Coherent announcements and roadmaps at the show focused on two themes: lowering the power of coherent technology for use in pluggable applications and increasing baud rates to raise the maximum capacity of a single wavelength beyond 600Gbps. Every coherent component announcement concerned either 400ZR or beyond 600Gbps operation. And despite few new ROADM announcements, there was a spirited debate about future ROADM architectures.
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