Cascaded modulator architecture for WDM applications
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Integration density, channel scalability, low switching energy and low insertion loss are the major prerequisites for on-chip WDM systems. A number of device geometries have already been demonstrated that fulfill these criteria, at least in part, but combining all of the requirements is still a difficult challenge. Here, we propose and demonstrate a novel architecture consisting of an array of photonic crystal modulators connected by a dielectric bus waveguide. The device architecture features very high scalability and the modulators operate with an AC energy consumption of less than 1fJ/bit. Furthermore, we demonstrate cascadeability and multichannel operation by using a comb laser as the source that simultaneously drives 5 channels.
Debnath , K , O'Faolain , L , Gardes , F Y , Steffan , A G , Reed , G T & Krauss , T F 2012 , ' Cascaded modulator architecture for WDM applications ' , Optics Express , vol. 20 , no. 25 , pp. 27420-27428 . https://doi.org/10.1364/OE.20.027420
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