High-frequency double-color coherent anti-Stokes Raman spectrum temperature measuring device and method

A temperature measuring device and high-frequency technology, applied in measuring devices, thermometers, measuring heat, etc., can solve problems such as low efficiency, strong non-resonant background interference, complex system structure, etc., to improve time resolution and spatial resolution, The effect of suppression of non-resonant background interference, efficient and rapid temperature measurement and two-dimensional imaging

Active Publication Date: 2020-12-18
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

This hybrid femtosecond/picosecond coherent anti-Stokes Raman spectroscopy method uses a high repetition rate laser to generate laser light, and the temporal resolution and spatial resolution have also been improved, but at least two lasers must be used simultaneously to

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  • High-frequency double-color coherent anti-Stokes Raman spectrum temperature measuring device and method
  • High-frequency double-color coherent anti-Stokes Raman spectrum temperature measuring device and method
  • High-frequency double-color coherent anti-Stokes Raman spectrum temperature measuring device and method

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[0042]Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so as to understand the purpose, features and advantages of the present invention more clearly. It should be understood that the embodiments shown in the drawings do not limit the scope of the present invention, but merely illustrate the essential spirit of the technical solutions of the present invention.

[0043]figure 1 It is a schematic diagram of a high-frequency two-color coherent anti-Stokes Raman spectroscopy temperature measurement experimental device, including a high-frequency laser 1, a seed laser module 2, an optical parametric oscillator 3, a coherent anti-Stokes Raman signal generating module 4. The imaging spectrometer 5 has five modules. Among them, the high-frequency laser 1 is used to generate 1064nm laser with a repetition frequency of 100kHz and to output 355nm laser and 532nm laser after the 1064nm laser is tripled and doubled...

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Abstract

The invention relates to a high-frequency double-color coherent anti-Stokes Raman spectrum temperature measurement device and method, and the device comprises a high-frequency laser which is used forgenerating 1064nm laser with the repetition frequency of 100kHz and outputting 355nm laser and 532nm laser after the 1064nm laser is subjected to triple frequency and double frequency, wherein the 532nm laser serves as pump light/probe light; a seed laser module which is used for generating two seed lasers near 855nm; an optical parametric oscillator which is used for converting the 355nm laser input by the high-frequency laser and the 855nm laser input by the seed laser to generate 607nm laser as Stokes light; a coherent anti-Stokes Raman signal generation module which is used for mixing 532nm pump light and Stokes laser near 607nm at a detection gas molecule through a lens to generate a coherent anti-Stokes Raman signal; and an imaging spectrometer which is used for imaging the input coherent anti-Stokes Raman signal and calculating the spectral data of the image to obtain the temperature of the detection gas.

Description

Technical field[0001]The invention belongs to the field of photoelectric temperature measurement, and particularly relates to a high-frequency two-color coherent anti-Stokes Raman spectroscopy temperature measurement device and method.Background technique[0002]Combustion diagnosis refers to the experimental measurement of the combustion process and the analysis of the results to obtain relevant information about the fuel, combustion products, and combustion flow field. The diagnosis of combustion flow field involves a wide range of knowledge, such as physical optics, physical chemistry, statistical thermodynamics, laser spectroscopy, instrument analysis, and data processing. The measured objects include the velocity, temperature, density of the flow field, etc. Parameters, and the flow field itself has the characteristics of high temperature flame radiation and gas condensation two-phase complex flow, which puts forward high requirements on diagnostic measurement technology. For a l...

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Application Information

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IPC IPC(8): G01K11/00
CPCG01K11/00
Inventor 刘训臣曹健张昊原王震齐飞
Owner SHANGHAI JIAO TONG UNIV
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