Optics: measuring and testing – For optical fiber or waveguide inspection
Reexamination Certificate
2007-02-20
2007-02-20
Nguyen, Tu T. (Department: 2877)
Optics: measuring and testing
For optical fiber or waveguide inspection
Reexamination Certificate
active
10863883
ABSTRACT:
An apparatus and method for accurate measurement of characteristics of optical fibers (distribution of polarization mode dispersion and distribution of magnitude of birefringence). Pulse light is inputted to a subject optical fiber, back scattered light of the pulse light from the subject optical fiber is detected by a photodetector to find a Stokes vector, and polarization mode dispersion in a longitudinal direction is measured. The apparatus comprises a light source unit for outputting the pulse light having at least three different angular frequencies, and an arithmetic operation unit for calculating the magnitude of linear polarization components and the magnitude of a circular polarization component of a polarization dispersion vector on the basis of the Stokes vector and thus calculating polarization mode dispersion.
REFERENCES:
patent: 5965874 (1999-10-01), Aso et al.
patent: 6385357 (2002-05-01), Jopson et al.
patent: 6462863 (2002-10-01), Atieh et al.
patent: 2003-106942 (2003-04-01), None
patent: WO 98/36256 (1998-08-01), None
Corsi et al., “Beat length characterization based on backscattering analysis in randomly perturbed single-mode fibers,” Journal of Lightwave Technology (U.S.), Laser & Electro-Optics Society (LEOS) 17(7):1172-1178 (1999).
Corsi et al., “Polarization mode dispersion characterization of single-mode optical fiber using backscattering technique,” Journal of Lightwave Technology (U..S.), Laser & Electro-Optics Society (LEOS) 16(10):1832-1843 (1998).
Foschini et al., “Statistical theory of polarization dispersion in single mode fibers,” Journal of Lightwave Technology, (U.S.), Laser & Electro-Optics Society (LEOS), 9(11):1439-1456 (1991).
Rogers, “Polarization optical time domain reflectometry,” Electronics letters (U.K.), the Institution of Electrical Engineers (IEE) 16(13):489-490 (1980).
Ross, “Birefringence measurement in optical fibers by polarization-optical time-domain reflectometry,” Applied Optics (U.S.), Optical Society of America (OSA) 21(19):3489-3495, (1982).
Aoki Shouichi
Fujiwara Emiko
Yano Tetsuo
Ando Electric Co. Ltd.
Nguyen Tu T.
Yokogawa Electric Corporation
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