, chemistry, biology, materials and medicine. The specific research directions involved include chemical reaction kinetics, excited state relaxation, lattice relaxation kinetics, charge transfer and carrier recombination, etc. Femtosecond stimulated Raman spectroscopy is very similar to conventional transient absorption spectroscopy in the experimental optical path, but with the advantages of time-resolved vibrational spectroscopy. Stimulated Raman spectroscopy can not only obtain relevant information collected by traditional transient absorption spectrometers, but also provide additional dynamics of material microscopic lattice and molecular structur...

Claims

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Application Information

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IPC IPC(8): G01N21/65
CPCG01N21/65G01N2021/655
Inventor 马琳聂兆刚郭德强赵欣王程周籽林
Owner GUANGDONG UNIV OF TECH
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