Hopefully someone can explain the difference to me please. I found some links as I was poking around on North American Network suppliers. Here is the link  https://techblog.comsoc.org/2017/08/28/top-optical-network-equipment-vendors-data-center-interconnect-overall-market/

  Ciena, Cisco and Infinera together command 85% of the disaggregated wavelength-that 85%division multiplexing field for DCI optical network equipment market segment, Dell’Oro Group estimates.

Then I looked up Ciena and its seems they had a new product out February of last year. Here is the link for that one as well.

https://www.ciena.com/insights/articles/Ciena-unveils-WaveLogic-5-800G-and-so-much-more.html

Appreciate any insight.

Thank you

Don