Polarized lightwave reflectometry method (POTDR)

Details Polarized lightwave reflectometry method (POTDR) Polarized lightwave reflectometry method (POTDR)

2008-04-22

2008-04-22

Nguyen, Tu T (Department: 2886)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

07362427

ABSTRACT:
A polarized lightwave reflectometry method including the steps of sending at least two polarized light signals into the optical fiber to be tested, the signals presenting a determined angular offset relative to each other so that the polarization mode dispersion coefficient remains independent of any rotation of polarization in the optical fiber under test; extracting a scalar parameter of the relative noise type for each trace obtained by back-scattering of the light signal; and estimating the polarization mode dispersion coefficient by a function having a single scalar input, which function is of the type based on exponentials and has the form exp (a+bP+cP−1).

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“PMD Measurement With a Polarization-OTDR”; Wuipart, et al.; XP-001158413; Sep. 12, 2002.
“Distributed PMD Measurement With a Polarization-OTDR in Optical Fibers”; Hunters, et al.; p. 1843-1848; IEEE, 1999.
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Patent Abstracts of Japan; 2002048680; Aug. 1, 2000; Takeshi.
A Galtarossa et al., “Single-End Polarization Mode Dispersion Measurement Using Backreflected Spectra Through a Linear Polarizer”, Journal of Lightwave Technology, IEEE, NY, US vol. 17, No. 10, Oct. 1999 pp. 1835-1842, XP000984134.
A. Galtarossa, Polarization-Sensitive Reflectometric Techniques for PMD Measurements, XP-001035400, 25thEuropean Conference on Optical Communication. (ECOC '99). Nice, France Sep. 27-30, 1999, Sep. 26, 1999.

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