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相关概念视频

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

296
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
296
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

309
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
309

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相关实验视频

Updated: Jun 6, 2025

Implementation of a Coherent Anti-Stokes Raman Scattering CARS System on a Ti:Sapphire and OPO Laser Based Standard Laser Scanning Microscope
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Published on: July 17, 2016

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基于光学诱导的空气激光的单射单束连贯拉曼散射温度计.

Xu Lu1,2, Yewei Chen1,3, Francesco Mazza4

  • 1State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, 201800, China.

Light, science & applications
|November 24, 2024
PubMed
概括

一种新的单射,单束连贯拉曼散射 (SS-CRS) 温度计方法使用空气激光进行高速温度测量. 这种技术为动态燃烧和等离子体研究提供了高的信号噪声比和可重复性.

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相关实验视频

Last Updated: Jun 6, 2025

Implementation of a Coherent Anti-Stokes Raman Scattering CARS System on a Ti:Sapphire and OPO Laser Based Standard Laser Scanning Microscope
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科学领域:

  • 物理 物理学 物理
  • 光学诊断仪器的使用.
  • 频谱学是一种光谱学.

背景情况:

  • 准确,快速,易于实施的温度计技术对于研究动态燃烧,短暂反应流和非平衡等离子体至关重要.
  • 对于这些苛刻的应用,现有的方法可能面临速度,准确性或复杂性的限制.

研究的目的:

  • 开发一种新的单射,单束连贯拉曼散射 (SS-CRS) 温度计技术.
  • 用空气激光作为探测器来提高信号质量和测量速度.

主要方法:

  • 开发一个单射,单束连贯拉曼散射 (SS-CRS) 系统.
  • 将空气激光集成为探测束,以增强信号噪声比.
  • 在各种温度下验证SS-CRS温度计.

主要成果:

  • 空气激光辅助的SS-CRS表现出高的信号噪声比,使得一次性测量能够以1kHz的重复率进行.
  • SS-CRS温度计的精度低于2.3%,在更高的温度下,不准确度会增加.
  • 空气激光的独特特性促进了高的测量可重复性和快速的采集率.

结论:

  • 开发的SS-CRS温度计,由空气激光驱动,为高速温度测量提供了一种新有效的方法.
  • 这种技术在短暂反应流和等离子体中具有先进诊断的巨大潜力.
  • 易于实施和高性能为快速测温分析开辟了新的途径.