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Related Concept Videos

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...
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:
Carrier Generation and Recombination01:22

Carrier Generation and Recombination

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Second-Order Circuits01:17

Second-Order Circuits

Integrating two fundamental energy storage elements in electrical circuits results in second-order circuits, encompassing RLC circuits and circuits with dual capacitors or inductors (RC and RL circuits). Second-order circuits are identified by second-order differential equations that link input and output signals.
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Updated: Jun 19, 2026

Stimulated Stokes and Antistokes Raman Scattering in Microspherical Whispering Gallery Mode Resonators
12:21

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Published on: April 4, 2016

Resonant cascaded surface-emitting second-harmonic generation: a strong third-order nonlinear process.

J B Khurgin, Y J Ding

    Optics Letters
    |October 22, 2009
    PubMed
    Summary

    A new method uses cascaded nonlinearity and surface-emitting second-harmonic generation for efficient optical limiting and phase conjugation. This practical scheme works effectively at low pump powers below 100 milliwatts.

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    Area of Science:

    • Nonlinear optics
    • Quantum optics
    • Materials science

    Background:

    • Cascaded nonlinearities are crucial for advanced optical applications.
    • Surface-emitting second-harmonic generation (SE-SHG) offers compact light conversion.
    • Fabry-Perot cavities enhance light-matter interactions.

    Purpose of the Study:

    • To present a novel practical scheme for cascaded nonlinearity utilizing SE-SHG in a Fabry-Perot cavity.
    • To demonstrate the efficiency of this scheme for optical limiting and phase conjugation.

    Main Methods:

    • Implementation of a cascaded nonlinearity scheme.
    • Integration of surface-emitting second-harmonic generation.
    • Utilizing a Fabry-Perot resonant cavity.

    Main Results:

    • Efficient optical limiting demonstrated.
    • Effective optical phase conjugation achieved.
    • Low threshold pump power requirement (less than 100 mW).

    Conclusions:

    • The proposed scheme provides a practical and efficient method for nonlinear optical applications.
    • The integration of SE-SHG within a Fabry-Perot cavity enables low-power operation.
    • This approach is promising for developing advanced optical devices.