Cryogenic Oxide-VCSELs with Bandwidth over 50 GHz at 82 K for Next-Gen High-Speed Computing

A Cryo-VCSEL with f -3db > 50 GHz has been demonstrated at 82 K. Preliminary 44-Gb/s NRZ and 51.5625-Gb/s PAM-4 transmission for an optical data link from cryogenic environment to room temperature with a packaged 50-GHz oxide-VCSEL at 77 K are reported.