Characteristic Analyses and Experimental Measurements on Traditional Fiber Bragg Grating and Corrugated Long Period Fiber Grating

• Main Authors: Tien-Chieh Yeh, 葉天傑
• Other Authors: Chien-Ching Ma
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/84390136211971808409

碩士 === 國立臺灣大學 === 機械工程學研究所 === 90 === By characterizing the variations of optic propagation behavior from the perturbation of applied mechanic forces and the temperature difference through theoretical analyses and experimental results, two different types of fiber gratings, including the traditional fiber Bragg grating that manufactured by using phase mask method and the corrugated long period fiber grating that made by techniques similar to the lithography procedure of semiconductor manufacturing are analyzed in this research. For the traditional fiber Bragg grating that already has well-developed theories, we discuss the ability and limitation for use this device as high sensitive sensors. Furthermore, we also combine the traditional fiber Bragg grating with multilayer piezoelectric actuator to use as the tunable device for the dense wavelength division multiplexed system. Applying loads on corrugated long period fiber grating is a new way for forming fiber gratings. In this thesis, we illustrate the characteristics and design parameters by the experimental results. We also develop a method using conventional coupled-mode theory, photo-elastic theory and finite element analysis to explain and analyze experimental results.