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Related Concept Videos

Double Resonance Techniques: Overview01:12

Double Resonance Techniques: Overview

Double resonance techniques in Nuclear Magnetic Resonance (NMR) spectroscopy involve the simultaneous application of two different frequencies or radiofrequency pulses to manipulate and observe two distinct nuclear spins. One important application of double resonance is spin decoupling, which selectively suppresses coupling with one type of nucleus while observing the NMR signal from another nucleus, simplifying the spectrum and enhancing resolution.
Spin decoupling is usually achieved by...
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...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation01:26

Inductively Coupled Plasma Atomic Emission Spectroscopy: Instrumentation

Inductively coupled plasma (ICP) is the common plasma source used in atomic emission spectroscopy (AES), a technique that detects and analyzes various elements in a sample. This method is often called inductively coupled plasma atomic emission spectroscopy (ICP-AES).
There are three main types of inductively coupled plasma atomic emission spectroscopy  (ICP-AES) instruments: sequential, simultaneous multichannel, and Fourier transform instruments, with the latter being less commonly used.
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...
Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle01:19

Inductively Coupled Plasma Atomic Emission Spectroscopy: Principle

Inductively coupled plasma (ICP) is the most widely used plasma source in atomic emission spectroscopy (AES), also known as Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES). The ICP source, or torch, consists of three concentric quartz tubes with argon gas flowing through them. A spark from a Tesla coil initiates the ionization of argon, generating a high-temperature plasma.
The ions and electrons produced interact with the fluctuating magnetic field created by a water-cooled...
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.

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Related Experiment Video

Updated: Jun 10, 2026

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

Cavity-enhanced direct frequency comb spectroscopy: technology and applications.

Florian Adler1, Michael J Thorpe, Kevin C Cossel

  • 1JILA, National Institute of Standards and Technology, Department of Physics, University of Colorado, Boulder, 80309-0440, USA. fadler@jila.colorado.edu

Annual Review of Analytical Chemistry (Palo Alto, Calif.)
|July 20, 2010
PubMed
Summary

Cavity-enhanced direct frequency comb spectroscopy offers ultrahigh sensitivity for optical loss measurements. This powerful technique enables rapid, parallel analysis across broad spectral windows for diverse applications.

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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
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Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

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Last Updated: Jun 10, 2026

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

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection
12:57

Resonance Fluorescence of an InGaAs Quantum Dot in a Planar Cavity Using Orthogonal Excitation and Detection

Published on: October 13, 2017

Area of Science:

  • Atomic, Molecular, and Optical Physics
  • Spectroscopy
  • Chemical Physics

Background:

  • Optical frequency combs provide a broad bandwidth with discrete, equally spaced frequency lines.
  • High-finesse optical cavities enhance light-matter interaction, increasing sensitivity to optical losses.
  • Combining these technologies creates a powerful spectroscopic platform.

Purpose of the Study:

  • To review the principles, technology, and applications of cavity-enhanced direct frequency comb spectroscopy.
  • To highlight the potential of this method for high-sensitivity measurements.
  • To discuss advancements in comb sources, cavity coupling, and detection schemes.

Main Methods:

  • Utilizing an optical frequency comb coupled to a high-finesse cavity.
  • Leveraging the cavity to enhance the effective light-matter interaction length.
  • Employing individual comb components as parallel detection channels across a wide spectrum.

Main Results:

  • Demonstrated ultrahigh detection sensitivity for optical loss measurements.
  • Achieved rapid, parallel data acquisition over a broad spectral range.
  • Showcased applications in breath analysis, trace gas detection, and cold molecule characterization.

Conclusions:

  • Cavity-enhanced direct frequency comb spectroscopy is a versatile and highly sensitive technique.
  • The platform offers significant potential for medical diagnostics, industrial monitoring, and fundamental research.
  • Further development promises even broader applicability and enhanced performance.