Nowadays, Dense Wavelength Division Multiplexing (DWDM) has become a key component of the world’s communications infrastructure. The significant improvement in high-speed electronics and optical components, and multi-level modulation formants and coherent receiver technology has enabled high rate data transmission. DWDM promises to increase the bandwidth per fiber as the bit rate and the number...

Dense wavelength division multiplexing (DWDM) networks that use expensive optical/electrical/optical (O/E/O) conversion at each end of a fiber link are called opaque networks. In an attempt to reduce the O/E/O conversion cost component, a combination of technological advances has been used. Improved optical amplifiers using distributed Raman amplification allow signals to traverse longer distan...

The ever-increasing demand for applications in internet, digital cable TV, e-mail, data transmission etc. has forced the utilization of the available more than two THz transmission bandwidth of single-mode optical fiber at low loss and low dispersion window of 1550 nm. Most of the optical communication systems in use today range from 2.5 Gbit/s, 10 Gbit/s and 40 Gbit/s while 160 Gbit/s and 480 ...

Multilayer network design has received significant attention in current literature. However, the explicit modeling of IP/MPLS over OTN over DWDM in which the OTN layer’s technological constraints are specifically considered has not been investigated before. In this paper, we present an optimization design model for protecting an IP/MPLS over OTN over DWDM three-layer network. While considering ...

We propose a simple and cost-effective method, using direct frequency modulation (FM) noncoherent detection (NCD) scheme, to suppress the nonlinear optical effects in dense wavelength division multiplexed (DWDM) communication. The FM transmitter comprises directly modulated distributed feedback laser saturable semiconductor amplifier. In NCD receiver, an slope filter as intensity (IM) signal co...

This report describes the progress in CESNET2 NREN and results achieved in 2006. It includes optical DWDM and IP/MPLS network layers deployment and further describes the current network status and network services.

Photonic network-on-chip (PNoC) architectures employ photonic links with dense wavelength-division multiplexing (DWDM) to enable high throughput on-chip transfers. Unfortunately, increasing the DWDM degree (i.e., using a larger number of wavelengths) achieve higher aggregated data rate in and, hence, PNoCs, requires sophisticated and costly laser sources along extra hardware. This hardware can ...

This paper describes an all-optical network architecture, Lambda Grid, for efficient, scalable, and cost-effective Mass Storage Systems. The architecture is based on wavelength services. A new concept of logical DWDM is introduced and its hardware implementation is described.