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Theoretical Prediction of Fiber Coupling for Ellipsoidal Microlens

Published online by Cambridge University Press:  05 May 2011

C.-K. Chao ,
J.-Y. Hu ,
S.-Y. Hung  and
H. H. Yang
C.-K. Chao*
Affiliation:
Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 10607, R.O.C.
J.-Y. Hu*
Affiliation:
Department of Mechanical Engineering, National Taiwan University of Science and Technology, Taipei, Taiwan 10607, R.O.C.
S.-Y. Hung*
Affiliation:
Department of Automation Engineering, Nan Kai University of Technology, Nantou, Taiwan 54243, R.O.C.
H. H. Yang*
Affiliation:
Institute of Precision Engineering, National Chung Hsing University, Taichung, Taiwan 40227, R.O.C.
*
*Professor, corresponding author
**Graduate student
***Associate Professor
****Professor
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Abstract

A theoretical approach for an optical lens tip on a single-mode fiber end to improve power coupling from laser diode is presented in this work. The lens shape considered here is an ellipsoid. Based on scalar diffraction and Gaussian mode shapes for the laser and fiber fields, a theoretical model is developed to predict the coupling performance of this microlens. Theoretically, both a high coupling efficiency up to 77% and a large alignment tolerance for 10% off-peak are achieved. The proposed method facilitates mass production to achieve a high-yield and high-coupling efficiency that is suitable to be used in the commercial fiber transmission industry.

Keywords

Ellipsoid microlensLaser diodeSingle-mode fiberCoupling efficiency.
Type
Articles
Information
Journal of Mechanics , Volume 26 , Issue 1 , March 2010 , pp. 29 - 36
Copyright
Copyright © The Society of Theoretical and Applied Mechanics, R.O.C. 2010

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