Analyses of Short- and Long period Fiber Gratings

• Main Authors: Jiun-jie Liau, 廖俊傑
• Other Authors: Nai-Hsiang Sun
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/55724657784524789588

碩士 === 義守大學 === 電機工程學系 === 91 === In this paper, we use couple mode theory (CMT) to obtain coupling equations, which include long period fiber grating and short period fiber grating. We use Runge-Kutta method and Eigenvalue technique to solve the coupling equations and compare the simulation results. Then Eigenvalue technique is chosen to simulate the spectrum. In long period fiber grating, the transmission spectrum of Uniform, Gaussian and Z-shift fiber grating structure are analyzed in this study. We compare the differences of transmission spectrums by changing the parameters of fiber grating structures. In short period fiber grating, the reflection spectrums of Uniform, Gaussian and Raised-cosine fiber grating structure are calculated with varied parameters. We derive a new formula from the coupled mode theory to calculate hybrid long/short period fiber grating structure. In this study, fiber grating structures include Superstructure, Phase shift and Linear chirped grating structure.