Abstract: In recent years, along with the rapid developments of the FTTH fixed broadband and 5Gmobile broadband services, both development chances and capacity challenges have been brought to the carrier’s optical networks of China. To cope with the rapidly growing network traffic, new optical network technology has been continuously developed. Here we discuss the developments and challenges ofROADM,open and disaggregation of optical network and 5G bearing networks.

Key words: optical networks, FTTH, ROADM, 5G bearing networks