光纖光柵應變感測系統之研製

Abstract

在本論文中我們針對兩種光纖光柵應變感測系統作詳細之研究。第一種架構係利用光纖Fabry-Perot 濾波器架設一可調輸出波長之光纖雷射當感測光源並利用此光源配合光纖光柵作感測元件來量測應變，初步上量測之解析度可達到1.2me / O Hz 。第二種架構係使用摻鉺光纖產生寬頻光源並利用Linear Discriminator FBG 作被動解調之應變感測，初步上可量測到之最小應變量為20me。

In this thesis we perform a detailed study on two kinds of fiber Bragg grating strain sensor systems. The first system uses a tunable fiber Fabry-Perot filter to form a wavelength-swept erbium-doped fiber laser, which is then used as the tunable optical source for Bragg grating sensor interrogation. A measurement resolution of 1.2me / O Hz is demonstrated by using suitable signal processing methods. The second system uses a Er-fiber ASE broadband source and a linear discriminator fiber Bragg grating for high speed strain measurement. A resolution of 20me has been demonstrated by using a simple experimental setup.