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

Momentum And Radiation Pressure01:20

Momentum And Radiation Pressure

2.4K
An object absorbing an electromagnetic wave would experience a force in the direction of propagation of the wave. This force occurs because electromagnetic waves contain and transport momentum. The force accounts for the wave's radiation pressure exerted on the object. Maxwell's prediction was confirmed in 1903 by Nichols and Hull by precisely measuring radiation pressures with a torsion balance. The measuring instrument had mirrors suspended from a fiber kept inside a glass container.
2.4K
Conservation of Linear Momentum for a System of Particles01:28

Conservation of Linear Momentum for a System of Particles

483
In the dynamic realm of billiards, a fascinating interplay of forces governs the motion of cue balls and stationary balls. When the cue ball collides with a stationary ball, linear momentum is exchanged. The cue ball imparts a fraction of its linear momentum to the stationary ball, causing the cue ball to decelerate while initiating the motion of the stationary ball.
The impulsive force at play during this interaction is of extremely short duration, rendering its impulse negligible. When...
483
Principle of Linear Impulse and Momentum for a Single Particle01:20

Principle of Linear Impulse and Momentum for a Single Particle

1.4K
Linear momentum is a fundamental concept in physics that describes the motion of an object. It is a vector quantity, having a magnitude equal to the product of its mass and its velocity, and direction along the object's velocity. On the other hand, linear impulse, also known as momentum impulse, is a concept in physics related to the change in the linear momentum of an object. Impulse is a vector quantity defined as the product of force and the time over which the force is applied.
Delving...
1.4K
The de Broglie Wavelength02:32

The de Broglie Wavelength

32.7K
In the macroscopic world, objects that are large enough to be seen by the naked eye follow the rules of classical physics. A billiard ball moving on a table will behave like a particle; it will continue traveling in a straight line unless it collides with another ball, or it is acted on by some other force, such as friction. The ball has a well-defined position and velocity or well-defined momentum, p = mv, which is defined by mass m and velocity v at any given moment. This is the typical...
32.7K
Angular Momentum: Single Particle01:10

Angular Momentum: Single Particle

7.4K
Angular momentum is directed perpendicular to the plane of the rotation, and its magnitude depends on the choice of the origin. The perpendicular vector joining the linear momentum vector of an object to the origin is called the “lever arm.” If the lever arm and linear momentum are collinear, then the magnitude of the angular momentum is zero. Therefore, in this case, the object rotates about the origin such that it lies on the rim of the circumference defined by the lever arm...
7.4K
Application of the Linear Momentum Equation01:15

Application of the Linear Momentum Equation

359
The application of the linear momentum equation can be used to analyze the forces needed to hold a 180-degree pipe bend in place with flowing water. In this case, water flows through the bend with a constant cross-sectional area of 0.01 square meters and a flow velocity of 15 meters per second. The pressure at the entrance is 0.2 Megapascals and the pressure at the exit is 0.16 Megapascals.
The goal is to determine the force components in the x and y directions to hold the pipe in place. Since...
359

You might also read

Related Articles

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

Sort by
Same author

Spatiotemporal information fusion for photon-level dynamic imaging.

Scientific reports·2026
Same author

RAPT: Retrieval-Augmented Visual Prompting with Text-Guidance for Pathological Image Classification.

IEEE journal of biomedical and health informatics·2026
Same author

Longitudinal Spinal Cord Atrophy in Patients With Neuromyelitis Optica Spectrum Disorder and Its Association With Rituximab Treatment.

Neurology·2026
Same author

Pyridoimidazolyl Sulfonamide Compound <b>2</b>: A Superior Dual-Acting Drug Candidate with Potent URAT1 Inhibition and Anti-Inflammatory Activity for Gout Management.

Journal of medicinal chemistry·2026
Same author

Urate transporters: Structural mechanisms and therapeutic opportunities in drug development.

Acta pharmaceutica Sinica. B·2026
Same author

Corrigendum to "Adaptive finite time fractional-order sliding mode based robust tracking control of quadrotor UAVs in the presence of stochastic disturbances and parametric uncertainties" [ISA Trans 172 (2026) 306-319].

ISA transactions·2026

Related Experiment Video

Updated: Dec 30, 2025

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

10.1K

A ring-shaped random laser in momentum space.

Yaoxing Bian1, Xiaoyu Shi, Mengnan Hu

  • 1Department of Physics, Applied Optics Beijing Area Major Laboratory, Beijing Normal University, Beijing, China100875. zhnwang@bnu.edu.cn.

Nanoscale
|January 23, 2020
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel ring-shaped random laser by coupling optical fibers. This innovation offers low-noise, high-quality imaging and flexible color-switching capabilities for diverse applications.

More Related Videos

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

11.8K
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

10.3K

Related Experiment Videos

Last Updated: Dec 30, 2025

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

10.1K
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

11.8K
Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

10.3K

Area of Science:

  • Photonics and Laser Technology
  • Materials Science
  • Optical Engineering

Background:

  • Random lasers offer unique emission properties but often lack directional control and suffer from speckle noise.
  • Integrating random lasers with optical fibers presents a challenge for practical applications.
  • Developing cost-effective and versatile light sources for imaging and sensing is an ongoing need.

Purpose of the Study:

  • To design and demonstrate a ring-shaped random laser in momentum space by directly coupling a random laser with optical fiber.
  • To achieve low threshold values, good emission directionality, and reduced speckle noise in the random laser.
  • To explore the potential for color-switchable random lasers for advanced illumination and imaging.

Main Methods:

  • Directly coupling a custom-coated random gain layer on a commercial optical fiber.
  • Utilizing the guiding properties of optical fibers to control laser emission.
  • Modifying the pump position to achieve different emission colors.

Main Results:

  • A ring-shaped random laser in momentum space was successfully designed and fabricated.
  • Achieved low threshold values for red and yellow random laser emissions with good directionality.
  • Demonstrated a triple-state color-switchable random laser (yellow, red, and dual-color) by adjusting the pump position.
  • The developed random laser exhibited extremely low speckle noise, suitable for high-quality imaging.

Conclusions:

  • The fiber-coupled random laser provides an excellent illuminating source with superior imaging quality and minimal speckle noise.
  • The flexible color-switching capability enhances its versatility for various applications.
  • This work paves the way for practical applications of random lasers in sensing, in vivo biological imaging, and high-brightness illumination.