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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...

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Updated: Jun 29, 2025

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

Published on: May 18, 2011

Optics miniaturization strategy for demanding Raman spectroscopy applications.

Oleksii Ilchenko^1,2, Yurii Pilhun^3,4, Andrii Kutsyk^3,4,5

¹Technical University of Denmark, Department of Health Technology, Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics, Kgs. Lyngby, Denmark. olil@lightnovo.com.

Nature Communications

|April 8, 2024

Summary

Researchers developed a compact Raman spectrometer for portable use. This miniaturized device offers research-grade performance, enabling widespread adoption of Raman spectroscopy in various applications.

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Rejection of Fluorescence Background in Resonance and Spontaneous Raman Microspectroscopy

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Published on: May 18, 2011

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Published on: December 29, 2015

Area of Science:

Analytical Chemistry
Spectroscopy
Instrumentation

Background:

Raman spectroscopy enables non-destructive, label-free chemical analysis at the microscale.
Current Raman systems often require bulky, expensive instrumentation, limiting their accessibility.
Miniaturization is key to broader application of this powerful technique.

Purpose of the Study:

To develop a centimeter-scale, cost-effective Raman spectrometer.
To achieve performance comparable to research-grade systems in a miniaturized form factor.
To demonstrate the versatility of the miniaturized Raman spectrometer across diverse applications.

Main Methods:

Utilized cheap, non-stabilized laser diodes and densely packed optics.
Employed non-cooled small sensors for reduced size and power consumption.
Integrated a built-in reference for accurate wavenumber and intensity calibration.

Main Results:

Achieved centimeter-scale dimensions with performance rivaling bulky research systems.
Demonstrated excellent sensitivity, low power consumption, and 7 cm^-1 resolution.
Successfully applied the device for methanol quantification, in-vivo skin measurements, fermentation monitoring, chemical mapping, SERS mapping, and bacteria identification.

Conclusions:

The miniaturized Raman spectrometer offers high performance and versatility in a compact, low-power design.
This technology democratizes Raman spectroscopy, paving the way for integration into smartphones and medical devices.
Enables widespread, on-site chemical analysis and diagnostics.