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http://dx.doi.org/10.21289/KSIC.2020.23.6.943

Real-time Subtle Vibration Sensing of Optical Fiber Cable based on External-cavity Frequency-swept Laser  

Jang, Hansol (Department of Cogno-Mechatronics Engineering, Pusan National University)
Kim, Chang-Seok (Department of Cogno-Mechatronics Engineering, Pusan National University)
Publication Information
Journal of the Korean Society of Industry Convergence / v.23, no.6_2, 2020 , pp. 943-948 More about this Journal
Abstract
In this paper, we developed a fiber optic interferometer system based on frequency-swept laser. This frequency-swept laser with an external-cavity structure can generate a high coherent light with a linewidth of 132 kHz at 1552 nm. It also shows a superior swept linearity of R2 = 0.99995 under repetition rate of 200 kHz due to absence of mechanical moving parts in the laser cavity. By using a piezoelectric fiber optic stretcher, various vibration experiments were implemented, such as 0.5 to 2.0 kHz vibration signals with intervals of 0.5 kHz, with a sampling rate of 7 kHz. Real-time peak tracking can be successfully recovered according to the applied vibration frequency with high linearity of R2 = 0.99983.
Keywords
fiber optic sensor; frequency-swept laser; vibration sensing;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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