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Proceedings Paper

Long distance fiber Bragg grating strain sensor interrogation using high speed Raman-based Fourier domain mode-locked fiber laser with recycled residual Raman pump
Author(s): Sunduck Kim; Oh-Jang Kwon; Young-Geun Han
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Paper 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.

Paper Details

Date Published: 17 October 2012
PDF: 4 pages
Proc. SPIE 8421, OFS2012 22nd International Conference on Optical Fiber Sensors, 84213U (17 October 2012); doi: 10.1117/12.966814
Show Author Affiliations
Sunduck Kim, Hanyang Univ. (Korea, Republic of)
Oh-Jang Kwon, Hanyang Univ. (Korea, Republic of)
Young-Geun Han, Hanyang Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 8421:
OFS2012 22nd International Conference on Optical Fiber Sensors
Yanbiao Liao; Wei Jin; David D. Sampson; Ryozo Yamauchi; Youngjoo Chung; Kentaro Nakamura; Yunjiang Rao, Editor(s)

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