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Related Concept Videos

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences01:17

NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences

A pulse is a short burst of radio waves distributed over a range of frequencies that simultaneously excites all the nuclei in the sample. Upon passing a radio frequency pulse along the x-axis, the nuclei absorb energy corresponding to their Larmor frequencies and achieve resonance. This shifts the net magnetization vector from the z-axis toward the transverse plane. This angle of rotation of the magnetization vector, or the flip angle, is proportional to the duration and intensity of the pulse.

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Related Experiment Video

Updated: Jun 22, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Line-by-line pulse shaping control for optical arbitrary waveform generation.

Z Jiang, D E Leaird, A M Weiner

    Optics Express
    |June 9, 2009
    PubMed
    Summary
    This summary is machine-generated.

    We demonstrate line-by-line pulse shaping for optical arbitrary waveform generation (O-AWG). This technique precisely controls individual spectral lines, enabling the synthesis of complex ultrafast optical waveforms with high fidelity.

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    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

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    Last Updated: Jun 22, 2026

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    Generation and Coherent Control of Pulsed Quantum Frequency Combs
    06:42

    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    Area of Science:

    • Ultrafast science
    • Optical physics
    • Quantum optics

    Background:

    • Mode-locked frequency combs provide a rich source of discrete spectral lines.
    • Precise control over optical waveforms is crucial for various scientific applications.

    Purpose of the Study:

    • To demonstrate a novel method for generating complex optical waveforms.
    • To achieve independent control over spectral amplitude and phase of individual spectral lines.

    Main Methods:

    • Implementation of line-by-line pulse shaping control.
    • Utilizing a mode-locked frequency comb as the light source.
    • Independent manipulation of spectral amplitude and phase for each line.

    Main Results:

    • Successful synthesis of user-specified ultrafast optical waveforms.
    • Demonstration of unprecedented control over waveform generation.
    • Validation of line-by-line spectral control for O-AWG.

    Conclusions:

    • Line-by-line pulse shaping is a fundamental operation for O-AWG.
    • This technique offers significant potential impact for ultrafast science.
    • Advances in frequency-stabilized lasers enhance the applicability of this method.