A Novel Microlens Employing a Quadrangular-Pyramid-Shaped Fiber Endface
| Autor: | Yu-Kuan Lu, 呂昱寬 |
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| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 We propose a new scheme of lensed fiber employing a quadrangular-pyramid-shaped fiber endface (QPSFE) for the coupling high-power 980nm laser diodes and single-mode fibers. The quadrangular-pyramid-shaped fiber was accomplished by first grinding and polishing a flat surface to the center of fiber at the desired inclination angle of θ, rotating the fiber to φ and polishing to the center of fiber, repeating the same process on the other sides of the fiber by rotating the fiber to π-φ and φ. Then the QPSFE was fabricated by heating the tip of quadrangular-pyramid-shaped fiber in a fusing splicer to form an elliptical microlens endface. A coupling efficiency of 85% has been demonstrated. This higher coupling efficiency of the QPSFE lensed fiber is attributed to the better matching of the elliptical Gaussian field distribution between the laser source and the fiber. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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