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

Interference and Superposition of Waves01:07

Interference and Superposition of Waves

5.8K
When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
5.8K
Interference and Diffraction02:18

Interference and Diffraction

28.7K
Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
28.7K
Interference: Path Lengths01:10

Interference: Path Lengths

2.5K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
2.5K
Sound Waves: Interference00:53

Sound Waves: Interference

4.2K
Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
4.2K
Propagation of Waves01:07

Propagation of Waves

2.5K
When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
2.5K
Standing Waves in a Cavity01:28

Standing Waves in a Cavity

1.7K
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:
1.7K

You might also read

Related Articles

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

Sort by
Same author

Immunothrombotic Cell-Cell Communication Networks in Coronary Atherosclerosis: Critical Insights from Single-Cell and Spatial Systems Biology.

International journal of molecular sciences·2026
Same author

Implant Apicoectomy as a Minimally Invasive Alternative to Explantation in Retrograde Peri-Implantitis: A Case Report with a 12-Month Clinical and Radiological Follow-Up.

Dentistry journal·2026
Same author

Essential and Toxic Elements in Cardiovascular Disease: Pathophysiological Roles and the Emerging Contribution of Hair Mineral Analysis.

International journal of molecular sciences·2025
Same author

Chlorogenic Acid's Role in Metabolic Health: Mechanisms and Therapeutic Potential.

Nutrients·2025
Same author

The Role of Neutrophil Extracellular Networks in Cardiovascular Pathology.

Cells·2025
Same author

Rehabilitation Protocols and Functional Outcomes in Oncological Patients Treated with Modular Megaprosthesis: A Systematic Review.

Cancers·2025

Related Experiment Video

Updated: May 1, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
07:56

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

9.8K

High-visibility nonclassical interference of photon pairs generated in a multimode nonlinear waveguide.

Michał Jachura, Michał Karpiński, Czesław Radzewicz

    Optics Express
    |April 11, 2014
    PubMed
    Summary

    Researchers achieved high-visibility two-photon interference using a novel technique with a periodically poled potassium titanyl phosphate (PPKTP) waveguide. This method ensures spatial indistinguishability of photon pairs for quantum applications.

    More Related Videos

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    7.9K
    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

    13.9K

    Related Experiment Videos

    Last Updated: May 1, 2026

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    07:56

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

    Published on: September 5, 2019

    9.8K
    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    7.9K
    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

    13.9K

    Area of Science:

    • Quantum Optics
    • Photonics
    • Quantum Information Science

    Background:

    • Two-photon interference is a fundamental phenomenon in quantum optics.
    • Spontaneous parametric down-conversion (SPDC) is a key source for generating entangled photon pairs.
    • Spatial indistinguishability of photons is crucial for high-visibility interference.

    Purpose of the Study:

    • To demonstrate two-photon interference using a specific type of SPDC source.
    • To control spatial characteristics of photon pairs for enhanced indistinguishability.
    • To verify the quality of generated photon pairs and interference visibility.

    Main Methods:

    • Utilized a continuous-wave (cw) pumped type-II SPDC source.
    • Employed a multimode periodically poled potassium titanyl phosphate (PPKTP) waveguide.
    • Applied intermodal dispersion to control spatial characteristics and generate photons in fundamental modes.
    • Verified photon overlap using a Hong-Ou-Mandel interferometer and Shih-Alley polarization entanglement setup.

    Main Results:

    • Successfully generated photon pairs in fundamental transverse modes, ensuring spatial indistinguishability.
    • Achieved visibilities consistently above 90% in Hong-Ou-Mandel interference tests.
    • Confirmed high-quality polarization entanglement in the Shih-Alley configuration.

    Conclusions:

    • The demonstrated technique effectively controls spatial modes for indistinguishable photon pairs.
    • The PPKTP waveguide SPDC source provides high-quality entangled photons suitable for quantum interference.
    • The results pave the way for advanced quantum optical experiments and applications.