Partners demo 200G multimode VCSEL

Keysight and Coherent showcased 200G-per-lane VCSEL technology at OFC 2025, demonstrating characterization, tuning, and validation. The multimode VCSEL enables higher data transfer rates to meet growing data center bandwidth demands.

Keysight’s M8199B 256-Gsample/s AWG

The 200G multimode VCSEL enhances data transfer and network efficiency by doubling data throughput to 200 Gbps per lane, surpassing current multimode interconnects. It offers significant power savings per bit compared to single-mode alternatives, and its lower manufacturing costs make it a more economical choice for short-reach data links. Well-suited for AI pods and clusters, this VCSEL supports the high-speed, short-reach interconnects essential for GPU-driven data sharing.

The setup used at OFC featured Keysight’s DCA-M wideband multimode sampling oscilloscope, M8199B 256-Gsample/s arbitrary waveform generator (AWG), and Coherent’s 200G VCSEL. The AWG drives a 106.25-GBaud PAM4 signal into the VCSEL, with the optical output measured on the oscilloscope to display the eye diagram. This demonstrates the VCSEL’s feasibility and Keysight’s characterization and validation capabilities.

Keysight Technologies 

Coherent

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