We expect 1600G to be an area to watch at OFC 2025. The Optical Internetworking Forum (OIF) has continued to play a key role in achieving industry consensus to promote coherent transmission interoperability. Although 800G coherent pluggables that address both OIF 800ZR and 800G ZR+ based on interoperable probabilistic constellation shaping (PCS) defined in OpenROADM have only recently been announced, the OIF has already made progress towards interoperable 1600ZR and 1600ZR+ implementation agreements.
Every new generation of speeds-and-feeds encounters challenges around industry consensus and technology achievements that push the envelope – and 1600ZR/ZR+ is no different. There is currently great momentum driving these efforts forward, especially in anticipation of advances in generative AI that are pushing optical interconnect needs to higher bandwidths. Evidence of this momentum is apparent by other industry efforts beyond the OIF that are currently active. In addition to the OIF 1600ZR/ZR+ efforts, the IEEE has also begun working on 1.6TbE electrical and optical interface standards within the IEEE 802.3dj working group, anticipated to be ready by the second half of 2026.
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