title: A fiber Bragg grating sensor interrogation system based on a linearly wavelength-swept thermo-optic laser chip.
abstract: A linearized wavelength-swept thermo-optic laser chip was applied to demonstrate a fiber Bragg grating (FBG) sensor interrogation system. A broad tuning range of 11.8 nm was periodically obtained from the laser chip for a sweep rate of 16 Hz. To measure the linear time response of the reflection signal from the FBG sensor, a programmed driving signal was directly applied to the wavelength-swept laser chip. The linear wavelength response of the applied strain was clearly extracted with an R-squared value of 0.99994. To test the feasibility of the system for dynamic measurements, the dynamic strain was successfully interrogated with a repetition rate of 0.2 Hz by using this FBG sensor interrogation system.
authors.affiliation: Department of Cogno-Mechatronics Engineering, World Class University Program, Pusan National University, Busan, 609-735, Korea. rahido@pusan.ac.kr.
authors.forename: Hyung-Seok
authors.initials: HS
authors.lastname: Lee
authors.affiliation: Department of Cogno-Mechatronics Engineering, World Class University Program, Pusan National University, Busan, 609-735, Korea. rahido@pusan.ac.kr.
authors.forename: Hwi Don
authors.initials: HD
authors.lastname: Lee
authors.affiliation: Department of Production Engineering Research Institute, LG Electronics, Pyeongtaek-si, 451-713, Korea. khj1004@hanmail.net.
authors.forename: Hyo Jin
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Biomedical Engineering, University of California Irvine, CA 92612, USA. jaeduc1@uci.edu.
authors.forename: Jae Du
authors.initials: JD
authors.lastname: Cho
authors.affiliation: Department of Cogno-Mechatronics Engineering, World Class University Program, Pusan National University, Busan, 609-735, Korea. myjeong@pusan.ac.kr.
authors.forename: Myung Yung
authors.initials: MY
authors.lastname: Jeong
authors.affiliation: Department of Cogno-Mechatronics Engineering, World Class University Program, Pusan National University, Busan, 609-735, Korea. ckim@pusan.ac.kr.
authors.forename: Chang-Seok
authors.initials: CS
authors.lastname: Kim