Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

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...
¹³C NMR: ¹H–¹³C Decoupling01:04

¹³C NMR: ¹H–¹³C Decoupling

The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
Standing Waves in a Cavity01:28

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:
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...

You might also read

Related Articles

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

Sort by
Same author

[Electroencephalographic predictors of olfactory stimulus discrimination in COVID-19 survivors].

Zhurnal nevrologii i psikhiatrii imeni S.S. Korsakova·2026
Same author

Spatial distribution of plasma parameters in a hollow cathode discharge not limited by walls: Experiment and modeling.

Physical review. E·2025
Same author

Influence of the ionization process on characteristics of spatial relaxation of the average electron energy in inert gases in a uniform electric field.

Physical review. E·2022
Same author

Diode Laser Spectrometer for Diagnostic Assessment of Exhaled Air Components.

Sovremennye tekhnologii v meditsine·2021
Same author

High-resolution and high-sensitivity absorption spectroscopy in external optical resonators with fast frequency tuning.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy·2020
Same author

Highly efficient optical director reorientation of liquid-crystalline polymer induced by dye additives.

Physical review. E·2017

Related Experiment Video

Updated: Jul 17, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Diode ring-down spectroscopy without intensity modulation in an off-axis multipass cavity.

I V Nikolaev1, V N Ochkin, M V Spiridonov

  • 1P.N. Lebedev Physical Institute, Russian Academy of Sciences, Leninsky Prospect, 53, 119991 Moscow, Russia.

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
|February 3, 2007
PubMed
Summary

This study introduces a new cavity ring-down spectroscopy (CRDS) method using an off-axis multipass cell for atmospheric nitrogen dioxide (NO2) detection. It achieves high spectral resolution and faster measurements, improving signal extraction in noisy environments.

More Related Videos

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
09:46

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Published on: August 8, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

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

Published on: May 30, 2014

Related Experiment Videos

Last Updated: Jul 17, 2026

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
09:10

Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

Published on: April 24, 2014

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators
09:46

Fabrication and Characterization of High-Q Silicon Nitride Membrane Resonators

Published on: August 8, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

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

Published on: May 30, 2014

Area of Science:

  • Spectroscopy
  • Atmospheric Chemistry
  • Laser Physics

Background:

  • Cavity Ring-Down Spectroscopy (CRDS) is a sensitive technique for measuring trace gases.
  • Conventional CRDS often requires modulation of laser intensity, limiting measurement speed and signal extraction.
  • Accurate atmospheric measurements of pollutants like NO2 are crucial for environmental monitoring.

Purpose of the Study:

  • To develop and validate a novel CRDS technique for atmospheric absorption spectroscopy.
  • To improve spectral resolution and measurement speed compared to traditional CRDS methods.
  • To demonstrate the application of this technique for NO2 detection in ambient air.

Main Methods:

  • Utilizing an off-axis multipass cell with space-separated detectors for CRDS.
  • Eliminating the need for diode laser intensity modulation.
  • Achieving high spectral resolution (approx. 0.0003 cm-1) with rapid, continuous laser tuning (approx. 20 ms per spectrum).

Main Results:

  • The proposed CRDS method recorded full absorption spectra with high resolution.
  • The technique demonstrated a 1000-fold slower required rise time compared to conventional CRDS.
  • Enhanced signal extraction capabilities were observed, even in the presence of significant noise.
  • Successful application to atmospheric NO2 absorption measurements was achieved.

Conclusions:

  • The off-axis multipass CRDS technique offers a robust alternative for atmospheric spectroscopy.
  • This method enhances measurement efficiency and signal processing capabilities.
  • It provides a valuable tool for environmental monitoring and atmospheric chemistry research.