Optical networks are in the evolution of transparent architectures, the effects of the physical layer impairments are becoming more and more prominent. This paper setting out from multiple physical impairments, analyzes the effects as well as the diversity and complexity of the physical layer impairments in optical networks, investigates the issue of the current-related physical layer impairmen...

Transparent and translucent optical networks are widely considered as the prime candidates for the core network technology of the future. These networks provide ultra high speed end-to-end connectivity with high quality of service (QoS) and resilience to failures. This will be achieved through appropriate network planning techniques. A downside of transparency, however, is the accumulation of p...

We face the Routing and Wavelength Assignment problem considering as constraints the physical impairments that arise in all-optical networks. We propose a simple model for the physical layer considering both static and dynamic impairments. It is based on simulation of signal propagation in order to characterize each lightpath with a reliability parameter.

The work done in this thesis focuses on the impact of transmission impairments in high speed optical networks. Specifically it focuses on the impact of nonlinear impairments in long haul fiber optic data transmission. Currently deployed fiber optic transmission networks are running on NRZ OOK modulation formats with spectral efficiency of only 1 bit/symbol. To achieve spectral efficiency beyond...

In this work, we assess the impact of several physical layer impairments (PLIs) on performance optical networks based colorless, directionless and contentionless reconfigurable add/drop multiplexers (ROADMs), through Monte-Carlo simulation, considering polarization division multiplexing 4 16 quadrature amplitude modulation (QAM) signals, at 28 GBaud, for 37.5 GHz channels. The PLIs taken into a...

Many investigations have been carried out in the field of path protection and restoration in WDM optical networks. Most of these studies neglect the impact of physical layer impairments on routing and wavelength assignment strategies, and more specifically on protection strategies. Actually, an optical signal undergoes throughout its route many transmission impairments. In the absence of 3R reg...