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Low-power variable optical attenuator based on a hybrid SiON-polymer S-bend waveguide.

Lingfang Wang, Qianqian Song, Jieyun Wu

    Applied Optics
    |February 25, 2016
    PubMed
    Summary

    This study presents a novel low-power variable optical attenuator using silicon oxynitride (SiON)-polymer hybrid waveguides. The device achieves significant optical attenuation with minimal electrical power, improving heat efficiency.

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    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science
    • Electrical Engineering

    Background:

    • Variable optical attenuators (VOAs) are crucial components in optical communication systems.
    • Existing VOAs often face challenges with power consumption and efficiency.
    • Hybrid material integration offers potential for enhanced device performance.

    Purpose of the Study:

    • To propose and demonstrate a novel low-power variable optical attenuator.
    • To leverage the complementary thermo-optic properties of silicon oxynitride (SiON) and polymer materials.
    • To enhance heat utilization efficiency in optical attenuation devices.

    Main Methods:

    • Design of a hybrid S-bend waveguide using silicon oxynitride (SiON) and polymer.
    • Integration of grooves alongside the S-bend core to enhance thermo-optic effects.
    • Theoretical simulation and experimental fabrication of the proposed VOA device.

    Main Results:

    • Theoretical simulations predicted ~50 dB optical attenuation with only 3.6 mW electrical power.
    • A fabricated 8 mm device achieved a maximum optical attenuation of 46 dB.
    • The fabricated device exhibited a low insertion loss of 5.4 dB.

    Conclusions:

    • The proposed hybrid SiON-polymer S-bend waveguide configuration is effective for low-power optical attenuation.
    • The design maximizes heat utilization efficiency through complementary material properties.
    • This approach offers a promising solution for efficient variable optical attenuators.