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This research work focuses to design Hybrid OCDMA over WDM system with advance modulation techniques DPSK which will improve the performance for long distance fiber length. Hybrid system merges with different types of techniques like OCDMA and WDM. Modified double weight (MDW) code is proposed as the signature address code. Multiuser interference and increase the bit-error-rate might be condense satisfactory...
We present a nanoseconds optical cross-connect switch with wavelength, space, and time switching operation for high performance optical metro/access networks and data center networks. The fast optical switches can enhance the performance of optical networks by providing large-capacity switching capability and efficiently sharing the data plane resources by exploiting statistical multiplexing. Results...
The rocketing grow of demand for communication capacity in fiber back hauls led researchers to a new wireless carrier medium. Laying down optical fibers and maintaining them has proven to be enormously costly and time taking therefore, free space optical (FSO) communication has been introduced to provide fiber like transmission capacity to short reach users. One of the main features of a FSO system...
The overall behavior of some twisted-pair CAN systems may be improved by use of optical fiber as physical medium. In this paper, a novel fiber CAN hub and the schemes of constructing CAN network based on it are proposed. The working principle of the hub is discussed in detail. WDM (Wavelength Division Multiplexing) technology is utilized to realize duplex signal transmission on one fiber link. By...
We present experiments on bidirectional transmission with 2.5 Gb/s for downstream and upstream data rates over 10 km transmission distance to complete a WDM PON by SOA for ONU and realize the downstream optical signal is reused for upstream transmission. The results show that OAN and ONW is extincted and the extinction ratio (ER) is reduced to 0 db when the output optical of SOA pass through Scheme...
In this work we investigate the performance of hybrid technology using wavelength and optical code division multiplexing (WDM/OCDM) applied in a transparent optical network based on circuit switching. The optical network was designed to have an unbalanced number of resources that is planned with the knowledge of the Logical Connection Degree of each network node. In addition, the number of optical...
In this paper, regular low-density parity-check (LDPC) codes have been applied for the first time to a low cost spectrum-sliced WDM system. The Gaussian approximation of the noise in such system has been commonly used in previous studies, and there is a standard LDPC code for symmetric additive white Gaussian noise (AWGN) channels. However, in the system considered here the actual noise character...
One extended Welch-Costas (EWC) code family for the wavelength-division-multiplexing/spectral-amplitude coding (WDM/SAC; WS) optical code-division multiple-access (OCDMA) networks is proposed. This system has a superior performance as compared to the previous modified quadratic congruence (MQC) coded OCDMA networks. However, since the performance of such a network is unsatisfactory when the data bit...
We have presented a polymer wavelength division multiplexing (WDM) filter based on multimode interference and developed a hybrid integrated optical module for 1.31/1.55-mum bidirectional operation. The active devices were integrated on a silicon optical bench platform by flip-chip bonding technique. The polymer WDM filter chip using polymethylmethacrylate (PMMA) was fabricated by the hot embossing...
In this paper, a novel transmission configuration for SCM/WDM radio over fibre communication systems is proposed and experimentally demonstrated. The scheme is based on the spectrum slicing of a low-cost optical broadband source to obtain a set of optical channels compatible with WDM technology. In order to increase the frequency operation range limited to hundreds of MHz due to the fibre dispersion...
In this paper we propose the use of bit error rate (BER) as a differentiation of service parameter for connection provisioning in optical wavelength division multiplexing (WDM) networks. This is achieved through the use of impairment constraint based routing (ICBR), whereby various BER thresholds are set for accepting/blocking requests at the connection provisioning phase, depending on QoS requirements...
We discuss the suitability of digital signal processing (DSP) and optical orthogonal frequency division multiplexing (OFDM) for optical interconnects in applications such as data centers and high performance computing. The performance and power dissipation of this technology is reviewed and compared with single carrier binary modulation formats used in parallel fiber and wavelength division multiplexed...
Optical and wireless integration in the same platform is an essential requirement for future access networks in order to achieve an economically feasible business model, especially for the deployment of Next Generation Networks. The combination of both technologies offers high bandwidth together with mobility, thus making a strong contribution to future high capacity applications. PON (passive optical...
Todaypsilas access network is migrating towards broadband IP, fixed/mobile convergence and service convergence. Thus, the next generation access network (NGAN) requires a converged optical/wireless access network infrastructure, other than the existing architecture that connect to the cellular, broadband wireless, and optical access networks separately, which complicate the network and increase the...
In conventional optical data transmission schemes, electrical filters and/or optical filters are used to improve the quality of system performance. In this paper, improved design of dense wavelength division multiplexing (DWDM) optical systems is achieved by using a selective electrical filter assignment method. The methodology objective is to optimize system design and mitigate the effects of fiber...
A method to expand passband of a novel tunable chromatic dispersion compensator (TCDC) based on ring resonator utilizing negative group delay peak was proposed and confirmed experimentally. Passband utilization of FSR exceeded 80%.
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