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Aluminum has become the material of choice for overhead transmission lines, surpassing copper due to its abundance and cost-effectiveness. The most prevalent type is the aluminum conductor, steel-reinforced (ACSR), which combines aluminum strands around a steel core. Other variants include all-aluminum conductors (AAC), all-aluminum alloy conductors (AAAC), aluminum conductor alloy-reinforced (ACAR), and aluminum-clad steel conductors. Advanced designs, such as aluminum conductors with steel...
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Power coupling between gain-guided index-antiguided planar waveguides.

Chih-Hsien Lai, Chang-I Hsieh

    Optics Express
    |December 2, 2016
    PubMed
    Summary

    Power coupling in gain-guided index-antiguided (GGIAG) planar waveguides shows periodic variations with core gap. Differences in power transfer lengths are due to the gain in low-index cores.

    Area of Science:

    • Optics and Photonics
    • Semiconductor Physics

    Background:

    • Gain-guided index-antiguided (GGIAG) planar waveguides are crucial components in optoelectronic devices.
    • Understanding power coupling dynamics is essential for optimizing device performance.

    Purpose of the Study:

    • To numerically investigate the power coupling characteristics between two adjacent GGIAG planar waveguides.
    • To analyze the influence of the inter-core gap on coupling strength and identify unique coupling behaviors.

    Main Methods:

    • Numerical simulation of coupled GGIAG planar waveguides.
    • Analysis of power transfer between waveguides as a function of the gap distance.
    • Investigation of the role of gain in the waveguide cores on coupling dynamics.

    Main Results:

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    • Coupling strength exhibits periodic variation with the gap between waveguide cores, linked to Fabry-Perot-like resonance.
    • The coupling length for minimum power in one waveguide differs from the coupling length for maximum power in the other.
    • Gain in the low-index cores is identified as the cause for the asymmetry in power transfer lengths.

    Conclusions:

    • The study elucidates the complex power coupling mechanisms in GGIAG planar waveguides.
    • The findings highlight the significant impact of core gain on asymmetric power exchange, offering insights for waveguide design.
    • Periodic coupling and gain-induced asymmetry present opportunities for novel optical device functionalities.