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<p>In modern optical communication systems, achieving high efficiency in coupling lasers to optical fibers is more crucial than ever, as it directly influences the quality and reliability of data transmission. Recent breakthroughs have brought to light the substantial role that anti-reflection coatings (ARCs) on lens surfaces can play in enhancing this coupling efficiency (CE). By utilizing the ABCD matrix formalism, we have developed updated analytical expressions to quantify the CE between a laser diode and a circular core single-mode step-index fiber. This process is optimized by strategically positioning an anti-reflection coated ball lens at the fiber’s entrance. The ability of ARC to reduce reflections at the lens surface—and thus minimize signal losses—has become increasingly recognized as essential for improving overall efficiency. Our model begins with the assumption of a one-parameter Gaussian field distribution for both the laser source and the fiber. The study spans key telecommunications wavelengths of 1.3&#xa0;μm and 1.5&#xa0;μm, offering a contemporary analysis of how these coatings can affect coupling optics. Through a comparative analysis of CE with and without these coatings, we highlight their significant impact. Our method is designed to deliver precise predictions of coupling optics performance while remaining computationally efficient, making it a practical and valuable resource for optical fiber technology and signal processing professionals.</p>

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Boosting diode-to-fiber coupling efficiency in single-mode step-index fibers through anti-reflection coated ball lens mounted directly on the fiber

  • 期刊论文

  • 发表日期：

    2025年5月25日

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  • Bishnupriya Lahiri,
  • Vijay Kumar Baliyan,
  • Bishuddhananda Das,
  • Karuna Sindhu Malik

摘要

In modern optical communication systems, achieving high efficiency in coupling lasers to optical fibers is more crucial than ever, as it directly influences the quality and reliability of data transmission. Recent breakthroughs have brought to light the substantial role that anti-reflection coatings (ARCs) on lens surfaces can play in enhancing this coupling efficiency (CE). By utilizing the ABCD matrix formalism, we have developed updated analytical expressions to quantify the CE between a laser diode and a circular core single-mode step-index fiber. This process is optimized by strategically positioning an anti-reflection coated ball lens at the fiber’s entrance. The ability of ARC to reduce reflections at the lens surface—and thus minimize signal losses—has become increasingly recognized as essential for improving overall efficiency. Our model begins with the assumption of a one-parameter Gaussian field distribution for both the laser source and the fiber. The study spans key telecommunications wavelengths of 1.3 μm and 1.5 μm, offering a contemporary analysis of how these coatings can affect coupling optics. Through a comparative analysis of CE with and without these coatings, we highlight their significant impact. Our method is designed to deliver precise predictions of coupling optics performance while remaining computationally efficient, making it a practical and valuable resource for optical fiber technology and signal processing professionals.