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Broadband frequency modulation signal downconversion using a monolithic integrated mutual injection laser.

Shilin Chen, Tao Pu, Jilin Zheng

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    |September 14, 2023
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    Summary
    This summary is machine-generated.

    This study introduces a novel broadband signal downconversion method using a monolithic integrated laser. This technique enables wide tuning ranges for radar signal processing without external components.

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    Area of Science:

    • Photonics
    • Electrical Engineering
    • Signal Processing

    Background:

    • Traditional signal downconversion methods often require bulky discrete components, including local oscillators and external modulators.
    • Achieving broadband signal processing with wide tuning ranges presents significant engineering challenges.

    Purpose of the Study:

    • To propose and validate a new broadband signal downconversion scheme.
    • To demonstrate a tunable downconversion range using a monolithic integrated mutual injection laser.
    • To provide a compact and efficient alternative for radar signal processing.

    Main Methods:

    • Mathematical derivation and simulation of the proposed scheme.
    • Experimental verification using a monolithic integrated mutual injection laser.
    • Characterization of the downconversion range and spurious-free dynamic range (SFDR).

    Main Results:

    • Successful broadband signal downconversion of a linear frequency modulation signal with a 0.5 GHz bandwidth.
    • Achieved downconversion from a center frequency of 18.75 GHz to 0.85 GHz.
    • Demonstrated a spurious-free dynamic range (SFDR) of 71.7 dB/Hz^(2/3).

    Conclusions:

    • The monolithic integrated mutual injection laser enables a wide, tunable downconversion range by controlling laser current.
    • The proposed scheme eliminates the need for external electric local oscillators and modulators, simplifying radar systems.
    • This integrated approach offers a promising method for efficient radar signal downconversion.