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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...
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
Atomic Emission Spectroscopy: Instrumentation01:22

Atomic Emission Spectroscopy: Instrumentation

The instrumentation of atomic emission spectrometry (AES) involves various components, including atomization devices that convert samples into gas-phase atoms and ions. There are two main types of atomization devices: continuous and discrete atomizers.  Continuous atomizers, like plasmas and flames, introduce samples in a constant stream, while discrete atomizers inject individual samples using syringes or autosamplers. The most common discrete atomizer is the electrothermal atomizer.
Atomic Absorption Spectroscopy: Instrumentation01:22

Atomic Absorption Spectroscopy: Instrumentation

An atomic absorption spectrophotometer (AAS) comprises several components: a radiation source, an atomizer, a monochromator, and a detector. The radiation source can be a hollow-cathode lamp (HCL) or an electrodeless-discharge lamp (EDL), both of which provide a narrow emission line of the required wavelength. However, some instruments use continuum sources and high-resolution monochromators to achieve a narrow range of radiation.
The atomizer used in AAS can be either a flame atomizer or an...
NMR Spectroscopy: Spin–Spin Coupling01:08

NMR Spectroscopy: Spin–Spin Coupling

The spin state of an NMR-active nucleus can have a slight effect on its immediate electronic environment. This effect propagates through the intervening bonds and affects the electronic environments of NMR-active nuclei up to three bonds away; occasionally, even farther. This phenomenon is called spin–spin coupling or J-coupling. Coupling interactions are mutual and result in small changes in the absorption frequencies of both nuclei involved. While nuclei of the same element are involved in...

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Related Experiment Video

Updated: Jun 25, 2026

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering (CARS)
12:56

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering (CARS)

Published on: October 17, 2010

A two-state Raman coupler for coherent atom optics.

J E Debs1, D Döring, N P Robins

  • 1Australian Centre for Quantum Atom Optics, Department of Quantum Science, The Australian National University, Canberra, 0200, Australia.john.debs@anu.edu.au

Optics Express
|February 17, 2009
PubMed
Summary
This summary is machine-generated.

We developed a Raman laser system for precise control of ultracold atoms. This system enables the creation of bright atom lasers and advances atom interferometry for precise measurements.

More Related Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Related Experiment Videos

Last Updated: Jun 25, 2026

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering (CARS)
12:56

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering (CARS)

Published on: October 17, 2010

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Quantum Optics
  • Laser Physics

Background:

  • Atom lasers are coherent matter-wave beams analogous to optical lasers.
  • Controlling the internal states of atoms is crucial for quantum technologies.
  • Raman transitions offer a precise method for manipulating atomic states.

Purpose of the Study:

  • To present a novel Raman laser system for driving two-photon transitions in Rubidium-87.
  • To demonstrate the system's capability as an atom laser outcoupler.
  • To explore its potential for quantum information transfer and atom interferometry.

Main Methods:

  • Utilized a novel optical design to generate two phase-coherent optical beams.
  • Drove a closed two-photon Raman transition between hyperfine ground states of Rubidium-87.
  • Operated the system as an outcoupler to produce an atom laser in a single internal state.

Main Results:

  • Achieved resonant driving of two-photon transitions in Rubidium-87.
  • Produced a high-brightness, low-divergence atom laser using a Raman outcoupler.
  • Demonstrated the system's function as an internal state beamsplitter.

Conclusions:

  • The developed Raman laser system is effective for producing high-quality atom lasers.
  • The system's optical outcoupling facilitates the transfer of photon correlations to atom beams.
  • This work represents a significant step towards free-space Ramsey interferometry with atom lasers.