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How to Perform in-Service Pol-Mux OSNR Measurements with your FTBx-5255 Optical Spectrum Analyzer

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How to Perform in-Service Pol-Mux OSNR Measurements with your FTBx-5255 Optical Spectrum Analyzer

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  • Author: Jean-Sébastien Tassé, Éric Dorion, Gang He, Michel Leclerc, Daniel Gariépy
This application note provides some background concerning state of the art OSNR measurement methods in today’s networks. First, we explain why classical OSNR measurement methods no longer constitute workable solutions. Then, we lay out EXFO’s in-service Pol-Mux OSNR method (see figure below) and explain how it is performed. Finally, we describe the conditions under which reference-based OSNR measurement is sound and how to generate valid reference trace measurements and keep them healthy.

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