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http://dx.doi.org/10.3807/KJOP.2012.23.5.211

Resonance Fiber Bragg Grating Sensor system based on Fourier Domain Mode-locking Laser  

Choi, Byeong Kwon (Department of Physics, Chungnam National University)
Jeon, Min Yong (Department of Physics, Chungnam National University)
Publication Information
Korean Journal of Optics and Photonics / v.23, no.5, 2012 , pp. 211-216 More about this Journal
Abstract
We report a resonance fiber Bragg sensor interrogation based on a Fourier domain mode-locking (FDML) laser. The FDML laser is constructed based on a conventional ring laser cavity configuration with fiber Fabry-Perot tunable filter (FFP-TF). There are two sensor parts which are composed with two FBGs inside the laser cavity. Each sensor part provides a separate laser cavity for the FDML laser. The resonance frequencies of the laser cavities are 46.687 kHz and 44.340 kHz, respectively. We applied a static and a dynamic strain on the FBG sensor system. The slope coefficients of the measured relative wavelength shift and relative time interval from the static strain are found to be $0.61pm/{\mu}{\epsilon}$ and $0.8ns/{\mu}{\epsilon}$, respectively.
Keywords
Fourier domain mode-locking laser; Fiber Bragg grating (FBG); Fiber Fabry-Perot tunable filter;
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