Vibration sensing and positioning applications of fiber Bragg gratings and arrayed waveguide gratings

• Main Authors: Xin-Yu Liao, 廖昕昱
• Other Authors: 鄭旭志
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/ey7v73

碩士 === 國立虎尾科技大學 === 光電工程系光電與材料科技碩士班 === 105 === In this study, we combine fiber Bragg grating and arrayed waveguide grating to achieve vibration sensing system. The reflection wavelength of fiber Bragg grating is sensitive to strain, temperature and vibration. When the vibration signal applied to the fiber Bragg grating, it will caused the center wavelength changed. Utilize the slope of the arrayed waveguide grating pass band to accomplish light intensity modulation. Arrayed waveguide gratings can use multiple fiber Bragg gratings for multi-point measurements. We use two fiber Bragg grating sensors to measure vibration. We apply vibration signal between two fiber Bragg gratings. The oscilloscope shows the different time of two measured signals. We can calculated distance which is vibration signal between the two fiber Bragg gratings.