Surface Plasmon Resonance Sensor Based on Tilted Gratings
| Autor: | Kuan-ting Li, 李冠廷 |
|---|---|
| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 In this study, an optical fiber-based microsensor is developed by designing tilted optical fiber grating measurement system based on surface plasmon resonance technology. The tilted fiber gratings were applied to excite the surface plasma wave and evanescent coupling with a surface plasmon resonance. In order to improve its sensing sensitivity, we have polished single side of optical fiber in the written tilted fiber gratings. The fabrication process is divided into three steps. First, by writing tilted fiber gratings in optical fiber, the light can enter into cladding. Second, by using side polishing fabrication in the written tilted fiber gratings, enhance the evanescent field can be enhanced obviously. Finally, by using a sputtering machine to deposit metal films on the surface of optical fibers, they are main media of surface plasma resonance. The sensors have been completed after above-mentioned fabrication. In this study, the incident light with 780 nm wavelength was used as the laser source because the wavelength approaches surface plasmon resonance wavelength. It have good sensing sensitivity and the space of tilted fiber gratings is 780 nm. Experimental results show that the sensitivity of brine and blanching water are 48.11 nm/RIU and 158.73 nm/RIU respectively. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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