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Micro-hyperboloid lensed fibers for efficient coupling from laser chips.

Che-Hsin Lin, Szu-Chin Lei, Wen-Hsuan Hsieh

    Optics Express
    |October 19, 2017
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    Summary

    This study introduces a new method for creating micro-hyperboloid lensed fibers, achieving efficient light coupling for semiconductor lasers. The technique yields high coupling efficiency and low variation, optimizing fiber optic connections.

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    Area of Science:

    • Optoelectronics
    • Fiber Optics
    • Materials Science

    Background:

    • Efficient light coupling between single-mode fibers (SMF) and semiconductor lasers is crucial for optical communication systems.
    • Traditional methods often face challenges in achieving high coupling efficiency and low variation.

    Purpose of the Study:

    • To develop a novel technique for fabricating micro-hyperboloid lensed fibers.
    • To optimize the coupling efficiency between SMF and semiconductor laser chips.

    Main Methods:

    • A three-step process involving precision mechanical grinding, spin-on-glass (SOG) coating, and electrostatic pulling.
    • Formation of hyperboloid lens structures on a 6.6 μm core diameter SMF end face.
    • Tunable radii of curvature (4.18 - 4.83 μm) achieved for the lensed fibers.

    Main Results:

    • High average coupling efficiency of approximately 80% was achieved.
    • Low coupling variation of 0.116 ± 0.044% was demonstrated.
    • Successful fabrication of micro-hyperboloid lensed fibers with desired optical properties.

    Conclusions:

    • The developed method is efficient for producing micro-hyperboloid lensed fibers.
    • The technique enables high-performance light coupling between SMF and semiconductor diode lasers.
    • This advancement has significant implications for improving optical communication device performance.