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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

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:
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...
Double Resonance Techniques: Overview01:12

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...
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

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.
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Sound Waves: Resonance01:14

Sound Waves: Resonance

Resonance is produced depending on the boundary conditions imposed on a wave. Resonance can be produced in a string under tension with symmetrical boundary conditions (i.e., has a node at each end). A node is defined as a fixed point where the string does not move. The symmetrical boundary conditions result in some frequencies resonating and producing standing waves, while other frequencies interfere destructively. Sound waves can resonate in a hollow tube, and the frequencies of the sound...
Oscillations In An LC Circuit01:30

Oscillations In An LC Circuit

An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by

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Updated: Jun 22, 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

Output coupling methods for cavity-based high-harmonic generation.

Kevin D Moll, R Jason Jones, Jun Ye

    Optics Express
    |June 17, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We improved high-harmonic generation by using phase plates in a ring cavity with an aperture. This enhances coupling efficiency and reduces cavity loss for better output.

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    Generation and Coherent Control of Pulsed Quantum Frequency Combs
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    Published on: June 8, 2018

    Area of Science:

    • Laser Physics
    • Nonlinear Optics
    • Quantum Optics

    Background:

    • Ring cavities are crucial for nonlinear optical processes like high-harmonic generation (HHG).
    • Efficient coupling of HHG light out of the cavity is essential for practical applications.
    • Optimizing cavity parameters is key to maximizing HHG efficiency and minimizing losses.

    Purpose of the Study:

    • To investigate coupling efficiency and cavity loss in a ring cavity with an aperture for HHG.
    • To explore the impact of different cavity geometries and input modes on HHG performance.
    • To determine the optimal configuration for efficient intracavity HHG output coupling.

    Main Methods:

    • Utilized a ring cavity with a precisely placed aperture in a focusing mirror.
    • Studied various cavity geometries and input laser modes.
    • Integrated phase plates onto the focusing mirrors to manipulate the intracavity beam.

    Main Results:

    • The aperture successfully enabled intracavity HHG coupling.
    • Different cavity configurations showed varying degrees of coupling efficiency and loss.
    • Integration of phase plates significantly improved input coupling efficiency and reduced cavity loss.

    Conclusions:

    • Phase plates on focusing mirrors are critical for optimizing intracavity HHG.
    • This method enhances both the efficiency of coupling HHG light out of the cavity and minimizes energy loss.
    • The findings pave the way for more efficient HHG sources.