Method and device for measuring polarisation state and...

Details Method and device for measuring polarisation state and... Method and device for measuring polarisation state and...

G - Physics

01

M

G01M 11/02 (2006.01) G01J 4/00 (2006.01) H04B 10/08 (2006.01)

Patent

CA 2600029

The invention relates to a method and device for the evaluation of the specific values of the polarisation state of a signal transmitted within a photonic transmission system for a number of frequencies of one or more pulses extracted from the optical signal with the translation of the frequency components of the polarisation state of one or more pulses to the time domain through the use of an optical Fourier transformer, as well as for sampling, quantification and subsequent analysis. The aforementioned analysis is used to calculate the variation in the polarisation state in relation to frequency, the associated PMD vector and the DGD present in the transmitted signal. Said information can be used as a control signal for a PMD compensating device in order to improve the communication quality in the system.

Un procédé et un dispositif aptes à évaluer les valeurs spécifiques de l'état de polarisation du signal émis dans un système de transmission photonique pour un certain nombre de fréquences d'une ou de certaines impulsions extraites du signal optique au moyen de la traduction des composants de fréquence de l'état de polarisation d'une ou plusieurs impulsions vers le domaine temporel, en utilisant un transformateur de Fourier optique. Par la suite on échantillonne, quantifie et analyse le signal. On calcule à partir de l'analyse la variation de l'état de polarisation par rapport à la fréquence, à son vecteur de PMD associé et à la DGD présente dans le signal émis. Cette information peut être utilisée comme signal de commande d'un dispositif de compensation de PMD dans le but d'améliorer la qualité de la communication dans le système.

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