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
O/C Band 145 GHz Probable 4-Channel Ring Resonator Modulator
The RR4-C145 delivers >145 GHz bandwidth, reducing power consumption and enhancing signal integrity for high-speed transceivers. Its compact, efficient design enables seamless integration and scalability.
The RR4-C145 is an advanced 4-channel ring resonator modulator designed for high-speed optical communication applications. Operating in both O-band (1310 nm) and C-band (1550 nm), this modulator delivers a 3-dB electro-optical bandwidth exceeding 145 GHz, making it a key enabler for next-generation transceivers and data transmission at 200 GBaud PAM4.
With a lumped, low-capacitance RF design, the RR4-C145 offers superior performance with an insertion loss below 6 dB, a static extinction ratio greater than 8 dB, and an ultra-low Vdrive of less than 1 V @ 50 Ohm.
The compact chip integrates RF and DC interfaces on the same edge, ensuring ease of integration into high-speed systems. Engineered for probing with GSG probes for GS operation, the RR4-C145 supports optical input power up to 13 dBm and operates reliably between -40°C and 85°C, ensuring long-term stability with 8000 hours of operation at 20°C with minimal Vdrive degradation.
Also available as a single-channel configuration, the RR4-C145 provides unmatched flexibility for a wide range of optical interconnect solutions.
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