Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

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...

IR Absorption Frequency: Hybridization

IR Absorption Frequency: Hybridization

Hydrocarbons such as alkanes, alkenes, and alkynes show characteristic C–H stretching absorption bands. These IR stretching frequencies depend on the hybridization of the involved carbon atom and can be explained in terms of the s character of each hybridized atomic orbital.
Among the sp, sp2, and sp3 hybridized orbitals, sp orbitals have the maximum s character (50%). Consequently, the electrons are held more closely to the nucleus, resulting in stronger and shorter C–H bonds that...

IR Spectroscopy: Molecular Vibration Overview

IR Spectroscopy: Molecular Vibration Overview

When Infrared (IR) radiation passes through a covalently bonded molecule, the bonds transition from lower to higher vibrational levels. The fundamental vibrational motions that result in infrared absorption can be classified as stretching or bending vibrations.
Stretching vibrations are vibrational motions that occur along the bond line, changing the bond length or distance between two bonded atoms. They are further distinguished as symmetric or asymmetric. In symmetric stretching, the...

Standing Waves in a Cavity

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:

Atomic Emission Spectroscopy: Instrumentation

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.

IR Frequency Region: Fingerprint Region

IR Frequency Region: Fingerprint Region

IR spectra are divided into two main regions: the diagnostic region and the fingerprint region. The diagnostic region of the spectrum lies above 1500 cm−1. The absorptions resulting from single-bond vibrations of the N–H, C–H, and O–H stretch at higher wavenumbers and appear on the left side of the spectrum. The stretching absorptions of the C≡C and C≡N occur between 2100–2300 cm−1. In contrast, those arising from stretching absorptions of the...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Probing Cold Supersonic Jets with Optical Frequency Combs.

Molecules (Basel, Switzerland)·2025

Same author

Lineshape of Amplitude-Modulated Stimulated Raman Spectra.

Sensors (Basel, Switzerland)·2024

Same author

Measurement and assignment of J = 5 to 9 rotational energy levels in the 9070-9370 cm-1 range of methane using optical frequency comb double-resonance spectroscopy.

The Journal of chemical physics·2024

Same author

Addendum: Sub-Doppler optical-optical double-resonance spectroscopy using a cavity-enhanced frequency comb probe.

Nature communications·2024

Same author

Sub-Doppler optical-optical double-resonance spectroscopy using a cavity-enhanced frequency comb probe.

Nature communications·2024

Same author

Sub-Doppler Double-Resonance Spectroscopy of Methane Using a Frequency Comb Probe.

Physical review letters·2021

Search research articles

Related Experiment Video

Updated: Sep 25, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Optical frequency comb Fourier transform cavity ring-down spectroscopy.

Romain Dubroeucq, Lucile Rutkowski

|April 27, 2022

Summary

This summary is machine-generated.

We developed a broadband and sensitive cavity ring-down spectroscopy technique. This method precisely measures atmospheric water and carbon dioxide absorption spectra without calibration.

More Related Videos

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Related Experiment Videos

Last Updated: Sep 25, 2025

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Area of Science:

Spectroscopy
Quantum Optics
Atmospheric Science

Background:

Cavity ring-down spectroscopy (CRDS) offers high sensitivity but often requires calibration.
Frequency combs provide precise, broadband light sources for spectroscopy.
Fourier transform spectrometers (FTS) enable rapid spectral acquisition.

Purpose of the Study:

To demonstrate a novel, calibration-free broadband absorption spectroscopy technique.
To combine the advantages of frequency comb spectroscopy and time-resolved FTS with CRDS.
To achieve high spectral resolution and absorption precision for atmospheric gas analysis.

Main Methods:

Utilizing a near-infrared frequency comb coupled with a time-resolved Fourier transform spectrometer.
Simultaneously measuring cavity ring-down decays across multiple spectral elements.
Spectrally sorting the decays to obtain purely exponential ring-down curves for each frequency.

Main Results:

Successfully retrieved absorption spectra of atmospheric water and carbon dioxide.
Demonstrated high frequency resolution and excellent absorption precision.
Validated the calibration-free nature of the technique, independent of cavity parameters.

Conclusions:

The combined frequency comb and time-resolved FTS-CRDS technique offers a powerful new tool for accurate, broadband gas absorption spectroscopy.
This method eliminates the need for traditional calibration, simplifying measurements and enhancing accuracy.
Potential applications include precise atmospheric monitoring and fundamental spectroscopic studies.