Symmetric reconfigurable capacity assignment in a bidirectional DWDM access network

Abstract

This paper presents a novel architecture for DWDM bidirectional access networks providing symmetric dynamic capacity allocation for both downlink and uplink signals. A foldback arrayed waveguide grating incorporating an optical switch enables the experimental demonstration of flexible assignment of multiservice capacity. Different analog and digital services, such as CATV, 10 GHz-tone, 155Mb/s PRBS and UMTS signals have been transmitted in order to successfully test the system performance under different scenarios of total capacity distribution from the Central Station to different Base Stations with two reconfigurable extra channels for each down and upstream direction.

Photonic Crystal Based 2/3/6- Way Optical Splitter and Demultiplexer

“…Planar architectures offer compact in-plane circuits that can help miniaturize the photonic devices. While for classical communication, devices with fine channel separation are interesting [1][2][3][4], these can also have applications in quantum information processing when few photon level responses are achieved [5][6][7][8][9][10]. Photonic crystal (PC) based planar designs offer integrated chip architectures in which by employing non-linear optical materials, one can achieve ultrafast active control and novel functionalities [11].…”

WDM Optical Access Network for Full-Duplex and Reconfigurable Capacity Assignment Based on PolMUX Technique

“…To address these limitations, the dynamical capacity reconfiguration is an advanced strategy that provides an efficient sharing of the available bandwidth resources avoiding any waste of capacity in case of fluctuations of the traffic loads. The use of flexible wavelength routers to dynamically assign a different number of WDM channels depending on the actual ONUs demand has been previously proposed in [5][6][7][8][9]. However, in most cases, either a large and costly number of components or limitations to the ONUs upgrading may render feasibility and scalability a rather complicated and costly task.…”

Simultaneous transmission of 20x2 WDM/SCM-QKD and 4 bidirectional classical channels over a PON

“…Also, the quantum channels and reference channel transmitters which are separately sent to a remote node (RN) where they are combined with a classical DWDM multiplexer. Note that all optical sources are located in the CN to permit a reduction of the system complexity [10].…”