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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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Related Experiment Video

Updated: Aug 6, 2025

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Low-cost Custom Fabrication and Mode-locked Operation of an All-normal-dispersion Femtosecond Fiber Laser for Multiphoton Microscopy

Published on: November 22, 2019

Ultrafast Spectral Tuning of a Fiber Laser for Time-Encoded Multiplex Coherent Raman Scattering Microscopy.

Thomas Gottschall¹, Tobias Meyer-Zedler^2,3, Matthias Eibl⁴

¹Friedrich-Schiller-Universität Jena, Institute of Applied Physics and Abbe Center of Photonics, Albert-Einstein-Str. 6, 07745 Jena, Germany.

The Journal of Physical Chemistry. B

|March 14, 2023

Summary

This summary is machine-generated.

This study introduces a new, fast, electronically controlled laser for coherent Raman scattering microscopy. This advancement enables real-time tracking of multiple molecular tags in biological samples, improving drug uptake studies.

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Area of Science:

Biomedical Optics
Molecular Imaging
Laser Physics

Background:

Coherent Raman scattering (CRS) microscopy with bioorthogonal tagging (e.g., isotope, alkyne labeling) enables targeted monitoring of small molecules in biological systems.
Real-time monitoring of multiple Raman tags is crucial for applications like drug uptake dynamics but requires extremely fast tunable lasers.
Current laser technologies often involve moving parts, limiting speed and stability for multi-resonance imaging.

Purpose of the Study:

To present a novel, electronically controlled laser concept for rapid, multi-resonance coherent anti-Stokes Raman scattering (CARS) imaging.
To overcome the limitations of existing tunable lasers for real-time bioimaging applications.
To facilitate the study of dynamic biological processes at the molecular level.

Main Methods:

Development of a laser system without moving parts, offering full electronic control.
Utilizing a low-noise, spectrally narrow Fourier domain mode-locked laser as a seed source.
Employing a compact, four-wave mixing-based, high-power fiber optical parametric amplifier.

Main Results:

Demonstration of a laser concept enabling quasi-simultaneous acquisition of CARS images at multiple Raman resonances.
The proposed laser design achieves high speed and electronic tunability without mechanical components.
The system is suitable for seeding high-power fiber optical parametric amplifiers for advanced microscopy.

Conclusions:

The presented electronically controlled laser concept is a significant advancement for fast, multi-resonance CRS microscopy.
This technology has the potential to revolutionize real-time molecular imaging in complex biological matrices.
Future applications include enhanced drug uptake studies and dynamic monitoring of cellular processes.