Japanese scientists have designed a new type of distributed feedback (DFB) laser, and have demonstrated it’s ability to transmit data at speeds of 200 Gb/s over a record distance of 10km.

The research will be presented at the Optical Fiber Communication Conference taking place March 5–9 2023 in San Diego, California, U.S.

https://techxplore.com/news/2023-01-laser-lays-groundwork-next-generation-ethernet.html