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The Roadm Challenge and the in-Band OSNR Solution

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The Roadm Challenge and the in-Band OSNR Solution

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  • Author: Francis Audit, Daniel Gariepy
Many high-bandwidth networks are currently being upgraded to include reconfigurable optical add/drop multiplexers (ROADMs) in order to improve efficiency and flexibility. Networks using ROADMs are somewhat different from standard systems: a simple glitch on a live network operating at many wavelengths and at high data rate can cause the system to lose a considerable amount of data, gravely affecting not only overall quality of service (QoS) but costs as well, thus accentuating the importance of accurate measurement of optical signal-to-noise ratio (OSNR).

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