Promising candidates for filtering, packing, separating and managing large numbers of channels in a Dense Wavelength Division Multiplexing DWDM systems are the circuits based on ring resonators. Rings with Free Spectral Range FSR ranging from few GHz [1] up to some THz [2] have been demonstrated in various technologies, both passive and active. However, there are several constraints in using ri...

OBANET project aims at designing and testing specific coverage area management strategies as well as their associated technologies for performance optimisation in broadband adaptive broadband wireless access networks in two scenarios: fixed and mobile broadband radio accesses in the 40 GHz band. Optically beamformed base station antennas capabilities to address dynamically changes in the networ...

Arrayed waveguide gratings (AWGs) are one of the key components for dense wavelength division multiplexing (DWDM) systems enabling wavelength(de)multiplexing and routing scaling to a large number of channels with graceful increases in optical losses. AWGs are widely used in telecommunications, datacom, optical sensing, optical spectroscopy, and many other applications. Such a wide range of appl...

The use of tunable lasers (TL) in dense wavelength division multiplexed (DWDM) networks for optical switching, routing and networking has gained a lot of interest in recent years. Employment of such TLs as tunable transmitters in wavelength packet switched (WPS) networks is one of the possible applications of these devices. In such systems, the information to be transmitted could be encoded ont...

Introduction Recent progress in transmission capacity of dense wavelength-division multiplexed (DWDM) signals in a trunk optical fiber line now allows transmission of data beyond 10 Tbit/s over more than 100 km [1], [2]. The DWDM technology has to be applied to future millimeter-wave fiber-radio systems in order to take the capability to deal with the large amount of data capacity. There have b...

In this paper Raman-parametric amplifier has been investigated for long haul Dense Wavelength Division Multiplexed (DWDM), L-band transmission. The performance of the proposed hybrid model has been compared in terms of signal gain and OSNR with FOPA and EDFA FOPA. Feasibility of Raman-FOPA for future long haul extended DWDM systems has been explored. Results indicate an achievable OSNR of 28 dB...

Space-division multiplexing (SDM) attracts attention to cladding-pumped optical amplifiers, but they suffer from a low pump power conversion efficiency. To address this issue, ytterbium (Yb3+) and erbium (Er3+) co-doping is considered as an effective approach. However, it changes the gain profile of Er3+-doped fiber amplifiers induces difference between wavelengths in C-band, significantly limi...

The tremendous growth of the high speed Internet and data traffic has created an enormousdemand for transmission bandwidth of dense wavelength division multiplexed (DWDM) opticalcommunication systems. The conventional optical amplifiers, such as the erbium doped fiber amplifier(EDFA) and Raman amplifier, are the vital components for DWDM system. Hybrid optical amplifiersuse where it is necessar...

Optical Dense Wavelength Division Multiplexed (DWDM) networks are an attractive candidate for the next generation Internet and beyond. In this paper, we consider the wide area wavelength routed backbone network with circuit-switching. Given a session request, the routing and wavelength assignment (RWA) problem is to calculate a path between two nodes, and also assign a set of wavelengths along ...