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Related Concept Videos

Rectangular and Triangular Pulse Function01:19

Rectangular and Triangular Pulse Function

The unit rectangular pulse function is mathematically represented by a rectangular function centered at the origin with a height of one unit. This function is defined by two parameters: T, which specifies the center location of the pulse along the time axis, and τ, which determines the pulse duration.
For example, consider a rectangular pulse with a 5V amplitude, a 3-second duration, and centered at t=2 seconds. This pulse can be expressed using the rectangular function, written as,
Sound as Pressure Waves01:17

Sound as Pressure Waves

Sound waves, which are longitudinal waves, can be modeled as the displacement amplitude varying as a function of the spatial and temporal coordinates. As a column of the medium is displaced, its successive columns are also displaced. As the successive displacements differ relatively, a pressure difference with the surrounding pressure is created. The gauge pressure varies across the medium.
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Impulse Response01:17

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The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
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Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
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Published on: January 28, 2019

Volume holographic pulse shaping.

D Brady, A G Chen, G Rodriguez

    Optics Letters
    |October 2, 2009
    PubMed
    Summary
    This summary is machine-generated.

    Volume holograms enable subpicosecond pulse shaping. Experiments show a 2-THz beat frequency in diffracted pulses using camphorquinone-doped plastic holograms and colliding-pulse mode-locked lasers.

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    Area of Science:

    • Optics and Photonics
    • Materials Science

    Background:

    • Subpicosecond pulse shaping is crucial for ultrafast optical applications.
    • Volume holograms offer potential for advanced optical control.

    Purpose of the Study:

    • To describe and experimentally validate the use of volume holograms for subpicosecond pulse shaping.
    • To investigate the performance of camphorquinone-doped plastic holograms in this application.

    Main Methods:

    • Fabrication of camphorquinone-doped plastic volume holograms.
    • Probing the holograms with a colliding-pulse mode-locked laser.
    • Analysis of the diffracted optical pulses.

    Main Results:

    • Successful demonstration of subpicosecond pulse shaping using volume holograms.
    • Observation of a significant 2-THz beat frequency in the diffracted pulse.
    • Characterization of the holographic material's performance.

    Conclusions:

    • Volume holograms are effective for precise subpicosecond optical pulse shaping.
    • Camphorquinone-doped plastics provide a viable medium for holographic pulse shaping.
    • The observed beat frequency indicates controlled manipulation of optical frequencies.