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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: Jun 1, 2026

Ultrafast Laser-Ablated Nanoparticles and Nanostructures for Surface-Enhanced Raman Scattering-Based Sensing Applications
06:15

Ultrafast Laser-Ablated Nanoparticles and Nanostructures for Surface-Enhanced Raman Scattering-Based Sensing Applications

Published on: June 16, 2023

Deep ultraviolet diamond Raman laser.

Eduardo Granados1, David J Spence, Richard P Mildren

  • 1MQ Photonics Research Centre, Macquarie University, Sydney, NSW 2109, Australia.

Optics Express
|June 7, 2011
PubMed
Summary
This summary is machine-generated.

We developed a novel diamond Raman laser emitting at 275.7 nm. This laser demonstrates efficient energy conversion and enables precise two-photon etching of diamond surfaces.

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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
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Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Area of Science:

  • Optics and Photonics
  • Laser Physics
  • Materials Science

Background:

  • Diamond Raman lasers are promising for generating short-wavelength light.
  • Efficiently generating deep UV light requires advanced laser technologies.
  • Understanding nonlinear optical processes in diamond is crucial for laser development.

Purpose of the Study:

  • To demonstrate a synchronously pumped diamond Raman laser operating in the deep UV.
  • To investigate the performance characteristics and efficiency of the diamond Raman laser.
  • To explore the potential of two-photon absorption in diamond for surface modification.

Main Methods:

  • Utilizing a mode-locked Nd:YVO4 laser's 4th harmonic as the pump source.
  • Synchronously pumping a diamond crystal to generate Raman lasing at 275.7 nm.
  • Developing a numerical model incorporating two-photon absorption and Raman gain.

Main Results:

  • Achieved a threshold pump pulse energy of 5.8 nJ.
  • Generated output pulses up to 0.96 nJ with a 10.3% conversion efficiency.
  • Observed nanometer-scale two-photon assisted etching of diamond surfaces.

Conclusions:

  • The synchronously pumped diamond Raman laser is a viable source for deep UV generation.
  • The experimental results align well with the developed numerical model.
  • Two-photon absorption in diamond offers a pathway for high-resolution surface structuring.