Title page for etd-0718106-105636


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URN etd-0718106-105636
Author Sheng-ho Wang
Author's Email Address M933020069@student.nsysu.edu.tw
Statistics This thesis had been viewed 5356 times. Download 2005 times.
Department Mechanical and Electro-Mechanical Engineering
Year 2005
Semester 2
Degree Master
Type of Document
Language English
Title A Novel Scheme of LPOF by Jointing an Aspheric Plastic Lens and a Plastic Fiber Using Laser Transmission Welding
Date of Defense 2005-07-12
Page Count 58
Keyword
  • laser welding
  • design of curvature
  • aspheric plastic lens
  • lensed fiber
  • plastic fiber
  • Abstract A novel lensed plastic optical fiber (LPOF) scheme to achieve the high coupling efficiency with a long working distance between the light source and LPOF is proposed. The advantages of the proposed LPOF are demonstrated by proofs of the experiment. In this study, an aspheric convex-concave plastic lens (CCPLs) is bonded with a flattened end of the plastic fiber by using the laser transmission welding (LTW) to form an aspheric-endface fiber. The working distance between the light source and LPOF can be increased with high coupling efficiency by the design of the CCPLs. According to the proposed design in this study, the working distance and the coupling efficiency can reach to 300μm and 80%, separately. Furthermore, the analysis shows that the LTW can achieve a high welding strength and a small heat affected zone that meets the commercial utilization. But the LTW technology has some restrictions, the disadvantages of the LTW technology are improved in this study to spread the application of the laser welding.
    Advisory Committee
  • Wood-hi Cheng - chair
  • Chen-wen Yen - co-chair
  • Tai-fa Young - co-chair
  • Yih-tun Tseng - advisor
  • Files
  • etd-0718106-105636.pdf
  • indicate access worldwide
    Date of Submission 2006-07-18

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