Title page for etd-0712104-161501


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URN etd-0712104-161501
Author Yue-Lin He
Author's Email Address No Public.
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Department Mechanical and Electro-Mechanical Engineering
Year 2003
Semester 2
Degree Master
Type of Document
Language zh-TW.Big5 Chinese
Title A Study of Post-Weld-Shift Measurement Technology in Cylindrical-Type Laser Diode Module Packages
Date of Defense 2004-07-08
Page Count 58
Keyword
  • SCM (Symmetric Center Method)
  • PWS (Post-Weld-Shift) measurement
  • TO-Can
  • EFM (Ellipse Fitting Method)
  • Abstract The objective of this study is to investigate the technique of the PWS (Post-Weld-Shift) measurement in cylindrical-type laser diode module packaging processes. Including measure the shift in focus plane and the run-out between the axis of laser diode and optical fiber. The objective of this technique is to quantify the PWS in packaging processes. This technique can improve the efficient of the laser hammering technique.
    The measurement technique developed in this study employs a laser displacement meter (Keyence LC-2430) to measure the profile and position the upper housing of laser diode module. Using the concepts of ellipse and symmetric figure, the Ellipse Fitting Method (EFM) and the Symmetric Center Method (SCM) are developed. A simulation program is coded for discussing the relationship between the measurement error and the roundness of the optical fiber housing. Finally, these measuring technique are applied on the laser diode module packaging system (Newport-LW4000) to measure the PWS. The experimental measuring data of PWS is 3.5μm, which is reasonable in compare to the estimate alignment offset (2.9μm to 5.9μm) by the coupling efficiency method. Therefore it is believed that the technique developed in this study is feasible and practical.
    Advisory Committee
  • Wood-Hi Cheng - chair
  • Jao-Hwa Kuang - co-chair
  • Der-Min Tsay - co-chair
  • Ying-Chien Tsai - advisor
  • Files
  • etd-0712104-161501.pdf
  • indicate accessible in a year
    Date of Submission 2004-07-12

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