Optics: measuring and testing – By light interference – Having polarization
Reexamination Certificate
2007-04-03
2009-10-13
Lyons, Michael A (Department: 2877)
Optics: measuring and testing
By light interference
Having polarization
C356S073100
Reexamination Certificate
active
07602499
ABSTRACT:
A device for measuring polarization mode dispersion (PMD) in a device under test (DUT) includes a polarized light source for launching a test beam through the DUT, and a PMD analyzer, which uses one of a plurality of known techniques, e.g. fixed analyzer-Fourier transform (FA-FT) or interferometric, to calculate the PMD from the DUT. A passive depolarizer, made up of a plurality of birefringent elements is disposed between the light source and the PMD analyzer to generate a plurality of carrier frequencies that correspond to the delays imposed by the birefringent elements. The PMD content of the DUT is present around each of the carriers, and the plurality of PMD measurements can be averaged to obtain a more accurate and repeatable measure of the PMD.
REFERENCES:
patent: 4198123 (1980-04-01), Kremen
patent: 5654793 (1997-08-01), Barlow et al.
patent: 6380533 (2002-04-01), Jopson et al.
patent: 6498869 (2002-12-01), Yao
patent: 6519027 (2003-02-01), Gordon et al.
patent: 6947129 (2005-09-01), Lu et al.
patent: 7212281 (2007-05-01), Tanigawa et al.
patent: 7227645 (2007-06-01), Cyr
patent: 7426021 (2008-09-01), Cyr
patent: WO02/077680 (2002-10-01), None
patent: WO/2004/025242 (2004-03-01), None
Gisin at al, “How accurately can one measure a statistical quantity like polarization-mode disperson”, IEEE Photonics Technology Ltrs 8, No. 12, p. 1671 (1996).
Oberson at al, “Interferometric PMD Measurements with Femtosecond sensitivity”, J. Lightwave Techno. 15, No. 10, 1997.
Acterna LLC
Lyons Michael A
Pequignot Matthew A.
Pequignot & Myers LLC
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