White Papers

Coherent DWDM Technologies


Network bandwidth is growing at staggering rates estimated to approximate 40% growth year over year driven by cloud, mobile, and video. Techniques to increase optical bandwidth cost efficiently through Dense Wave Division Multiplexing (DWDM) have begun to get more complex and therefore more technically challenging to implement. This paper reviews the progress and techniques used to increase optical channel capacity from 2.5G to 100G and beyond with a particular focus on coherent transmission technologies, and stresses the importance of practical and robust implementations that deliver costeffective and highly reliable optical transport.