Method and apparatus for measuring polarization-mode dispersion

G - Physics – 01 – M

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G01M 11/02 (2006.01)

Patent

CA 2466850

Polarization-mode dispersion (PMD) of an optical device, i.e. fiber or component is effected by launching a first pump laser beam of a fixed wavelength, a probe laser beam with a second fixed wavelength and a second pump laser beam having a variable wavelength and a polarization direction orthogonal to the other two beams into an optical device to generate three output signals which are input into a semiconductor optical amplifier to generate flour-wave mixing (FWM) products. The average PMD of the device is computed by measuring the power of the FWM products versus the wavelength of the second pump laser beam.

La dispersion modale de polarisation d'un dispositif optique, c.-à-d. fibre ou composant, est effectuée en lançant un premier faisceau de pompage d'une longueur d'onde fixe, un faisceau de sondage avec une deuxième longueur d'onde fixe et un deuxième faisceau de pompage doté d'une longueur d'onde variable et d'un direction de polarisation orthogonale par rapport aux deux autres faisceaux dans un dispositif optique pour générer trois signaux de sortie qui sont entrés dans un amplificateur optique à semi-conducteurs pour générer des produits de mélange à quatre ondes (FWM). La dispersion modale de polarisation moyenne du dispositif est calculée en mesurant la puissance des produits FWM par rapport à la longueur d'onde du deuxième faisceau de pompage.

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