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Related Concept Videos

Speed of a Transverse Wave01:13

Speed of a Transverse Wave

The speed of a wave depends on the characteristics of the medium. For example, in the case of a guitar, the strings vibrate to produce the sound. The speed of the waves on the strings and the wavelength determine the frequency of the sound produced. The strings on a guitar have different thicknesses but may be made of similar material. They have different linear densities, and the linear density is defined as the mass per length.
One of the key properties of any wave is the wave speed. Light...
Wave Parameters01:10

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Velocity and Acceleration of a Wave00:51

Velocity and Acceleration of a Wave

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Propagation of Waves

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Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
08:54

Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

Published on: February 13, 2018

A fast modal wave-front sensor.

E Ribak, S Ebstein

    Optics Express
    |May 8, 2009
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces an instantaneous modal wave-front sensor using a Shack-Hartmann array and electro-optic processing. It achieves MHz bandwidths for real-time wave-front analysis, crucial for adaptive optics and turbulence sensing.

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    Last Updated: Jun 23, 2026

    Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing
    08:54

    Measurements of Waves in a Wind-wave Tank Under Steady and Time-varying Wind Forcing

    Published on: February 13, 2018

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
    09:03

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

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    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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    Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

    Published on: November 7, 2016

    Area of Science:

    • Optics and Photonics
    • Wave-front Sensing Technology
    • Adaptive Optics

    Background:

    • Wave-front sensing is critical for applications like astronomy and laser beam control.
    • Traditional methods often involve complex reconstruction steps, limiting real-time performance.
    • High-bandwidth sensing is required for dynamic environments such as atmospheric turbulence.

    Purpose of the Study:

    • To develop an instantaneous modal wave-front sensor.
    • To eliminate the need for a separate wave-front reconstructor.
    • To achieve high-bandwidth, real-time measurement of wave-front modes.

    Main Methods:

    • Utilized a Shack-Hartmann lenslet array to encode wave-front distortions.
    • Employed a novel parallel electro-optic processor for continuous spot pattern conversion.
    • Integrated readily available components for sensor construction.

    Main Results:

    • Demonstrated an instantaneous conversion of spot patterns to wave-front modes (e.g., Zernike polynomials).
    • Achieved MHz bandwidths for up to twenty modes using off-the-shelf components.
    • Showcased adaptable bandwidth, sensitivity, and bit depth per mode for optimal matching to disturbances.

    Conclusions:

    • The developed sensor provides real-time, high-bandwidth modal wave-front analysis.
    • It has direct applications in beam control and turbulence sensing.
    • The sensor can directly provide control signals for adaptive optics systems.