In this paper, a 16 channel 25 Gbps DWDM optical network is simulated and analyzed for 120 km using dispersion compensating fiber. The system is operated on -10dBm of Input Power. NRZ-DPSK modulation format is used for transmission under symmetrical compensation schemes. Group velocity and third order dispersion are compensated to improve the Q-factor. Impact of Third Order Dispersion as well a...

Recent developments in optical devices and communication protocols have made possible real-time provisioning in DWDM optical networks without human intervention. In order to provide an end-to-end optical path for an IP client, the widely known Routing and Wavelength Assignment (RWA) problem must be solved. In this paper we introduce a new RWA procedure meant to support different classes of serv...

We present Stereo Multiplexing, a novel technique that permits simultaneous direct detection of two modulated optical carriers. This is accomplished by modulating the optical carriers with the difference and the sum of two signals. The linear performance of Stereo-multiplexed DQPSK signals is compared to single-carrier DQPSK and dualcarrier DQPSK. Subsequently, by means of simulations, the robu...

요 약 IP 망을 활용한 VPN(Virtual Private Network)에서의 QoS 보장 및 광대역 서비스 제공에 대한 해결 방안으로 차세대 광 인터넷을 통한 OVPN(Optical VPN) 기술이 제시되고 있다. 차세대 광 인터넷의 구현 이 IP/GMPLS(Generalized Multi-Protocol Label Switching) over DWDM(Dense Wavelength Division Multiplexing) 프로토콜 프레임워크로 표준화되고 있는 현실에 비추어 볼 때, IP/GMPLS over DWDM 백본망을 통한 OVPN 은 차세대 가상사설망으로써 멀티미디어 서비스 제공을 위한 최적의 방안이 다. 이러한 멀티미디어 서비스 제공을 위한 OVPN 에서는 최적의 Optical-LSP(...

It is practical to estimate the pass band width (BW) and blocking band width of a dense wavelength division multiplexing (DWDM) filter as a function of refractive indices, spacers, number of layer pairs, and number of cavities before designing the filter. This can be a practical design guide as to which parameters should be used to gain a desired result. The derivation and resulting formulas fo...

A polarization-independent reflective grating with improved bandwidth is presented based on the mixed metal-dielectric grating. The novel grating is composed of the substrate, the metal slab, two dielectric layers, and the covering layer. The grating parameters are optimized for the special duty cycle of 0.6 at an incident wavelength of 1550 nm used in dense wavelength division multiplexing (DW...

Optical Dense Wavelength Division Multiplexed (DWDM) networks are an attractive candidate for the next generation Internet and beyond. In this paper, we consider the wide area wavelength routed backbone network with circuit-switching. Given a session request, the routing and wavelength assignment (RWA) problem is to calculate a path between two nodes, and also assign a set of wavelengths along ...

One of the issues that constrains the use of GMPLS protocol in DWDM links is the slow rerouting provided by GMPLS over DWDM networks.The 1+1 protection mechanism is an approach to solve it, where a backup link is employed as mirror to provide an immediate fault recovery. However, such solution is costly since a given channel must exclusively be allocated. Intelligent agents can execute the task...

Given the increasing adoption of DWDM networking technology, there is now a growing need to address distributed inter-domain lightpath provisioning issues. Although inter-domain provisioning has been well studied for packet/cell-switching networks, the wavelength dimension presents many additional challenges. To address this challenge, a detailed hierarchical routing GMPLS-based framework for p...