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Related Experiment Video

Updated: Jul 20, 2025

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

9.0K

Tunable, coherent optical comb source via on-chip bidirectional coupling.

John McCarthy, Diarmuid O'Sullivan, Maryam Shayesteh

    Optics Letters
    |August 1, 2023
    PubMed
    Summary
    This summary is machine-generated.

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    A novel photonic integrated circuit (PIC) generates stable frequency combs via gain switching. This tunable comb source utilizes coupled lasers on-chip, offering a compact solution for optical frequency generation.

    Area of Science:

    • Photonics
    • Integrated Optics
    • Laser Physics

    Background:

    • Frequency combs are crucial for precise optical measurements.
    • On-chip generation of frequency combs offers miniaturization and integration advantages.
    • Previous methods often lacked stability or tunability in integrated platforms.

    Purpose of the Study:

    • To demonstrate a tunable frequency comb source on a photonic integrated circuit (PIC).
    • To investigate the stability and characteristics of on-chip generated frequency combs.
    • To explore the role of integrated device parameters in comb generation.

    Main Methods:

    • Utilized a three-sectioned PIC with two mutually coupled lasers and a passive waveguide.
    • Employed gain switching on a Fabry-Perot laser to produce frequency combs.

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    Last Updated: Jul 20, 2025

    Generation and Coherent Control of Pulsed Quantum Frequency Combs
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    Generation and Coherent Control of Pulsed Quantum Frequency Combs

    Published on: June 8, 2018

    9.0K
    Quasi-light Storage for Optical Data Packets
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    Quasi-light Storage for Optical Data Packets

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  • Leveraged bidirectional coupling for phase-locking and comb generation in a tunable laser.

    • Main Results:

    • Achieved stable frequency combs with line spacings from 3.5 to 8 GHz.
    • Demonstrated comb generation in both coupled lasers despite lack of optical isolation.
    • Observed stable comb generation attributed to short on-chip delay times.

    Conclusions:

    • The demonstrated PIC is a viable platform for tunable, stable frequency comb generation.
    • On-chip bidirectional coupling is effective for phase-locking and comb generation.
    • Short delay times inherent to PICs play a critical role in comb stability.