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Related Concept Videos

Upsampling01:22

Upsampling

Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
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Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
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Published on: December 15, 2021

Measuring time-domain optical response functions with an optimized sampling rate.

F Perdu, I Lorgeré, J L Le Gouët

    Optics Letters
    |December 8, 2007
    PubMed
    Summary
    This summary is machine-generated.

    We introduce a novel time-domain interferometry technique to measure fast optical responses, even in low-repetition-rate experiments. This method overcomes traditional sampling limitations for advanced material analysis.

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    Area of Science:

    • Optical Physics
    • Spectroscopy
    • Materials Science

    Background:

    • Traditional interferometry methods are limited by sampling rate conditions.
    • Retrieving fast optical response functions often requires high repetition rates.
    • Amorphous spectral hole-burning materials offer unique filtering capabilities.

    Purpose of the Study:

    • To develop a time-domain interferometry method that bypasses standard sampling rate constraints.
    • To enable the measurement of fast optical response functions in low-repetition-rate experimental settings.
    • To align temporal dynamic range with spectral filter requirements.

    Main Methods:

    • Implementation of a time-domain interferometry technique.
    • Utilizing arbitrarily shaped spectral filters engraved in amorphous spectral hole-burning materials.
    • Circumventing the conventional sampling rate condition.

    Main Results:

    • Successful retrieval of fast optical response functions.
    • Demonstration of a method applicable to low-repetition-rate experiments.
    • Achieved temporal dynamic range compatible with advanced spectral filters.

    Conclusions:

    • The proposed time-domain interferometry method effectively measures fast optical responses.
    • This technique expands the possibilities for studying dynamic processes in materials.
    • It offers a powerful tool for characterizing optical properties with high spectral resolution.