This thesis researches in the structure and fabrication of lensed fibers. To begin with, a novel method for automating fiber endface polishing to form quadrangular-pyramid-shaped fiber endface (QPSFE)-like shape is presented. This system successfully supported automatic polishing with an encouraged fiber tip offset. Such an automatic polishing system can also be applied to any other type of fiber endface. Next, an advanced polishing method to form an elliptical microlens endface from a QPSFE-like shape fiber is proposed. There are many advantages of this approach. First, the process to remove the tip of the fiber can be omitted and be replaced by the proposed process. This would raise the yield of the manufacturing of the lensed fiber and reducing manufacturing time and eliminating the possibility of human error. Second, after the process of the proposed method, an elliptic microlens is formed on the end of fiber and the fusing step can be skipped. In addition, in optical module packaging, laser welding used to attach components is expected to cause relative motion between the pre-aligned components. Such shifts might considerably reduce the efficiency of light coupling. This thesis provides a particular method to measurement the fiber shifts along the three axes quickly and precisely.
Furthermore, the efficient coupling of plastic optical fibers (POFs) to the light source has become critical. Two kinds of new schemes of lensed optical fiber for POFs are proposed. The first type of lensed plastic optical fiber (LPOF) scheme is fabricating a convexo-concave-shaped fiber endface (CCSFE) by joining a flat-end POF and a convexo-concave plastic lens (CCPL). The second type of LPOF scheme is fabricating a hyperbola shape LPOF by using electrical force. Both designs of the LPOF all have advantages of easy fabrication and automatic manufacture.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0116107-210153 |
| Date | 16 January 2007 |
| Creators | Hung, Tzu-Yu |
| Contributors | Chen-WenYen, Wood-Hi Cheng, Chi-Cheng Cheng, Yih-Tun Tseng, Wei-Huang Lin, Zhong-Min Lin |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | English |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0116107-210153 |
| Rights | unrestricted, Copyright information available at source archive |
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