Dense Wavelength Division Multiplexing (DWDM) system is limited by different impairments like optical attenuation, crosstalk, chromatic dispersion, polarization mode dispersion, Scattering etc. All of these impairments restrict the transmission distance and bandwidth. In the Present Scenario the DWDM system needs significant improvement, where analyzing the crosstalk of an Acousto-Optic Tunable...

A scheme for generating multiwavelength laser source based on a linear optical amplifier (LOA) is demonstrated for potential applications in dense-wavelength division multiplexing (DWDM) communication systems. The laser output shows up to 80 laser lines (SNR at least 20 dB) with 0.4 nm channel spacing covering C and L band. Simultaneous tuning of muti-wavelengths is also demonstrated.

Growth in internet traffic, perceived by some to be as high as 200% per annum [1], encouraged the widespread deployment of dense wavelength division multiplexing (DWDM) during the boom in optical communications between 1998 and 2001. By simply adding new wavelengths in existing fibers, DWDM was seen as a cost effective means for increasing network capacity to meet the growing demand without req...

Dense Wavelength Division Multiplexing (DWDM) enables the utilization of a significant portion of the available fiber bandwidth by allowing many independent signals to be transmitted simultaneously on one fiber, with each signal located at a different wavelength. In this paper, the two major non-linear effects such as FWM and SRS in transmission fiber must be simultaneously eliminated by Duobin...

The constantly growing needs in terms of speed and bandwidth, especially all services using data has become greedy. Today optical fiber is the medium choice for many advantages over others channels. although taken label transmission channels, we won’t be able to do without its nonlinear character dispersions, which are part major problems during transmission. In this article, presenting use sol...

This paper carries out a numerical simulation investigating three different modulation formats: carrier suppressed return to zero (CSRZ), modified duobinary (MDRZ) and (RZ). The purpose of this investigation is find the optimum format for hybrid optical code division multiple accesses–dense wavelength multiplexing (optical CDMA/DWDM) system with implementation an electro-optic phase modulator (...

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 paper deals with the concept of transmitting raw IP packets over an optical layer, which employs DWDM for increasing its bandwidth demand. It also gives a brief introduction to DWDM systems. The requirements for creating an all optical networks and the issues pertaining such an evolution have been discussed here. The protocol architecture based on multiprotocol lambda switching has also be...

Design of fault tolerant dense wavelength division multiplexing (DWDM) backbones is a major issue for service provision in the presence of failures. The problem is an NP-hard problem. This paper presents a genetic algorithm based approach for designing fault tolerant DWDM optical networks in the presence of a single link failure. The working and spare lightpaths are encoded into variable length...

A radio-on-dense-wavelength-division-multiplexing (DWDM) transport system based on injection-locked Fabry-Perot laser diodes (FP LDs) with four microwave carriers and large effective area fiber (LEAF) transmission was proposed and demonstrated. Good performance of bit error rate (BER) and intermodulation distortion to carrier ratio (IMD/C) over a-50 km of LEAF was obtained. Signal quality meets...