Tower Semiconductor and Coherent Achieve 400Gbps/lane Breakthrough in Silicon Photonics
Event summary
- Tower Semiconductor and Coherent demonstrated 400Gbps/lane data transmission using a silicon modulator in a production-ready silicon photonics (SiPho) process on March 23, 2026.
- The demonstration targeted next-generation 3.2T optical transceivers and utilized Coherent’s InP CW high power laser.
- The achievement was presented at the OFC conference, showing a clear open eye at 420 Gb/s PAM4.
- Tower Semiconductor CEO Russell Ellwanger highlighted the potential to extend silicon use for another generation of transceivers.
The big picture
This breakthrough underscores the critical role of silicon photonics in enabling high-speed data transmission for AI-driven datacenters. The collaboration between Tower Semiconductor and Coherent highlights the strategic importance of photonics in meeting the exponential growth in bandwidth demands. The demonstration positions Tower Semiconductor to leverage its existing multi-fab investments while advancing more advanced material systems for future generations.
What we're watching
- Market Adoption
- The pace at which this technology will be integrated into next-generation 3.2T optical transceivers and datacenter connections.
- Competitive Positioning
- Whether Tower Semiconductor can maintain its lead in silicon photonics amid growing demand for high-bandwidth solutions.
- Scalability
- How effectively Tower Semiconductor can scale its multi-fab capacity to meet the increasing bandwidth requirements of AI infrastructure.
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