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Raman Spectroscopy Instrumentation: Overview

Raman Spectroscopy Instrumentation: Overview

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...

Raman Spectroscopy: Overview

Raman Spectroscopy: Overview

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...

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Related Experiment Video

Updated: Jun 24, 2025

Resolving Water, Proteins, and Lipids from In Vivo Confocal Raman Spectra of Stratum Corneum through a Chemometric Approach

Resolving Water, Proteins, and Lipids from In Vivo Confocal Raman Spectra of Stratum Corneum through a Chemometric Approach

Published on: September 26, 2019

Depth-resolved water temperature measurements using Raman LiDAR.

D J Spence, O Kitzler, C J Taylor

|June 10, 2024

Summary

This summary is machine-generated.

Researchers retrieved depth-resolved temperature profiles in water using Raman LiDAR (Light Detection and Ranging). This method achieved high accuracy for non-homogeneous temperature measurements in a laboratory setting.

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Last Updated: Jun 24, 2025

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Area of Science:

Environmental Science
Optical Sensing Technologies
Fluid Dynamics

Background:

Accurate temperature profiling is crucial for understanding water body dynamics and thermal processes.
Traditional methods for temperature measurement can be invasive or lack spatial resolution.

Purpose of the Study:

To demonstrate the capability of Raman LiDAR for non-invasive, depth-resolved temperature measurements in water.
To evaluate the accuracy and spatial resolution of this technique for characterizing temperature profiles.

Main Methods:

Utilized a Raman LiDAR system for remote sensing of water temperature.
Conducted experiments in a 5-meter laboratory water pipe to simulate controlled conditions.
Collected backscattered Raman signals to infer temperature at various depths.

Main Results:

Successfully retrieved non-homogeneous temperature profiles in the laboratory water pipe.
Achieved a temperature accuracy ranging from 0.35°C to 0.85°C.
Demonstrated a spatial position resolution of 28 cm for the temperature measurements.

Conclusions:

Raman LiDAR is a viable technique for accurate, depth-resolved temperature measurements in water.
The system shows potential for environmental monitoring and industrial applications requiring thermal profiling.
Further development could enhance resolution and extend applicability to diverse aquatic environments.