Transparent optical networks are capable of providing a flexible and dynamic data transport via transparency regarding both data rate and format of transmitted signals achieved by implementing data transmission and forwarding in the optical domain. While supporting all-optical end-to-end paths, transparent optical networks are in principle suitable to integrate end-to-end quantum cryptography. ...

Optical fiber communication has brought us a new Internet society. In Japan, FTTH (Fiber to the Home) networks, in which optical fibers are installed directly to users’ homes, have been so popular that the number of contractors for FTTH service has exceeded fifteen millions as of May 2010. “Optical fiber,” “light source,” and “photo detector” are said to be three key elements of optical fiber c...

As concerns about energy consumption grow, the power consumption of the EPON becomes a matter of increasing importance in the heterogeneous networks. In respect of energy efficiency, the current standard has no management protocols aiming to reduce power consumption in EPONs. To increase energy efficiency while satisfying diverse QoS requirements, the sleep mode operation is introduced in an Op...

Fiber access network architectures such as active optical networks (AONs) and passive optical networks (PONs) have been developed to support the growing bandwidth demand. Whereas particularly Swedish operators prefer AON, this may not be the case for operators in other countries. The choice depends on a combination of technical requirements, practical constraints, business models, and cost. Due...

Flexible and scalable networking solutions are required to offer more efficient bandwidth allocation and increased connectivity in submarine networks. In this regard, filterless optical networks based on agile edge nodes equipped with coherent transceivers and passive broadcast-and-select nodes are promising cost-effective options which allow for more flexible capacity allocation and resource o...

Optical communication technology has been developed rapidly to achieve larger transmission capacity and longer transmission distance. In this paper we demonstrated optical time division multiplexing extended reach 10 Gb/s passive optical network (PON) architecture of 100 km length with 1:128 split ratio. The 100 km system is enabled by the use of corning nexcore fiber and corning SMF-28 fiber w...

In the very last years, optical access networks are growing very rapidly, from both the network operators and the research interests points of view. Fiber To The Home (FTTH) is already a reality in plenty of real contexts and there has been a further stimulus to the proposal of new solutions and the investigation of new possibilities, in order to optimize network performance and reduce capital ...