In this paper we described a structure of an original multiwavelength optical fiber source for DWDM systems. In order to obtain a several dozen of optical carriers with highly stable channel spacing of 4.5GHz a single laser source and acousto optic frequency shifter were used. Results of the analysis of the structure properties were presented. Key-Words: DWDM, EDFA, multiwavelength

This paper proposes a Carrier Sense Multiple Access with Carrier Preemption (CSMA/CP) MAC protocol for the DWDM Metropolitan Area Network (MAN) Access ring networks. In the network, each node is equipped with one tunable transmitter and multiple fixed receivers. This protocol provides variable size IP packets directly over all-Optical DWDM MAN ring networks and gives the more efficient bandwidt...

The operational model for large Internet service providers is moving to a multi-layer architecture consisting of IP/MPLS coupled with OTN/DWDM. While there has been significant work on multi-layer networks, the explicit modeling in IP/MPLS over OTN/DWDM has not been addressed before. In this paper, we present a detailed network optimization model for the operational planning of such an environm...

This paper completely deals with optical signal transmission; with encapsulation entire raw packets are converted as optical signals. Since the usage of internet and intranet are increasing day by day, the demands for bandwidth are also getting increased. In order to meet this demand, DWDM is deployed. DWDM enables service providers to accommodate consumer demand for ever-increasing amounts of ...

We investigate reduction of mode partition noise of a spectrally sliced Fabry-Perot laser diode (FP-LD) for application to seeded DWDM systems. The proposed scheme for the noise reduction incorporates a fiber-based Mach-Zehnder interferometer (MZI) and a reflective semiconductor optical amplifier (RSOA). The MZI enables to reduce a relative intensity noise (RIN) more than 3 dB with better noise...

We investigate the possibility of optical waveguide with multi-levels index of refraction in the core region (more than two-levels) for multi-wavelengths applications analytically and numerically. We show that with slowly varying apodization all of dense wavelength division multiplexing (DWDM) applications with 30-dB sideband suppression and insertion losses of less than 1-dB can be implemented...

This papers show that the adoption of a duo binary Modulation scheme reduces the impact of FWM in a DWDM system. The levels of the FWM products are reduced by around 10 dB which will offer a significant performance benefit in digital systems. We have taken into consideration great demand for high data rate & have designed optical fiber system for 40 Gbps. Keywords-dispersion shifted fiber (DSF)...

A method for non-intrusively monitoring the polarization dependent loss (PDL) of an installed fiber-optic transmission system is proposed using live dense wave division multiplexing (DWDM)-based traffic as the probing signal. The method extracts the statistical parameters of system PDL from the measured partial PDL data. Field measurements of PDL were performed on long-haul DWDM systems deploye...

Dense wavelength division multiplexing (DWDM) has become the dominant transport layer technology for next-generation backbone networks due to its unprecedented capacity scalability. As a result, there is a pressing need to investigate lightpath provisioning in multidomain DWDM networks. Although inter-domain provisioning has been well-studied for packet/cell-switching networks, the wavelength d...