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Semiellipsoid microlens fabrication method using UV proximity printing.

Chien-Hsin Hung1, Shih-Yu Hung, Ming-Ho Shen

  • 1Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung, Taiwan.

Applied Optics
|March 14, 2012
PubMed
Summary

A novel UV lithography method fabricates semiellipsoid microlenses for improved fiber optic coupling. This technique enhances mass production yield and optical coupling efficiency in laser diode to single-mode fiber systems.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Manufacturing Engineering

Background:

  • Efficient optical coupling is crucial for laser diode to single-mode fiber systems.
  • Existing microlens fabrication methods may lack precision or scalability.
  • Semiellipsoid microlenses offer advantages in increasing fiber spot size and numerical aperture.

Purpose of the Study:

  • To introduce a new semiellipsoid microlens fabrication method using UV lithography without thermal reflow.
  • To precisely control geometric parameters for enhanced optical coupling efficiency.
  • To facilitate mass production of high-yield, high-coupling microlenses for commercial fiber transmission.

Main Methods:

  • UV proximity printing to control the curvature radius ratio of semiellipsoid microlenses.

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  • Development of a theoretical model to predict optical coupling efficiency.
  • Application of the Taguchi method for optimizing geometric parameters.

    • Main Results:

    • The proposed UV lithography method enables precise control over microlens geometry.
    • A theoretical model accurately predicts optical coupling efficiency based on microlens geometry and assembly parameters.
    • The Taguchi method identified optimal geometric parameters, significantly improving optical coupling efficiency.

    Conclusions:

    • The new semiellipsoid microlens fabrication method offers precise control, high yield, and mass production capabilities.
    • Optimized geometric parameters lead to significantly improved optical coupling efficiency.
    • This method provides wide misalignment tolerance, low loss, and low manufacturing cost for fiber optic systems.