| Author: | Chen, Xuan |
| Title: | Temperature sensing system based on tilted fiber bragg grating |
| Advisors: | Yu, Changyuan (EEE) |
| Degree: | M.Sc. |
| Year: | 2023 |
| Department: | Department of Electrical and Electronic Engineering |
| Pages: | 63 pages : color illustrations |
| Language: | English |
| Abstract: | Among new passive optical devices, fiber Bragg gratings have emerged, which have many uses, such as in fiber optic communication systems and fiber optic sensing. Compared with the traditional fiber grating field, Fiber Bragg Grating (FBG) as an important part of optical passive components, is widely used in the all-optical field. Communication network, electronic semiconductor and other industries. Among them, the fiber grating surface and the fiber integration are not parallel to each other, so now its main research is concentrated in the field of sensing, and it is often used as a sensor. In recent years, it is still often used in the field of sensing demodulation. This dissertation first introduces the principle, classification, application fields and advantages of fiber gratings. Secondly, the research and application fields of fiber grating are introduced. Then, the principle, structure, preparation, current application fields and quarter research status of optical fiber are introduced, followed by an analysis of its demodulation technology, using coupled mode theory (CMT) and transmission matrix theory to analyze tilt The mode coupling method, humidity sensing characteristics and theoretical analysis of fiber optic temperature sensing characteristics. Finally, analysis of laser direct writing technology to prepare tilted fiber gratings and prepare a temperature sensor using a tilted grating as the main body to measure temperature. The sensor structure, performance and spectral characteristics are compared and analyzed, and the characteristics of various tilted gratings are summarized. The TFBG sensor has the advantages of large range and high sensitivity sensing. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 8278.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 2.83 MB | Adobe PDF | View/Open |
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