20 articles for “All-optical network”

Research ArticleOpen accessIn the abstractDevelopment of an Algorithm for Fiber-to-the-Home Passive Optical Network Automatic Self-restoration Scheme Using Access Control SystemMohammad Syuhaimi Ab-Rahman, Siti Raihan Ahmad MahirProblem statement: Cables that are installed outdoors are subjected to harsh environmental conditions which make break down inevitable. When this happen it will disrupt the services and cause trouble to the users. To overcome this is to provide a means of restoring the network in case of failure. We introduced the Access Control System (ACS) and Customer Access Protection Unit … …Journal of Computer Science, Vol. 7, Issue 12 · 19 Oct 2011 · 6,899 accessesView PDF Cite

Research ArticleOpen accessIn the abstractSynthesis and Optical Properties of ZnO-TeO2 Glass SystemH. A.A. Sidek, S. Rosmawati, Z. A. Talib et al.Problem statement: Systematic series of ZnO-TeO2 glasses with mole fraction of 0.10-0.40 ZnO content with an interval of 0.05 were studied to obtain their physical and optical properties. Approach: All the glass samples were synthesized by rapid melting quenching method under controlled conditions, while their refractive indices (n) were measured by the EL X-02C high precision ellipsometer. The room temperature … …American Journal of Applied Sciences, Vol. 6, Issue 8 · 31 Aug 2009 · 14,077 accessesView PDF Cite

Research ArticleOpen accessIn the abstractSolving the Near-Far Problem in Dynamic Frequency Hopping-Optical Code Division Multiple Access using Power ControlW. J.M. Al-galbi, M. Mokhtar, A. F. Abas et al.Problem statement: In this study, a distributed power control algorithm is proposed for Dynamic Frequency Hopping Optical-CDMA (DFH-OCDMA) system. Approach: In general, the DFH-OCDMA can support higher number of simultaneous users compared to other OCDMA techniques. However, the performance of such system degrades significantly as the received power does lower than its minimum threshold. Results: This may obviously occur in … …Journal of Computer Science, Vol. 5, Issue 6 · 30 Jun 2009 · 7,521 accessesView PDF Cite

Research ArticleOpen accessIn the abstractLow-Cost Encoding Device for Optical Code Division Multiple Access SystemMohammad Syuhaimi Ab-Rahman, Boonchuan Ng, Norshilawati Mohamad Ibrahim, Sahbudin ShaariProblem statement: Instead of using Fiber Bragg Grating (FBG) to develop the coded spectrums, which consist of expensive elements, the grating also are highly sensitive to environmental changes and this will contribute to the increment of capital and operational expenditures (CAPEX and OPEX). Approach: This study presented the development of low-cost 16-ports encoding device for Optical Code Division Multiple Access … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Jun 2009 · 7,638 accessesView PDF Cite

Research ArticleOpen accessIn the abstractCost-Effective Fabrication of Self-Made 1×12 Polymer Optical Fiber-Based Optical Splitters for Automotive ApplicationMohammad Syuhaimi Ab-Rahman, Hadi Guna, Mohd Hazwan Harun et al.Problem statement: Multimode fiber cables can conduct many light rays and can operate free of disruption and with a greater bandwidth than a wireless connection. However, due to a slight variation in the speed of the light rays through the multimode fiber, a signal transmitted by all of these rays becomes spread out. Consequently, the signals become broader and therefore … …American Journal of Engineering and Applied Sciences, Vol. 2, Issue 2 · 30 Jun 2009 · 7,925 accessesView PDF Cite

Research ArticleOpen accessIn the abstractWinner-Take-All Neural Network with Massively Optoelectronic InterconnectionsWissam H. Ali, Ahmed N. Abdalla, Wa'l H. AliThe increased interconnection density, bandwidth, nonlocality and fan-out-fan-in offered by optics over conventional electronic technologies make it a very attractive medium for a variety of application particularity in the field of communication system implementation for all types of computing engines is achieved. This is especially true for neural networks in which the demand for communication resources is extremely high. In … …American Journal of Applied Sciences, Vol. 6, Issue 2 · 28 Feb 2009 · 7,437 accessesView PDF Cite

Research ArticleOpen accessIn the abstractImpact of Four Wave Mixing (FWM) in Routing and Wavelength AssignmentTan Saw Chin, F.M. Abbou, Ewe Hong TatThe impact of Four-Wave-Mixing (FWM) is investigated using the proposed Assign Shortest Path First (ASPF) algorithm for wavelength assignment in Routing and Wavelength Assignment (RWA). Results show that ASPF algorithm indulges more FWM crosstalk in high optical channels for all input light power and low input power able to reduce he effect of FWM. The blocking probability due to FWM … …American Journal of Applied Sciences, Vol. 5, Issue 8 · 31 Aug 2008 · 6,753 accessesView PDF Cite

Research ArticleOpen accessIn the abstractMPLS over Segmented WDM Optical Packet Switching NetworksHakim Mellah, Fouad M. AbbouWavelength Division Multiplexing (WDM) is a promising solution for data transport in future all-optical wide area networks. Such networks consist of fibers joined by dynamically controllable cross-connects which provide purely optical transport between pairs of network access stations. Optical packet switching (OPS) is optical switching with the finest granularity. Incoming packets are switched all-optically without being converted to electrical signal. … …Journal of Computer Science, Vol. 2, Issue 5 · 31 May 2006 · 6,750 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordPerformance of Thin-Film as Wavelength Filter in Wdm-Pof NetworkMohd Syuhaimi Ab. Rahman, L. S. Supian, Hadi Guna et al.Problem statement: Huge capacity for data transmission and bandwidth are becoming a need nowadays. High cost of implementation using optical fibers prevents utilization of the technology as wide as possible. Approach: Wavelength Division Multiplexing (WDM) was a technique that offers the solution for providing better bandwidth. WDM technique allows several signals that have different wavelengths to be transmitted in a … …American Journal of Applied Sciences, Vol. 9, Issue 2 · 9 Dec 2011 · 7,270 accessesView PDF Cite

Research ArticleOpen accessAll words, across the recordAn Improved Handwritten Tamil Character Recognition System using Octal GraphR. J. Kannan, R. PrabhakarProblem Statement: Handwriting recognition has attracted voluminous research in recent times. The segmentation and recognition of the characters from handwritten scripts incorporates considerable overhead. Almost all the existing handwritten character recognition techniques use neural network approach, which requires lot of preprocessing and hence accomplishing these problems using neural network is a tedious task. Approach: In this study we propose a … …Journal of Computer Science, Vol. 4, Issue 7 · 31 Jul 2008 · 7,405 accessesView PDF Cite