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Generation and Coherent Control of Pulsed Quantum Frequency Combs
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Electro-optic frequency combs for rapid interrogation in cavity optomechanics.

D A Long, B J Reschovsky, F Zhou

    Optics Letters
    |February 2, 2021
    PubMed
    Summary

    Electro-optic frequency combs offer superior spectral resolution for optomechanical sensors compared to mode-locked combs. This advanced method enables rapid, parallel measurements across a wide frequency range for diverse sensor applications.

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    Area of Science:

    • Optics and Photonics
    • Sensor Technology
    • Integrated Photonics

    Background:

    • Optomechanical sensors are crucial for precision measurements.
    • Traditional interrogation methods using mode-locked frequency combs have limitations in spectral resolution and measurement speed.
    • Laser-locking techniques restrict parallel data acquisition and dynamic range.

    Purpose of the Study:

    • To demonstrate superior spectral resolution in optomechanical sensors using electro-optic frequency combs.
    • To develop a rapid and parallel interrogation technique for optomechanical sensors.
    • To explore the applicability of this method across a wide range of cavity optomechanical sensors.

    Main Methods:

    • Generation of frequency combs using an integrated-circuit-based direct digital synthesizer.
    • Utilization of frequency combs in a self-heterodyne configuration for sensor interrogation.
    • Implementation of rapid, parallel measurements of optical cavity modes.

    Main Results:

    • Achieved spectral resolution substantially exceeding that of mode-locked frequency combs.
    • Enabled rapid, parallel measurements of full optical cavity modes.
    • Demonstrated a large dynamic range of sensor displacement and wide frequency acquisition (DC to 500 kHz).

    Conclusions:

    • Electro-optic frequency combs provide a powerful and versatile tool for interrogating optomechanical sensors.
    • This approach overcomes limitations of previous methods, offering enhanced performance for acceleration measurements and other cavity optomechanical sensing applications.
    • The integrated photonic approach facilitates compact and efficient sensor systems.