Optics: measuring and testing – For optical fiber or waveguide inspection
Reexamination Certificate
2008-02-12
2011-12-13
Nguyen, Tu (Department: 2886)
Optics: measuring and testing
For optical fiber or waveguide inspection
Reexamination Certificate
active
08077299
ABSTRACT:
The present invention relates to a measuring method, etc., comprising a structure for accurately measuring optical characteristics such as PMD of an optical fiber. The measuring method is a technique for measuring polarization characteristic distributions along the longitudinal direction of the optical fiber as a measuring object by using BOCDA, and by propagating probe light and pumping light opposite in the optical fiber, BGS is generated at a plurality of respective measurement positions. Then, based on Brillouin gain fluctuations at the respective measurement positions, polarization characteristic distributions are calculated.
REFERENCES:
patent: 4997277 (1991-03-01), Horiguchi et al.
patent: RE34972 (1995-06-01), Horiguchi et al.
patent: 6724469 (2004-04-01), Leblanc
patent: 2008/0068586 (2008-03-01), Kishida et al.
patent: 2-006725 (1990-01-01), None
patent: 5-284110 (1993-10-01), None
patent: 10-160625 (1998-06-01), None
patent: 2000-180265 (2000-06-01), None
patent: 3667132 (2005-07-01), None
patent: 2007-155409 (2007-06-01), None
Torsten Gogolla et al., “Distributed Beat Length Measurement in Single-Mode Optical Fibers Using Stimulated Brillouin-Scattering and Frequency-Domain Analysis,” Journal of Lightware Technology, vol. 18, No. 3, Mar. 2000, pp. 320-328.
William H. Press et al., “Numerical Recipes in C: The Art of Scientific Computing, Second Edition,” Cambridge University Press, Chapter 12, 1992.
Yoshinori Yamamoto, “Distributed Birefringence Measurement in Optical Fibers Using Stimulated Brillouin Scattering,” Proceedings of the IEICE Conference, 2007 Tsushin 2, Mar. 2007, p. 530, with English Translation.
Chinese Office Action, with English translation, issued in Chinese Patent Application No. 200880007343.3, mailed Aug. 25, 2010.
Hu, X-D, et al., “A Distributed Optical Fiber Single-end Sensing Technique Based on Brillouin Gain”, Journal of Optoelectronics Laser, pp. 86-88, vol. 11 No. 1.
English translation of the International Preliminary Report on Patentability issued in application No. PCT/JP2008/052256 dated Oct. 8, 2009.
Japanese Office Action, with English translation, issued in Japanese Patent Application No. 2007055738, dated Oct. 11, 2011.
Sasaoka Eisuke
Yamamoto Yoshinori
McDermott Will & Emery LLP
Nguyen Tu
Sumitomo Electric Industries Ltd.
LandOfFree
Method for measuring polarization characteristics of optical... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for measuring polarization characteristics of optical..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for measuring polarization characteristics of optical... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4310287