Title page for etd-0813107-155753


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URN etd-0813107-155753
Author Han-wei Lu
Author's Email Address m943020007@student.nsysu.edu.tw
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Department Mechanical and Electro-Mechanical Engineering
Year 2006
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title The Effect of Elliptic-Conical Lensed Fiber Parameters on the Coupling Efficiency
Date of Defense 2007-07-13
Page Count 106
Keyword
  • elliptic-conical lensed fiber
  • coupling efficiency
  • radius of curvature
  • laser diode
  • Abstract A simulation scheme is proposed to analyze the effects of elliptic-conical lensed fiber parameters on the coupling efficiency between a 980nm laser diode and single-mode fiber(SMF). The variation of fiber tip shapes with different melting zone volumes was investigated in this thesis. The heat-transfer finite element model in MARC package is employed to simulate the temperature distribution during the melting process. The free convection is considered in predicting the melting zone. Due to the surface tension, a round tip may be solidificated. In this study an elliptical tip lens is expected to improve the coupling efficiency. The microlens shapes with different radius of curvature is simulated with the software of Surface Evolver. The coupling efficiency of 980nm laser source and different elliptic-conical lensed fiber is calculated by utilizing the ZEMAX optical analysis software. The Taguchi method is employed to evaluate the effect of tip shape parameters on the coupling efficiency. The optimal elliptic-conical lensed fiber parameters has also been proposed. The efficiency loss introduced from the misalignments in laser module packaging has also been discussed in this study.
    Advisory Committee
  • Ying-chien Tsai - chair
  • Der-min Tsay - co-chair
  • Yung-chuan Chen - co-chair
  • Jao-hwa Kuang - advisor
  • Files
  • etd-0813107-155753.pdf
  • indicate in-campus access in a year and off_campus not accessible
    Date of Submission 2007-08-13

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