Chaoqin Gan

A novel architecture of reconfigurable WDM/TDM-PON

A novel architecture of hybrid WDM/TDM-PON based on a dual-fiber ring with access-tree topology is proposed. This system can enable the network operator to easily and flexibly reconfigure wavelength resources in the light of dynamical traffic load and bandwidth requirement by using a ROADM based on WB technology at each RN. Simultaneously, this scheme is able to improve reconfiguration of network in response to the failure of some fiber by utilizing a backup feeder-fiber ring and some optical switches.

An Architecture of Wavelength-Utilizing Rate Doubled WDM-PON

We proposed a novel architecture of WDM-PON based on the wavelength-lock light source. The wavelength utilizing rate was doubled by using an novel remote node (RN). The ORL induced by ASE was eliminated.

40 Gbps ultra long span unrepeatered system with large dispersion tolerance

A 40 Gbps ultra long span unrepeatered system is proposed. In the scheme, total effective capacity (40 Gbps) of the system is inverse multiplexed into 12 channels by digital signal processing. The bit rate of each channel is 10 Gbps. Principle of operation is clarified and experiment is performed without dispersion compensation. Results indicate that the proposed system can tolerate distortion caused by chromatic dispersion effectively after long distance transmission. The proposed system is applicable for ultra long single span transmission.

Study on Dynamic Wavelength Assignment in Condition of Finite ONUs Based on Priority Rotation in WDM-PON

We propose a novel WDM-PON architecture to realize dynamic wavelength assignment. Finite ONUs waiting model based on priority-rotation algorithm is applied to the system in order to evaluate network performance.