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Software-defined reconfigurable VCSEL-based transmission.

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    This study introduces a programmable, self-adaptive VCSEL transponder for optical networks. It maintains transmission performance through monitoring and adaptive control, ensuring network reliability in diverse conditions.

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    Area of Science:

    • Optoelectronics
    • Optical Communications
    • Network Engineering

    Background:

    • Short-reach optical communication systems require robust and adaptive transponders.
    • Emerging network management protocols like NETCONF and YANG offer advanced control capabilities.
    • Variable environmental conditions significantly impact transponder performance and network stability.

    Purpose of the Study:

    • To propose and demonstrate a programmable, self-adaptive Vertical-Cavity Surface-Emitting Laser (VCSEL)-based transponder.
    • To integrate a monitoring system and controller for maintaining transmission performance.
    • To manage and control the transponder using the NETCONF protocol and YANG models.

    Main Methods:

    • Implementation of a VCSEL-based transponder with integrated monitoring and control plane.
    • Utilizing NETCONF and YANG for transponder management and configuration.
    • Emulating environmental variations (temperature changes, optical power loss) in both uncooled and cooled system scenarios.

    Main Results:

    • The transponder successfully adapted to slow temperature variations, avoiding service outages.
    • For rapid temperature changes (>1.3 °C/s), service outages occurred, triggering notifications.
    • In a cooled scenario, emulated power loss led to a data rate reconfiguration from 25 Gbps to 10 Gbps, restoring service.

    Conclusions:

    • The developed VCSEL transponder demonstrates effective self-adaptive capabilities for optical networks.
    • NETCONF and YANG protocols enable robust control and management for enhanced network resilience.
    • The system shows promise for short-reach, access, and metro applications requiring reliable optical transmission.