No abstract

Fiber-to-the-home (FTTH) networks are seen as the most future-proof technology to offer increasing bandwidth to customers. By utilizing passive optical network (PON) technology, they provide flexibility and capability to carry higher bandwidths as compared to the legacy copper-based access network. Optical performance monitoring could potentially enable higher stability, reconfigurability, and flexibility in a self-managed optical network. This paper will describe the specific fiber impairments that affect the quality of service for fiber-to-the-home networks. The impairment needs to be monitored and restored. The proposed solution will utilize a photodiode and optical switch as the main components, can easily be integrated with the ONU through the optical interface, and will be referred to as ‘PROMO’. With this scheme, the protection and restoration mechanisms are archived through the detection and availability of the downstream signal from the OLT. The results show that the received power, BER values, and maximum Q factor are acceptable for both simulation and experimental conditions in the case of normal and protection conditions.

No abstract

The evolution of access network technology utilizing Passive Optical Network (PON) has provided a means for high speed broadband to be effectively implemented in Malaysia through FTTH technology. As the bandwidth demand and number of subscribers is increasing, WDM-PON is considered the best candidate for future deployment. On the same note, this paper presents the development of tunable 16 channels WDM-PON system, focusing on the colourless ONU's uplink signal transmission. This system is utilizing a software controlled tunable transceiver in both OLT and ONU, thus would enable colourless mode of operation. A 16 channels wavelength plan has also been defined for the upstream and downstream communication. Besides that, an athermal AWG is introduced in the network for wavelengths multi/demultiplexing operation. An experimental setup has been made to simulate an optical modulated upstream signal from the colourless ONU to the OLT. The resulting upstream signals will be analyzed and characterized based on the availability, distance, optical received power as well as its quality on BER and the eye diagram. The results show that the ability of the developed tunable WDM-PON system to operate at 2.5Gbps for the upstream transmission and should be able to support the future plan of WDM-PON deployment in Malaysia.