is paper describes the design and implementation of the optical DWDM backbone of CESNET2 network Phase 6 in 2007. e article is divided into the following logical parts: technology and DWDM network deployment, three-way ROADM implementation and L2 over DWDM implementation.

The design of Interleaver/Deinterleavers using Fibonacciclass quasistructures is proposed. We introduce an optical passive configuration composed of Fibonacci quasistructures and circulators which acts as interleaver and deinterleaver. Odd and even channels are interleaved/deinterleaved with dense wavelength-division multiplexing (DWDM) multichannel filter based on Fibonacci quasi-periodic stru...

:This article covers functions and applications of DWDM system components. The operation of each component is discussed indivi dually. DWDM terminology like Attenuation, dispersion, and optical signal to noise ratio (OSNR) are measures of optical signal quality and are the key factors involved in DWDM system design and operation. From transmitter to receiver, the quality of the optical signal a...

This article addresses the issues of scalable end-to-end QoS in Metropolitan DWDM networks serving as transit networks for IP access networks. DWDM o ering few wavelengths have in the past been deployed in backbone networks to upgrade point-to-point transmission where sharing is based on coarse granularity. This type of DWDM backbone networks o ering few lightpaths, provides no support for QoS ...

Frees Space Optical (FSO) system employs empty space to transfer information between the transmitter and receiver using light. The single-beam Single Input Output (SISO) technology is well known for being subject air attenuation induced by weather conditions, which decreases performance link range data quality. proposed in this research a combination of DWDM MIMO approaches address issue. based...

As for the problems of complexity and long cycle in the DWDM design, part of problems needed to be considered in DWDM system design were analyzed. An optimized point-to-point DWDM transmission system was designed. Optical fiber communication system with 40Gbit / s and 32 channel was designed and simulated by Optisystem. Based on the study above, the model witch can inhibit dispersion and fiber ...

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...