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<p>Fiber-coupled laser diodes are crucial for industrial processing, laser pumping, fundamental sciences and medicine applications which demand high optical powers. Their versatility across hospitals and industries settings has motivated the increasing significance. However, attaining high-efficiency, reliable coupling remains a substantial engineering issue since it entails balancing the poor beam quality of laser diodes with the precise input requirements of single-mode fibers. This article discusses and compares several beam-shaping and coupling approaches, such as micro-optics, tapered lenses, and fiber-lens systems. It focuses on the trade-offs between coupling efficiency, brightness conservation, alignment tolerance, and beam quality. Our study demonstrate that no single approach is universally ideal; rather, the choice method is determined by the specific coupling between the laser diode’s beam parameter product and the application’s power and stability requirements. By combining these concepts, this review provides engineers and researchers with a framework for selecting and optimizing coupling systems, thereby advancing the development of more adaptable and dependable high-power laser diode sources.</p>

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A review on beam-shaping techniques for high-power and compact fiber-coupled diode laser system

  • 期刊论文

  • 发表日期：

    2026年1月29日

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  • Hind J. Jawad,
  • Afaf F. Sultan,
  • Eman K. Hassan

摘要

Fiber-coupled laser diodes are crucial for industrial processing, laser pumping, fundamental sciences and medicine applications which demand high optical powers. Their versatility across hospitals and industries settings has motivated the increasing significance. However, attaining high-efficiency, reliable coupling remains a substantial engineering issue since it entails balancing the poor beam quality of laser diodes with the precise input requirements of single-mode fibers. This article discusses and compares several beam-shaping and coupling approaches, such as micro-optics, tapered lenses, and fiber-lens systems. It focuses on the trade-offs between coupling efficiency, brightness conservation, alignment tolerance, and beam quality. Our study demonstrate that no single approach is universally ideal; rather, the choice method is determined by the specific coupling between the laser diode’s beam parameter product and the application’s power and stability requirements. By combining these concepts, this review provides engineers and researchers with a framework for selecting and optimizing coupling systems, thereby advancing the development of more adaptable and dependable high-power laser diode sources.