Optics: measuring and testing – Material strain analysis – By light interference detector
Reexamination Certificate
2007-04-16
2009-08-18
Connolly, Patrick J (Department: 2877)
Optics: measuring and testing
Material strain analysis
By light interference detector
C356S073100, C356S477000, C385S012000
Reexamination Certificate
active
07576840
ABSTRACT:
The present invention relates to a Brillouin spectrum measuring method and measuring apparatus that have a structure for more accurately measuring the parameters of Brillouin spectra at predetermined sections of an optical fiber. The measuring method comprises an optical fiber section including first and second optical fibers that are serially connected via a connection portion. The first and second optical fibers have a Brillouin spectrum for which the difference between the peak frequencies in a predetermined temperature and predetermined strain-applied state for which the respective usage environments are assumed is equal to or more than a predetermined frequency difference. In the measuring method, a Brillouin spectrum which is obtained in accordance with pumping light supplied to the optical fiber section is measured, and a point of connection between the first and second optical fibers is specified on the basis of the measurement data for the measured Brillouin spectrum.
REFERENCES:
patent: 5592577 (1997-01-01), Tanoue
patent: 7283216 (2007-10-01), Geng et al.
patent: 2004/0206893 (2004-10-01), Sato
patent: 2005/0207752 (2005-09-01), Kwon et al.
patent: 2006/0109451 (2006-05-01), Lopez Torres et al.
patent: 2008/0013096 (2008-01-01), Bernini et al.
patent: 2008/0068586 (2008-03-01), Kishida et al.
patent: 2008/0193126 (2008-08-01), Yamamoto
patent: 08-125607 (1996-05-01), None
patent: 11-142293 (1999-05-01), None
patent: 11-287670 (1999-10-01), None
patent: 2004-317436 (2004-11-01), None
Nikles et al., “Brillouin Gain Spectrum Characterization in Single-Mode Optical Fibers”, Journal of Lightwave Technology, Oct. 1997, p. 1842-1851, vol. 15, No. 10.
L. Thevenaz et al., “Brillouin gain spectrum characterization in optical fibres from 1 to 1000 K”, OFS-16, Tu2-2, p. 38-41, 2003.
Kazuo Hotate et al., “Measurement of Brillouin Gain Spectrum Distribution along an Optical Fiber Using a Correlation-Based Technique-Proposal, Experiment amd Simulation-”, IEICE Trans Electron, Mar. 2000, p. 405-412, vol. E83-C. No. 3.
Connolly Patrick J
Global IP Counselors, LLP
Sumitomo Electric Industries Ltd.
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