Enabling 400G per Lane Transceivers

The spike in transceiver demand for AI cluster and data center application is a consequence of the increased data traffic coming from the introduction of large language models (LLM) that power the life of ever more humans every day. Not only the numbers of transceivers sold is sharply increasing, but also their specs, essentially doubling every three years. With 3.2T transceiver sampling in 2027 and volume in 2028, Polariton offers enabling products and technology today.

• InfiniBand 1600G GDR (x4): implemented with 4x 400G per lane channels, 224 GBaud PAM4
• InfiniBand 3200G GDR (x4): implemented with 4x 800G per lane channels, 448 GBaud PAM4
• Ethernet 3.2TbE: implemented with 8x 400G per lane, 224 GBaud

While the industry is evaluating various electro-optic platforms, Polaritons enables customers today. At OFC 2025 we release new eye diagrams measured of ring resonator modulators measured with 1550 nm devices. O-band 1310 nm are on the way and can be sampled for customers as early as Q2/2025.

Reducing the number of lanes in transceivers improves yield, enhances reliability, and lowers power consumption. With a corner frequency of approximately 145 GHz, our ring resonator modulators (RRMs) support data rates beyond 200 GBaud PAM4 — exceeding 400G per lane.

Our Key Enabling Product

• RR4-C145: 145 GHz 4-Channel Ring Resonator Modulator, available for 1310 and 1550 nm

Related papers:
T. Blatter, Plasmonic Ring Resonator Modulator Demonstrating IM/DD >400G per lane (ECOC 2024)
M. Eppenberger, et al, Resonant plasmonic micro-racetrack modulators with high bandwidth and high temperature tolerance (Nature Photonics, 2023)

Read more: Knowledge Center