BB those numbers POET posted for TDECQ are in fact excellent and that is from a pre-production optical engine. Scroll down to the bottom of the Arista page and you will see a clip providing 400G FR4 optical measurements.  Time 1:00 https://www.fs.com/products/110527.html?attribute=25656&id=816473

TDECQ:1.74dB shows excellent signal quality.  

As Jamie said the goal is to meet the standards and do it with all the additional benefits offered by POET.

"POET is one of the handful of game changing companies"

It was great to see someone in the business and one of Suresh's past colleagues pay tribute to this accomplishment. 

And very much agree with Rainer that combining the Rx and TX on one optical interposer is the end goal. But again Suresh will limit change requirements (cost) by bringing the TX and RX through qualification as separate optical engines.