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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

587
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...
587
Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

759
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...
759

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Related Experiment Video

Updated: Oct 13, 2025

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
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A Remote Raman System and Its Applications for Planetary Material Studies.

Hongkun Qu1, Zongcheng Ling1,2, Xiaobin Qi1

  • 1Shandong Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, School of Space Science and Physics, Institute of Space Sciences, Shandong University, Weihai 264209, China.

Sensors (Basel, Switzerland)
|November 13, 2021
PubMed
Summary
This summary is machine-generated.

A new remote Raman system with adjustable laser energy was developed for planetary exploration. This system successfully identifies minerals and organic compounds on extraterrestrial bodies from a distance.

Keywords:
Raman spectraanhydrous/hydrous mineralsorganicsplanetary explorationremote Raman

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Area of Science:

  • Planetary Science
  • Spectroscopy
  • Laser Technology

Background:

  • Remote sensing is crucial for planetary exploration.
  • Raman spectroscopy provides valuable mineralogical and chemical information.
  • Previous remote Raman systems faced challenges with signal-to-noise ratio (SNR) and sample preservation.

Purpose of the Study:

  • To develop and demonstrate a remote Raman prototype with adjustable excitation energy.
  • To enhance signal-to-noise ratio (SNR) and optimize power consumption.
  • To assess the system's capability for detecting minerals relevant to planetary exploration.

Main Methods:

  • A remote Raman system was constructed, featuring a spectrograph with a cooled CCD detector and a 150 mm telescope.
  • A tunable 1064 nm Nd:YAG laser (0-200 mJ/pulse) and a KTP crystal for second harmonic generation (532 nm) were employed.
  • Variable laser pulse energies and integration times were utilized to acquire remote Raman spectra.

Main Results:

  • Distinguishable remote Raman spectra were obtained for various mineral samples at a distance of 4 m.
  • The system successfully identified silicates, carbonates, sulfates, perchlorates, water/water ice, and organics.
  • Feasible applications for Chinese planetary exploration missions were discussed.

Conclusions:

  • The developed remote Raman system is effective for mineral and organic detection in planetary exploration contexts.
  • Adjustable laser energy improves SNR and prevents sample damage.
  • This technology holds significant promise for future extraterrestrial missions.