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

Influence of insurance type on healthcare utilization among rural people who use drugs.

Drug and alcohol dependence·2025

Same author

Motivation and context of concurrent stimulant and opioid use among persons who use drugs in the rural United States: a multi-site qualitative inquiry.

Harm reduction journal·2024

Same author

[Study on the assignment method of intensity modulated radiotherapy plan for nasopharyngeal carcinoma based on MR images].

Zhonghua zhong liu za zhi [Chinese journal of oncology]·2021

Same author

A qualitative assessment of discharge against medical advice among patients hospitalized for injection-related bacterial infections in West Virginia.

The International journal on drug policy·2021

Same author

Oncogenic activation of JAK3-STAT signaling confers clinical sensitivity to PRN371, a novel selective and potent JAK3 inhibitor, in natural killer/T-cell lymphoma.

Leukemia·2018

Same author

Stochastic sensitivity analysis for timing and amplitude of pressure waves in the arterial system.

International journal for numerical methods in biomedical engineering·2015

Search research articles

Related Experiment Video

Updated: Jun 19, 2026

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

Photorefractive pulse coupling in the frequency domain.

X S Yao, J Feinberg

|October 6, 2009

Summary

Experiments confirm that photorefractive pulse coupling theory is accurate. The phase shift of diffracted pulses shows a quadratic relationship with the delay between input optical pulses.

Area of Science:

Optics and Photonics
Nonlinear Optics

Background:

Photorefractive materials are crucial for nonlinear optical applications.
Understanding pulse coupling dynamics is essential for advanced optical signal processing.

Purpose of the Study:

To experimentally verify the theoretical predictions of photorefractive pulse coupling.
To investigate the phase dynamics of diffracted pulses in the frequency domain.

Main Methods:

Utilized a setup to induce and analyze photorefractive pulse coupling.
Performed frequency-domain analysis of the diffracted optical pulses.
Varied the relative delay between input optical pulses to observe phase changes.

Main Results:

Confirmed the theoretical model of photorefractive pulse coupling.

More Related Videos

Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy

Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy

Published on: August 29, 2025

Related Experiment Videos

Last Updated: Jun 19, 2026

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

Published on: December 15, 2021

Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy

Simultaneous Label-Free Autofluorescence Multi-Harmonic Microscopy

Published on: August 29, 2025

Demonstrated that the phase added to the diffracted pulse is quadratically dependent on the relative delay.

Validated the frequency-domain behavior of coupled optical pulses.

Conclusions:

The experimental results strongly support the theory of photorefractive pulse coupling.
The quadratic dependence of phase shift on pulse delay is a key characteristic of this phenomenon.
This work contributes to the fundamental understanding of nonlinear light-matter interactions in photorefractive media.