Title:
OPTICAL FIBER SENSING DEVICE AND OPTICAL FIBER SENSING METHOD
Document Type and Number:
WIPO Patent Application WO/2014/091755
Kind Code:
A1
Abstract:
This optical fiber sensing device comprises: a means of generating first light that propagates within an optical fiber; a means for generating second light that has a lower frequency than the first light and which propagates in the opposite direction to the first light; a means for generating third light having a plurality of modulating frequencies and which has a modulation speed which is faster than that of the first and second light; and a means of comparing, for each modulation frequency, the third light and the scattered light of the third light. As a result of this configuration, it is possible to shorten the measurement time without detriment to measurement accuracy.
Inventors:
SUZUKI NAOFUMI (JP)
Application Number:
PCT/JP2013/007284
Publication Date:
June 19, 2014
Filing Date:
December 11, 2013
Export Citation:
Assignee:
NEC CORP (JP)
International Classes:
G01D5/353; G01M11/00
Foreign References:
| US20080013096A1 | 2008-01-17 | |||
| JP2003098037A | 2003-04-03 |
Other References:
CHIN SANGHOON ET AL.: "Sub-Centimeter Spatial Resolution in Distributed Fiber Sensing Based on Dynamic Brillouin Grating in Optical Fibers", IEEE SENS J, vol. 12, no. 1-2, January 2012 (2012-01-01), pages 189 - 194
SONG KWANG YONG ET AL.: "All-optical dynamic grating generation based on Brillouin scattering in polarization-maintaining fiber", OPT LETT, vol. 33, no. 9, pages 926
SONG KWANG YONG ET AL.: "All-optical dynamic grating generation based on Brillouin scattering in polarization-maintaining fiber", OPT LETT, vol. 33, no. 9, pages 926
Attorney, Agent or Firm:
SHIMOSAKA, NAOKI (JP)
Naoki Shimosaka (JP)
Naoki Shimosaka (JP)
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