New Internet business developed rapidly

make the network traffic increase sharply

driving the demand for optical communication capacity.At the same time

New Internet applications demand for bandwidth is unpredictability.These two factors drive optical network development in the direction of flexible

dynamic and efficient.Variable bandwidth optical networks can be according to the transmission distance

link quality and business demand dynamically to adjust the transmission rate

modulation format to match the network actual demand

improve the flexibility and network survivability.Key technologies of variable bandwidth optical networks include variable bandwidth reconfigurable optical add/drop multiplexer

variable bandwidth transceiver technology

variable bandwidth electric layer technologies and variable bandwidth control layer technologies.