Single sweep polarization dependent loss measurement

Details Single sweep polarization dependent loss measurement Single sweep polarization dependent loss measurement

2005-02-15

2005-02-15

Nguyen, Tu T. (Department: 2877)

Optics: measuring and testing

For optical fiber or waveguide inspection

Reexamination Certificate

active

06856386

ABSTRACT:
A polarization scan module is presented. The polarization scan module according to some embodiments of the present invention includes a swept-wavelength optical source providing a light signal that sweeps over a range of optical wavelengths, the light signal having a state of polarization; and a polarization rotator that rotates the state of polarization over a Poincare sphere as the light signal wavelength is swept within the range to produce a test optical signal. A single sweep polarization dependent loss measurement can be achieved with some embodiments of the present invention. In some embodiments, measurements of the state of polarization and optical power at the input and output of an optical component being tested together with the known optical wavelength for the state of polarization, taken at four different polarizations, can provide a set of measurement data that can be used to compute the polarization dependent loss.

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Egbert Krause, Jens Peupelmann, Adalbert Bandemer, Christian Schaffer, “IMHz High Speed Fiber-Inline-Polarimeter”, 28thEuropean Conference on Optical Communication Sep. 12, 2002.
Craig, R. M. “Accurate Spectral Characterization of Polarization-Dependent Loss,”Journal of Lightwave Technology, vol. 21, No. 2, pp. 432-437 (Feb. 2003).

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