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

Double Resonance Techniques: Overview

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...

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

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.

You might also read

Related Articles

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

Sort by

Same author

Black Hole Spectroscopy and Tests of General Relativity with GW250114.

Physical review letters·2026

Same author

GW250114: Testing Hawking's Area Law and the Kerr Nature of Black Holes.

Physical review letters·2025

Same author

General framework for ultrafast nonlinear photonics: unifying single and multi-envelope treatments [Invited].

Optics express·2024

Same author

Hydrogen-Induced Ultralow Optical Absorption and Mechanical Loss in Amorphous Silicon for Gravitational-Wave Detectors.

Physical review letters·2024

Same author

Ultra-broadband mid-infrared generation in dispersion-engineered thin-film lithium niobate.

Optics express·2022

Same author

Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO's and Advanced Virgo's Third Observing Run.

Physical review letters·2022

Search research articles

Related Experiment Video

Updated: Jul 10, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Tunable-chirp pulse compression in quasi-phase-matched second-harmonic generation.

A M Schober, G Imeshev, M M Fejer

|November 21, 2007

Summary

We developed a tunable method to compensate linear chirp in laser pulses using a special lithium niobate grating. This technique produces high-quality second-harmonic output, improving laser performance.

More Related Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Related Experiment Videos

Last Updated: Jul 10, 2026

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Area of Science:

Nonlinear Optics
Laser Physics
Materials Science

Background:

Chirped laser pulses can degrade performance in nonlinear optical processes.
Accurate pulse shaping is crucial for applications requiring high temporal resolution.

Purpose of the Study:

To demonstrate a tunable method for compensating linear chirp in first-harmonic pump pulses.
To achieve a near-transform-limited second-harmonic output pulse.

Main Methods:

Utilized a chirped, fanned, periodically poled lithium niobate (PPLN) quasi-phase-matching (QPM) grating.
Employed device orientation reversal to compensate for both positive and negative chirps.

Main Results:

Successfully demonstrated continuously tunable compensation of linear chirp.
Produced a near-transform-limited second-harmonic output pulse.
Showcased the ability to compensate both positive and negative chirps.

Conclusions:

The developed PPLN QPM device offers a simple, monolithic solution for chirp compensation.
The technique is adaptable for compensating higher-order phase distortions with minor modifications.