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

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.

¹³C NMR: ¹H–¹³C Decoupling

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...

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...

Bandpass Sampling

Bandpass Sampling

In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2. The spectrum...

Rectangular and Triangular Pulse Function

Rectangular and Triangular Pulse Function

The unit rectangular pulse function is mathematically represented by a rectangular function centered at the origin with a height of one unit. This function is defined by two parameters: T, which specifies the center location of the pulse along the time axis, and τ, which determines the pulse duration.
For example, consider a rectangular pulse with a 5V amplitude, a 3-second duration, and centered at t=2 seconds. This pulse can be expressed using the rectangular function, written as,

Regulation of Pulse

Regulation of Pulse

Pulse regulation involves physiological mechanisms that ensure adequate blood flow throughout the body. The heartbeat, regulated by the autonomic nervous system, is influenced by hormonal balance, physical activity, and emotional state.

You might also read

Related Articles

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

Sort by

Same author

Robust Measurement of the Concurrence of Vector Light Beams.

Physical review letters·2026

Same author

Cross-spectral purity-a fundamental property of light: tutorial.

Journal of the Optical Society of America. A, Optics, image science, and vision·2025

Same author

Order parameters and the irreversible behavior of spatial coherence in the time and frequency domains.

Journal of the Optical Society of America. A, Optics, image science, and vision·2025

Same author

Three-dimensional polarization states generated from random paraxial light.

Optics letters·2025

Same author

Determination of mode strengths in channel waveguide from the complex electric field.

Scientific reports·2024

Same author

Polarimetric measurement of temporal coherence in electromagnetic light beams.

Optics express·2024

Search research articles

Related Experiment Video

Updated: Jun 17, 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

Distinguishing between deterministic and stochastic pulse broadening.

Minna Surakka¹, Ari T Friberg, Jari Turunen

¹University of Joensuu, Department of Physics and Mathematics, P.O. Box 111, FI-80101 Joensuu, Finland. minna.m.surakka@joensuu.fi

|January 19, 2010

Summary

Two mechanisms, deterministic and stochastic, can broaden optical pulses. This study presents methods to differentiate these pulse broadening mechanisms using time-resolved measurements, specifically for Gaussian Schell-model pulses.

More Related Videos

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Published on: July 25, 2022

Related Experiment Videos

Last Updated: Jun 17, 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

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Multiplex Chemical Imaging Based on Broadband Stimulated Raman Scattering Microscopy

Published on: July 25, 2022

Area of Science:

Optics and Photonics
Quantum Optics
Wave Phenomena

Background:

Pulse broadening in optical systems can arise from deterministic or stochastic mechanisms.
Distinguishing between these mechanisms is crucial for understanding and controlling light-matter interactions.

Purpose of the Study:

To develop and present methods for differentiating between deterministic and stochastic pulse broadening mechanisms.
To investigate the applicability of these methods to Gaussian Schell-model pulses.

Main Methods:

Utilizing time-resolved intensity measurements.
Employing Michelson's interferometer to analyze pulse propagation.
Separating the contributions of temporal/spectral phase variations and frequency component correlations.

Main Results:

Demonstrated a method to distinguish between deterministic (variable phase) and stochastic (frequency correlations) pulse broadening.
Successfully separated the roles of these mechanisms for Gaussian Schell-model pulses.
Time-resolved intensity measurements through an interferometer proved effective.

Conclusions:

The proposed methods enable clear differentiation between deterministic and stochastic pulse broadening.
This work provides a pathway for analyzing complex optical fields and their interactions.