Merging the adaptive networks with the free space optical (FSO) communication technology is a very interesting field of research because by adding the benefits of this technology, the adaptive networks become more efficient, cheap and secure. This is due to the fact that FSO communication uses unregistered visible light bandwidth instead of the overused radio spectrum. However, in spite of all ...

This paper presents methodologies for dimensioning access networks based on ATM technology, taking as a case study the Passive Optical Access Network (PON) being developed as part of the Broadband Loop (BBL) project, from the European Program ACTS Advanced Communications Technology and Services.

In this paper, a new genetic algorithm is introduced which is used as a versatile tool for solving different types of optimization problems arising in the field of network planning. The genetic algorithm is applied to the minimum Steiner tree problem which plays an important role in the design of tree-structured passive optical networks in the access area. Furthermore, the same genetic algorith...

Linear optical networks are devices that turn classical incident modes by a linear transformation into outgoing ones. In general, the quantum version of such transformations may mix annihilation and creation operators. We derive a simple formula for an effective Hamiltonian generating the scattering operator of a general linear quantum network. Our formula shows how to compute the effective Ham...

According to a quick growth of the bandwidth capacity of WDM network, traffic damage due to a failure of network components is becoming unacceptable. To overawe this problem, a protection method that prepares backup light paths for each working path is now considered to improve reliability of networks. In this paper, it proposes an energy efficient routing in WDM passive optical networks. Routi...

Turbo product codes (TPCs) are an attractive solution to improve link budgets and reduce systems costs by relaxing the requirements on expensive optical devices in high capacity optical transport systems. In this paper, we investigate the use of Reed-Solomon (RS) turbo product codes for 40 Gbps transmission over optical transport networks and 10 Gbps transmission over passive optical networks. ...

In the present paper, high transmission bit rate of a thermal arrayed waveguide grating (AWG) which is composed of lithium niobate (LiNbO3)/polymethyl metha acrylate (PMMA) hybrid materials on a silicon substrate in Passive Optical Networks (PONs) has parametrically analyzed and investigated over wide range of the affecting parameters. We have theoretically investigated the temperature dependen...

Optical access has long been considered a final solution to the problem of upgrading the current bottlenecked access to the one capable of delivering future broadband integrated services due to the huge capacity of an optical fiber. Because optical fibers have been used in backbone networks, Wide Area Networks (WANs), and Metropolitan Area Networks (MANs), and are also being introduced in Local...