A new optical local area network that combines dense Wavelength Division Multiplexing (WDM) techniques and coherent transmission4,5 benefits is presented. A new multichannel protocol is specified based on Ethernet1, using WDM to carry multiple channels on a single fiber. The protocol is simulated to evaluate the performance under congestion conditions and to compare it with other protocols havi...

Fiber gratings operating in the transmission mode can provide high dispersion at wavelengths close to the Bragg resonance. When multiple gratings are cascaded for wavelength division multiplexing (WDM) applications, the net dispersion between the stop bands of any two consecutive gratings is significantly modified. We discuss the dispersion characteristics of such cascaded fiber gratings and pr...

The paper describes an approach to the optical transmission network modeling. The modeling process is based on two main assumptions – transmission network carries IP datagrams using layer 2 protocol as a framing technique and Wavelength Division Multiplexing (WDM) is used as a transmission technique on the physical layer. Protection and restoration mechanisms have been implemented on the photon...

Semiconductor Raman amplifiers are useful for frequency selection in terahertz bandwidth and wavelength division multiplexing (WDM) systems with terabit capacity, as well as direct terabit optical communication systems. We have developed GaP–AlGaP Raman waveguides with micrometer-size cross sections. We have reduced residual optical loss of the waveguide by improvement of the fabrication proces...

We propose an online traffic engineering (TE) scheme for efficient routing of bandwidth guaranteed connections on a Multiprotocol label switching (MPLS)/wavelength division multiplexing (WDM) network with a traffic pattern varying with the time of day. We first consider the problem of designing the WDM virtual topology utilizing multi-hour statistical traffic pattern. After presenting an effect...

This article discusses the possible applications for optical networks based on wavelength division multiplexing and how they compete and complement current high-speed networks (SONET,ATM). We rst outline the best-case scenario for this technology and describe the spectrum of proposed optical networks (WDM links, passive optical access networks, broadcast-and-select networks, and wavelength rout...

We report the design criteria and performance of Si ring resonators for passive athermal applications in wavelength division multiplexing (WDM). The waveguide design rules address i) positive-negative thermo-optic (TO) composite structures, ii) resonant wavelength dependent geometry to achieve constant confinement factor (Gamma), and iii) observation of small residual second order effects. We d...

In this paper, optimization procedures based on particle swarm optimization (PSO) are investigated, aiming to efficiently solve the optimal resource allocation for signal-to-noise plus interference ratio (SNIR) optimization of optical code paths (OCPs) from wavelength division multiplexing/optical code division multiplexing (WDM/OCDM) considering imperfections on physical layer. The characteris...

This paper studies the oo-line wavelength assignment problem in star and ring networks that deploy multiple bers between nodes and use Wavelength Division Multiplexing (WDM) for transmission. The results in this paper show that the ability to switch between bers increases wavelength utility. In particular, sharper per-ber bounds on the number of required wavelengths are derived for the multiibe...

Single-hop wavelength division multiplexing (WDM) optical ring networks operating in packet mode are a promising architecture for the design of innovate Metropolitan Area Networks (MANs). They allow a cost-effective design, with a good combination of optical and electronic technologies, while supporting features like restoration and reconfiguration that are essential in any metropolitan scenari...