NTT nd Oki Electric Industry Co. have jointly developed a WDM/TDM-PON technology capable of transmission at 40 Gbps over a 40km distance while servicing 1,024 users.
The jointly developed WDM/TDM-PON technology consists of (1) wavelength-tunable burst-mode optical transceivers, (2) a wavelength multiplexed burst-mode optical amplifier and (3) a wavelength tuning protocol. Each Optical Network Unit (ONU) on the customer premises communicates at one of four pre-determined wavelengths. Two types of wavelength-tunable burst-mode optical transceiver have been developed in this project. Each wavelength carries 10 Gbps. A wavelength tuning protocol has been developed that allows for the switching of the ONU’s wavelength to any one of the other three wavelengths at which there is less traffic.
