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We designed a Reconfigurable Optical Add/Drop Multiplexer (ROADM) based on a sub carrier add/drop node in an optical communication system that is suitable for all kinds of optical multiplexing signals. To achieve this goal, at first, we designed an optical comb generator based on a dual-drive Mach Zehnder. The new ROADM setup is validated by a 100 Gb/s 4-sub carrier. In the final step, we checked the performance of the system in terms of the bit error rate (BER) versus optical signal-to-noise ratio (OSNR) to verify the add/drop operation had been successfully performed at 10&#x2013;<sup>9</sup> and is suitable to apply in an all-optical multiplexing technique.

Implementation of an Elastic Reconfigurable Optical Add/Drop Multiplexer based on Subcarriers for Application in Optical Multichannel Networks