Optical Transport Network

About: Optical Transport Network is a research topic. Over the lifetime, 6055 publications have been published within this topic receiving 85783 citations.

Transmission media for an SDM-based optical communication system

Abstract: Space-division multiplexing technology is an attractive candidate for overcoming a potential future “capacity crunch” in optical networks based on conventional single-mode fiber. Transmission media for SDM optical communication systems can be designed based on both single-and multi-core concepts. This article investigates the potential of various SDM transmission media.

Next-generation optical access networks for C-RAN

Abstract: This paper reviews the required specifications to optical fronthaul links for C-RAN and presents key technologies of optical transmissions and a CPRI data compression for next-generation optical access networks.

Optical data communications network with a plurality of optical transmitters and a common optical receiver connected via a passive optical network

Abstract: An optical data communications network, for example a TPON (telecommunications over passive optical networks) network, has a common optical receiver and a plurality of optical transmitters connected to the common optical receiver by a passive optical network which consists of optical splitters/combiners linked by lengths of an optical fibre. The optical signals produced respectively by the different optical transmitters are interleaved together in a predetermined time-division multiple access format and are modulated using a return-to-zero modulation format. The common optical receiver can operate satisfactorily at desirably-high bit rates despite wide variations in the power levels of the optical signals reaching the receiver from the different transmitters, which variations arise due to the different attenuations experienced by those signals as they propagate along optical fibre paths of different lengths containing different numbers of splitters/combiners. As a result, power levelling of the transmitters is not required.

All-optical wavelength conversion in optical multicarrier networks

Abstract: The authors analyze the use of all optical wavelength conversion in the optical layer of a high-capacity transport network and compare different technological solutions. The analysis is based on the evaluation of the transmission performance of a generic signal path through the network. At least two technologies have been discovered allowing the realization of all-optical wavelength converters suitable for use in the considered application, providing high performance. In particular, for networks covering long distances, wavelength conversion based on four-wave-mixing in semiconductor amplifiers seems to be a very interesting solution.

Optical transport networks

Abstract: The present invention provides an optical packet switch (3, 4) that facilitates efficient provisioning of packet services through a predominantly circuit-switched optical transport network infrastructure (1). In particular, the optical packet switch (3, 4) fits within a network where circuit and packet-switched traffic are transported together through the optical transport network (1). Fast switching is provided for packet traffic where granularity below the wavelength level is required, while slow wavelength switching and routing is facilitated at the same time. Fast switching and packet traffic aggregation for efficient bandwidth utilisation is performed at the edge where the optical transport network (1) interfaces with the IP domain (6), where dynamic and fast wavelength allocation for packet traffic is required.