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    This study introduces a novel optical communication system using low-coherence interferometry for enhanced data modulation. The system demonstrates resilience to crosstalk, dispersion, and noise, enabling robust signal recovery.

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    Area of Science:

    • Optical Communications
    • Interferometry
    • Signal Processing

    Background:

    • Optical communication systems face challenges from crosstalk, dispersion, and noise, limiting channel capacity.
    • Low-coherence interferometry (LCI) offers potential for advanced data modulation through optical path differences.
    • Existing systems struggle with signal integrity due to amplified spontaneous emission (ASE) and other noise sources.

    Purpose of the Study:

    • To analyze signal integrity factors like crosstalk, dispersion, and SNR in an LCI-based optical communication system.
    • To investigate the potential of LCI for spectral and spatial multiplexing, increasing transmission channels.
    • To develop a theoretical framework for understanding noise and dispersion effects in LCI systems.

    Main Methods:

    • Detailed analysis of crosstalk, dispersion, and signal-to-noise ratio (SNR) in the LCI system.
    • Modeling dispersion effects using Taylor expansion of refractive index.
    • Development of a unified noise model encompassing ASE from EDFAs and Raman amplification.
    • Theoretical analysis of optical field phase influence on interference.

    Main Results:

    • The LCI system shows strong resilience to impairments like chromatic dispersion and crosstalk.
    • Partial coherence of the superluminescent source and interferometric architecture enhance signal integrity.
    • The proposed system enables spectral and spatial multiplexing for increased channel capacity.
    • Balanced detection interferometers effectively suppress common-mode noise, ensuring robust signal recovery.

    Conclusions:

    • The LCI-based optical communication system offers a robust solution for high-capacity data transmission.
    • The system's architecture effectively mitigates common noise sources and dispersion effects.
    • This approach provides a new degree of freedom for data modulation, enhancing system performance.