Judge's comment: "Viavi's spectral correlation measurement method is truly innovative. It solves a very challenging problem: non-disruptive in-band measurement of OSNR in a modern ROADM-based coherent transmission system. This is a meaningful advancement to the optical measurement field and will be highly valuable to the network operators."
The OSA-710 is the first instrument to be able to measure in-band OSNR on live, coherent systems that use polarization-multiplexed (Pol-Mux) transmission formats. It's also the first instrument to measure in-service chromatic dispersion on high-speed network traffic containing Pol-Mux signals, Viavi adds.The OSA-710 uses a new, non-intrusive Spectral Correlation Method (SCorM) (Viavi patent US 20160164599 A1) to enable in-service and in-band OSNR measurements. The method is