H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 10/08 (2006.01)
Patent
CA 2761027
A method comprises : acquiring, for a number nSOP of varied State-Of-Polarization analysis conditions of the input optical sig-nal, nSOP polarization-analyzed optical spectrum traces, the distribution of said SOP analysis conditions being approximately known; mathemati-cally discriminating said signal contribution from said noise contribution within said optical signal bandwidth using said polarization-analyzed op-tical spectrum traces, said mathematically discriminating comprising : ob-taining a differential polarization response that is related to the optical spectrum of said signal contribution by a constant of proportionality; esti- mating the constant of proportionality of a differential polarization re-sponse to the optical spectrum of said signal contribution as a function of said number nSOP; estimating the optical spectrum of said noise contribu-tion from said input optical signal, within said optical signal bandwidth using said constant of proportionality and said differential polarization re- sponse; and determining said in-band noise parameter on said input opti-cal signal from the mathematically discriminated noise contribution.
L'invention porte sur un procédé comprenant : l'acquisition, pour un nombre nSOP de conditions d'analyse d'état de polarisation (SOP) variable du signal optique d'entrée, de nSOP traces de spectre optique à polarisation analysée, la répartition desdites conditions d'analyse SOP étant approximativement connue, la discrimination mathématique entre la contribution dudit signal et la contribution dudit bruit dans la largeur de bande dudit signal optique à l'aide desdites traces de spectre optique à polarisation analysée, ladite discrimination mathématique comprenant : l'obtention d'une réponse de polarisation différentielle liée au spectre optique de ladite contribution de signal par une constante de proportionnalité, l'estimation de la constante de proportionnalité d'une réponse de polarisation différentielle au spectre optique de ladite contribution de signal en fonction dudit nombre nSOP, l'estimation du spectre optique de ladite contribution de bruit à partir dudit signal optique d'entrée, dans ladite largeur de bande de signal optique à l'aide de ladite constante de proportionnalité et de ladite réponse de polarisation différentielle, et la détermination dudit paramètre de bruit dans la bande dudit signal optique d'entrée à partir de la contribution de bruit mathématiquement discriminée.
Cyr Normand
He Gang
Exfo Inc.
Norton Rose Canada S.e.n.c.r.l. S.r.l./llp
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