| Author: | Yang, Zongru |
| Title: | Investigation of the tilted fiber bragg grating |
| Advisors: | Yu, Changyuan (EIE) |
| Degree: | M.Sc. |
| Year: | 2019 |
| Subject: | Hong Kong Polytechnic University -- Dissertations Optical fibers Bragg gratings Optical fiber detectors |
| Department: | Department of Electronic and Information Engineering |
| Pages: | ix, 55 pages : color illustrations |
| Language: | English |
| Abstract: | Fiber gratings have developed into a mature technology with a wide range of applications in various areas. The Tilted Fiber Bragg Grating (TFBG) is a special structure of passive components. It has many advantages such as light weight, small size, anti-electromagnetic interference and reusability. With a tilt angel, the incident core mode light can be couple to cladding modes, which have differential response for each mode that can be used to multiply the sensing modalities. Therefore, it has opened up a new world in the field of optical fiber communication and sensing. In this paper, the history and theory of TFBGs are introduced at first. In the next, OptiGrating optical simulation software is used to simulate the reflectivity and transmittivity spectrums with different structures of the TFBG and different environmental refractive indices, then corresponding spectrum changes can be obtained. In addition, FBGs and TFBGs are written for analysis, in which a good linear characteristic between wavelength shift and axial strain is obtained by observing their reflectivity spectrums. However, due to the low quality of transmittivity spectrum of TFBGs (almost no cladding modes can be seen), the further analysis of TFBGs cannot be completed. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 991022270855903411.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 2.82 MB | Adobe PDF | View/Open |
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