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    This study demonstrates a novel method for generating triangular-shaped waveforms using spectrum manipulation. The technique utilizes a specific modulation index range and standard optical components for high-quality signal generation.

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    Area of Science:

    • Photonics and Optical Engineering
    • Signal Processing

    Background:

    • Generating precise optical waveforms is crucial for advanced communication and signal processing systems.
    • Existing methods for triangular-shaped waveform generation often face limitations in quality and complexity.

    Purpose of the Study:

    • To propose and validate a novel approach for generating high-quality triangular-shaped optical waveforms.
    • To explore the role of spectrum manipulation and modulation index in achieving the desired waveform.

    Main Methods:

    • Employing spectrum manipulation by aligning power of five primary modulation sidebands.
    • Utilizing a single-drive Mach-Zehnder modulator, optical interleaver, and grating.
    • Validating the principle through theoretical analysis, numerical simulation, and experimental demonstration.

    Main Results:

    • Achieved optical intensity expression corresponding to the first two-term Fourier expansion of a triangular-shaped waveform.
    • Determined that the modulation index must be within a specific range (2-3) for optimal results.
    • Successfully generated a 20 GHz triangular-shaped waveform signal from a 10 GHz sinusoid signal.

    Conclusions:

    • The proposed spectrum manipulation technique effectively generates high-quality triangular-shaped waveforms.
    • The method is experimentally verified and shows potential for practical applications in optical signal generation.
    • The findings highlight the importance of controlling the modulation index for precise waveform synthesis.