17 October 2012 Long distance fiber Bragg grating strain sensor interrogation using high speed Raman-based Fourier domain mode-locked fiber laser with recycled residual Raman pump
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Proceedings Volume 8421, OFS2012 22nd International Conference on Optical Fiber Sensors; 84213U (2012) https://doi.org/10.1117/12.966814
Event: OFS2012 22nd International Conference on Optical Fiber Sensor, 2012, Beijing, China
Abstract
We propose a novel fiber Bragg grating (FBG) sensor interrogation system using a Raman-based Fourier domain mode locking (FDML) fiber laser for a high speed and a long distance measurement. To improve transmission efficiency of the sensing probe signal over a long distance of 20-km, the residual pump powers are recycled. The external strain change can be measured by detecting the tine interval between two reflected signals from two FBGs as the Rama-based FDML is swept. The measured strain sensitivities with respect to the time are 0.19 ns/μstrain.
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Sunduck Kim, Oh-Jang Kwon, Young-Geun Han, "Long distance fiber Bragg grating strain sensor interrogation using high speed Raman-based Fourier domain mode-locked fiber laser with recycled residual Raman pump", Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84213U (17 October 2012); doi: 10.1117/12.966814; https://doi.org/10.1117/12.966814
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