This will speed up fax transmission rates for sure!
Japan's NTT Corporation claims it has developed technologies that allow data transmission at 1.2Tbit/s per wavelength in an optical system. As today's commercial kit delivers 100Gbit/s per wavelength, this is quite a breakthrough. But wait, there's more: NTT reckons its tech reduces power consumption to less than 10 percent …
I was expecting there to be a catch in all this since NTT doesn't mention the ACTUAL distance record they broke, but after a bit of ducking (DDG) I find that the the distance record for 800Gbps was 970km in September 2020  and that has probably been surpassed since, so this new technology from NTT is definitely a significant advance - especially as it seems to be out of the R&D stage and looking for scaling into production.