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

¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

2.9K
The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene...
2.9K
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
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

You might also read

Related Articles

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

Sort by
Same author

ORFV-induced glycolysis facilitates virus replication by increasing lactate production to promote the association between HK2 and STING.

Veterinary microbiology·2026
Same author

Vector bend sensor based on an integrated optical fiber coupler with Bragg gratings.

Optics express·2026
Same author

Dual Sites of Fe─N<sub>4</sub>/Co─N<sub>4</sub> Single Atoms and the Third Site of Pillaring FeCo Nanoparticles Synergistically Enable Exceptionally Bifunctional Activity for Oxygen Electrocatalysis.

Small (Weinheim an der Bergstrasse, Germany)·2026
Same author

Lactate-Induced Liquid-Liquid Phase Separation of HIF-1α Drives Myeloid Cell Polarization and Immune Evasion in Colorectal Cancer.

Cell proliferation·2026
Same author

Early is better, but not enough: reconsidering intra-articular ADMSC therapy in osteoarthritis.

International immunopharmacology·2026
Same author

Targeting phase separation: a new strategy to disrupt the stromal-immune axis in colorectal cancer.

Cell communication and signaling : CCS·2026
Same journal

Gaussian-modulated continuous-variable quantum key distribution over 60 km fiber using an integrated silicon photonic receiver.

Optics letters·2026
Same journal

E2E-OCT: end-to-end joint learning model using optical coherence tomography images for vocal cord leukoplakia diagnosis.

Optics letters·2026
Same journal

Holographic generation of panoramic 3D scenes by concave ellipsoidal mirror reflection.

Optics letters·2026
Same journal

Dual-pilot phase recovery with pair-wise maximum-ratio combining for coherent PONs.

Optics letters·2026
Same journal

Mapping the whispering gallery modes of a CaF<sub>2</sub> disk resonator with half-tapered fibers to estimate the fundamental mode volume.

Optics letters·2026
Same journal

Quantitative estimation of deep-subwavelength scale via dark-field scattering axial energy concentration decay profiles.

Optics letters·2026
See all related articles

Related Experiment Video

Updated: Apr 16, 2026

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
12:18

Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

Published on: August 5, 2013

17.7K

Coupling-length phase matching for efficient third-harmonic generation based on parallel-coupled waveguides.

Tianye Huang, Perry Ping Shum, Xuguang Shao

    Optics Letters
    |March 14, 2015
    PubMed
    Summary
    This summary is machine-generated.

    We demonstrate efficient third-harmonic generation (THG) using coupling-length phase matching (CLPM) in parallel-coupled waveguides. This method bypasses the need for perfect phase matching in single waveguides, offering a novel design for nonlinear frequency conversion.

    More Related Videos

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
    12:14

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

    Published on: August 12, 2013

    22.7K
    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

    9.1K

    Related Experiment Videos

    Last Updated: Apr 16, 2026

    Microwave Photonics Systems Based on Whispering-gallery-mode Resonators
    12:18

    Microwave Photonics Systems Based on Whispering-gallery-mode Resonators

    Published on: August 5, 2013

    17.7K
    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
    12:14

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

    Published on: August 12, 2013

    22.7K
    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

    9.1K

    Area of Science:

    • Nonlinear optics
    • Waveguide optics
    • Photonics

    Background:

    • Third-harmonic generation (THG) is crucial for frequency conversion.
    • Traditional THG requires precise phase matching, often difficult to achieve in waveguides.
    • Coupled-waveguide structures offer alternative phase-matching mechanisms.

    Purpose of the Study:

    • To investigate third-harmonic generation (THG) in parallel-coupled waveguides.
    • To explore coupling-length phase matching (CLPM) as a quasi-phase-matching technique for THG.
    • To assess the feasibility and efficiency of CLPM in practical waveguide designs.

    Main Methods:

    • Theoretical analysis of THG in parallel-coupled waveguides.
    • Investigation of spatial modulation of mode intensity for CLPM.
    • Numerical simulations to evaluate CLPM conditions and nonlinear phase modulations.

    Main Results:

    • Two practical sets of coupling-length phase matching (CLPM) conditions were identified for THG in traditional waveguides.
    • Nonlinear phase modulations were found to degrade CLPM-based THG efficiency.
    • Up to 45% conversion efficiency was achieved despite nonlinear effects.

    Conclusions:

    • Coupling-length phase matching (CLPM) provides an effective quasi-phase-matching strategy for third-harmonic generation (THG).
    • This approach relaxes the stringent phase-matching requirements of single waveguides.
    • It presents a significant alternative waveguide design strategy for efficient nonlinear frequency conversion.