DCON26_PAPER_Track03_OptimizingHostOutputTP1aEqualizationSignalTuningforLinearOpticalLinksin106112GbLinearP_191_14.pdf

1、 Optimizing Host Output(TP1a)Equalization and Signal Tuning for Linear Optical Links in 106/112 Gb Linear Pluggable Optics Systems Hsinho Wu,Altera Mike Li,Altera Masashi Shimanouchi,Altera John DiCosoloa,Altera Abstract The adoption of 106/112 Gb linear optical interfacescommonly referred to as LPO

2、(Linear Pluggable Optics)is rapidly growing in data center and AI/ML applications due to their reduced power and latency compared to DSP-based architectures.In these systems,host transmitter performance is critically evaluated at a standards-defined test point known as TP1a,which captures the electr

3、ical signal quality at the host output delivered to the optical module.Beyond compliance,TP1a serves as the focal point for tuning transmitter equalization and amplitude to optimize system-level Symbol/Bit Error Rate(SER/BER).This paper presents a TP1a-centered optimization approach that adjusts FIR

4、 equalizer tap weights and output swing in production-grade 106 Gb transmitters with 3 pre-taps and 4 post-taps.The method remains compatible with the 2-post-tap reference model in the OIF-CEI-112G-LINEAR specification.Using real-world host PCBs and LPO-compliant optical modules,we validate the algo

5、rithms impact on compliance metrics such as EECQ,VMA,and Ceeq,and investigate cross-vendor module sensitivities to input electrical swing.Our findings demonstrate that TP1a tuning plays a decisive role in achieving target SER/BER levels and ensuring robust LPO system performance,while laying the gro

6、undwork for 212/224 Gb link designs under development.Author(s)Biography Dr.Hsinho Wu is a Principal Engineer at Altera Corporation.He presently works on high-speed communication systems IPs.His development and research interests include signal integrity,clock and data recovery,equalizations,device