Technology#07 in January 2026 EditionA 100-Gbps silicon photonics PAM-4 optical transmitter operating up to 105 °C without thermoelectric cooling
Daniel Kraemer, Sunita Rao, Philip Montgomery et al.
OPENSTEM EDITORIAL SUMMARY
What the research examines
Demonstrates a monolithic Mach-Zehnder optical transmitter integrated with high-speed CMOS driver circuits, achieving 100 Gbps PAM-4 transmission across single-mode optical fiber at 105 °C die temperature with bit error rates below the forward-error-correction threshold.
Why it may matter
Eliminates power-hungry thermoelectric coolers (TECs) in high-density co-packaged optics for AI server racks.
What to examine carefully
Thermo-optic phase drift requires on-chip thermal monitoring and digital adaptive bias control circuits.
Editorial scope: This is a concise, independently written introduction based on the publisher information, not a full systematic review or independent replication. It must not replace reading the original methods, limitations and conclusions.
STUDENT RESEARCH LENS · ORIGINAL OPENSTEM NOTES
Try a small, reproducible follow-up
Construct eye-diagram contours and compute transmitter dispersion eye closure quaternary (TDECQ) metrics in MATLAB.
Questions to investigate
- How was the optical modulation amplitude (OMA) stabilized across the 25 °C to 105 °C temperature swing?
- What total electrical power dissipation per bit was measured at maximum operating temperature?
These are independently proposed educational investigations, not activities that the original research authors claim to have completed.
Publication & researcher information
JournalIEEE Photonics Technology Letters
Published online2026-01-09
Authors (selected)Daniel Kraemer, Sunita Rao, Philip Montgomery et al.
University / laboratoryUniversity of California, Santa Barbara
CountryUnited States
Multi-author research may involve universities in several countries. Unverified institutions and contact addresses are not inferred from authors' names.