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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
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All-optical microwave oscillator based on a mutual-injection coupling between DFB-LDs.

Jian Tang, Guangfu Bai, Yanling Tang

    Optics Express
    |November 11, 2022
    PubMed
    Summary

    This study introduces an all-optical microwave oscillator (AOMO) using distributed feedback laser diodes (DFB-LDs). The novel AOMO generates a stable, tunable microwave signal with excellent phase noise performance.

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    Area of Science:

    • Photonics
    • Optoelectronics
    • Microwave Engineering

    Background:

    • Traditional microwave oscillators often rely on electronic components, limiting performance and stability.
    • All-optical approaches offer potential advantages in terms of bandwidth, phase noise, and miniaturization.

    Purpose of the Study:

    • To propose and experimentally demonstrate a novel all-optical microwave oscillator (AOMO).
    • To achieve a highly stable and tunable microwave signal generation using only optical components.

    Main Methods:

    • Utilizing a mutual injection loop with two distributed feedback laser diodes (DFB-LDs).
    • Leveraging period-one (P1) oscillation in one DFB-LD as the microwave seed signal.
    • Employing optical injection locking and optical-optical modulated effects for signal enhancement and stabilization.

    Main Results:

    • Demonstrated a highly stable single-mode microwave signal at 16.69 GHz.
    • Achieved a single-sideband (SSB) phase noise of -90.7 dBc/Hz at 10 kHz offset.
    • Showcased wide frequency tunability from 14.48 GHz to 21.45 GHz.

    Conclusions:

    • The proposed AOMO design offers a promising solution for generating high-performance microwave signals.
    • The all-optical approach simplifies the oscillator structure and enhances stability and tunability.
    • This technology has potential applications in advanced communication and sensing systems.