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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

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: Overview01:20

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 the...

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Related Experiment Video

Updated: May 13, 2026

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation
09:39

In-situ Tapering of Chalcogenide Fiber for Mid-infrared Supercontinuum Generation

Published on: May 27, 2013

Mid-infrared chalcogenide glass Raman fiber laser.

M Bernier1, V Fortin, N Caron

  • 1Center for Optics, Photonics, and Lasers (COPL), Université Laval, Québec, Canada. martin.bernier@copl.ulaval.ca

Optics Letters
|March 5, 2013
PubMed
Summary

Researchers demonstrate the first mid-infrared Raman fiber laser (RFL) operating above 3 μm. This novel chalcogenide glass RFL achieves 3.34 μm emission, paving the way for new infrared applications.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Mid-infrared (MIR) lasers are crucial for various applications, including spectroscopy, sensing, and free-space communications.
  • Chalcogenide glasses offer unique optical properties for MIR applications, but their integration into laser systems remains challenging.

Purpose of the Study:

  • To demonstrate the first operation of a Raman fiber laser (RFL) emitting in the mid-infrared region (above 3 μm).
  • To investigate the performance of a chalcogenide glass-based RFL for MIR applications.

Main Methods:

  • Fabrication of a single-mode Raman fiber laser using As2S3 (arsenic sulfide) chalcogenide glass.
  • Construction of a low-loss Fabry-Pérot cavity using fiber Bragg gratings.
  • Pumping the RFL using a specially designed quasi-continuous-wave (quasi-cw) erbium-doped fluoride fiber laser operating at 3.005 μm.

Main Results:

  • Successful demonstration of a RFL emitting at a wavelength of 3.34 μm.
  • Achieved a laser output peak power of 0.6 W.
  • Obtained a lasing efficiency of 39% with respect to the launched pump power.

Conclusions:

  • The study presents the first successful mid-infrared RFL operating above 3 μm.
  • The results highlight the potential of chalcogenide glass-based RFLs for MIR applications.
  • This development opens avenues for novel MIR laser sources.