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Characterization of depolarized GAWBS for optomechanical sensing of liquids outside standard fibers
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Paper Abstract

We report an experimental study on the spectral dependence of depolarized guided acoustic-wave Brillouin scattering (GAWBS) in a silica single-mode fiber (SMF) on acoustic impedance of external materials. The GAWBS spectrum was measured when the acoustic impedance was changed from 1.51 to 2.35 kg/s⋅mm2. With increasing acoustic impedance, the linewidth increased; the dependence was almost linear in the range up to ∼2.0 kg/s⋅mm2 with an acoustic impedance dependence coefficient of 0.16 MHz/kg/s⋅mm2, which is directly applicable to acoustic impedance sensing. Meanwhile, with increasing acoustic impedance, the central frequency nonlinearly decreased, which probably originates from the change in the effective outer diameter of the silica SMF.

Paper Details

Date Published: 23 April 2017
PDF: 4 pages
Proc. SPIE 10323, 25th International Conference on Optical Fiber Sensors, 103230M (23 April 2017); doi: 10.1117/12.2262964
Show Author Affiliations
Neisei Hayashi, The Univ. of Tokyo (Japan)
Yosuke Mizuno, Tokyo Institute of Technology (Japan)
Kentaro Nakamura, Tokyo Institute of Technology (Japan)
Sze Yun Set, The Univ. of Tokyo (Japan)
Shinji Yamashita, The Univ. of Tokyo (Japan)


Published in SPIE Proceedings Vol. 10323:
25th International Conference on Optical Fiber Sensors
Youngjoo Chung; Wei Jin; Byoungho Lee; John Canning; Kentaro Nakamura; Libo Yuan, Editor(s)

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