Raman spectroscopic apparatus and method for measuring raman spectrum containing fluorescent materials

A technology of Raman spectroscopy and analytical instruments, which is applied in the field of Raman spectroscopy for measuring fluorescent substances, which can solve the problems of sensitivity to temperature fluctuations and vibrations, submerged Raman optical signals, poor mechanical and temperature stability, etc., so as to optimize the optical system. , the effect of inhibiting fluorescence

Inactive Publication Date: 2011-02-09
必达泰克光电设备(上海)有限公司
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Problems solved by technology

However, these external cavity resonant laser structures are sensitive to alignment accuracy of optical components (such as lens and grating orientation), temperature fluctuations, and vibrations, resulting in poor mechanical and temperature stability.
[0004] On the other hand, some composite materials will emit strong fluorescence under the action of laser, and the fluorescence will drown out the weak Raman light signal

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  • Raman spectroscopic apparatus and method for measuring raman spectrum containing fluorescent materials
  • Raman spectroscopic apparatus and method for measuring raman spectrum containing fluorescent materials

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Embodiment Construction

[0034] Before describing the embodiments of the present invention in detail, it should be pointed out that these embodiments mainly relate to the method steps and device elements related to the Raman spectroscopic analysis instrument using a self-collimated non-dispersive external cavity laser as an excitation light source. Correspondingly, only details related to these device elements and method steps are shown in the figure to better understand the embodiments of the present invention, and details that are obvious to those with a little experience are not described here.

[0035] Terms used in this document to describe relative relationships, such as first and second, top and bottom, and similar terms may be used only to distinguish one entity or step from another and do not necessarily require or imply that such entities or steps There is a certain connection or sequence between them. The terms "comprising", "comprising" or other variations are intended to cover a non-exclu...

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Abstract

A Raman spectroscopic apparatus utilizing a self-aligned non-dispersive external cavity laser as the excitation light source. The output spectrum of the laser is narrowed and stabilized by a volume Bragg grating to provide high spectral brightness. A high throughput optical system is used for Raman scattering signal excitation and extraction, which takes full advantage of the high spectral brightness of the laser source. The invention also discloses a method for measuring Raman spectrum containing fluorescent materials.

Description

technical field [0001] The invention relates to a Raman spectrum analysis instrument. The invention also relates to a method for measuring the Raman spectrum of the fluorescent substance. Background technique [0002] Raman spectroscopy has demonstrated powerful capabilities in non-destructive physical property analysis and identification. However, due to the lack of low-cost, robust, reliable and stable semiconductor lasers that can provide high spectral line brightness, the application of Raman spectrometers has been hindered to some extent. Here the spectral line brightness is defined as: laser power divided by its spectral line width. A wide stripe or wide area semiconductor laser (eg typical stripe width at 20 = 500 microns) can provide high output power > 1 Watt. However, because there are a large number of excitation modes in the Fabry-Perot (F-P) laser resonator, its spectral line width is on the order of several nanometers or wider. This broad linewidth limit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J3/44
CPCG01J3/44G01N2021/6419G01N21/65G01J3/10
Inventor 周新王晓路
Owner 必达泰克光电设备(上海)有限公司
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