Method and apparatus for measuring frequency-resolved states...

H - Electricity – 04 – B

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H04B 10/08 (2006.01) G01J 4/00 (2006.01) H04B 10/148 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2504442

An apparatus for measuring a set of frequency-resolved states of polarization (SOP) of an optical signal includes a local oscillator (LO), a polarization scrambler, a coupler for mixing the polarization-scrambled signal with the optical signal to produce a heterodyned signal with a radio frequency (RF) component, and an analyzer for passing a fixed polarization component and resolving the polarization and frequency from the RF component. The apparatus is used for measuring, monitoring or compensating the polarization mode dispersion (PMD) in a working channel of an optical telecommunication system. A method for measuring frequency-resolved SOP of an optical signal includes tuning and polarization-scrambling a local oscillator (LO), mixing the scrambled LO with the optical signal, and resolving the RF signal in frequency and polarization. The method is applied to measure and monitor PMD in a working optical channel, and to dynamically compensate for the PMD.

Un dispositif de mesure d'une série d'états de polarisation à résolution de fréquence (SOP) d'un signal optique comprend un oscillateur local (LO ), un embrouilleur de polarisation, un coupleur pour mélanger le signal à brouillage par polarisation avec le signal optique afin de produire un signal hétérodyne avec un composant de fréquence radio (RF), et un analyseur permettant de faire passer un composant de polarisation fixe et la polarisation et de résoudre la polarisation et la fréquence provenant du composant RF. Le dispositif sert à mesurer, à surveiller ou à compenser la dispersion de polarisation de mode (PMD) dans un canal en fonctionnement d'un système de télécommunication optique. Une méthode de mesure des SOP à résolution de fréquence d'un signal optique consiste à synthoniser et à embrouiller par polarisation un oscillateur local (LO), à mélanger le LO à brouillage avec le signal optique, et à régler le signal RF en matière de fréquence et de polarisation. La méthode est appliquée pour mesurer et surveiller la PMD dans un canal optique en fonctionnement et pour compenser dynamiquement la PMD.

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