Optical Transceiver Testing Using Bench Power Supplies
應用說明
As AI workloads and hyperscale data centers drive the adoption of 800G and 1.6T optical transceivers, ensuring stable and noise-free power delivery has become critical for accurate high-speed testing. This application note explores the growing challenges of powering modern optical modules, including Power-Supply-Induced Jitter (PSIJ), transient current spikes, thermal stress, and signal integrity degradation associated with PAM4 signaling. It explains how advanced bench power supplies with ultra-low ripple, fast transient response, remote sensing, and integrated protection features help engineers isolate true transceiver performance from power-related artifacts. The note also presents a practical four-channel power methodology for separating sensitive DSP and laser circuits from noisy auxiliary loads, enabling more reliable characterization and validation. By leveraging Keysight’s programmable bench power supplies, engineers can improve measurement accuracy, reduce troubleshooting complexity, protect high-value prototypes, and build scalable test environments for next-generation optical networking technologies.