Abdullah, Mohamad Khazani

Universiti Putra Malaysia Institutional Repository

Research Directory: Part 1 - Section t: R&D Products I Engineering SciencesFiber Optic Duplexer Module (FDM)Telecommunications and Internet Service Providers, the content developers,and the reT end-customers are always looking for ways to increase the com-munication system bandwidth in order to satisfy the ever-increasing demand. In the bigcities and metropolitan areas, fiber optics installed onlyseveral years back are used to its full capacity. There-fore, new fiber have to be constantly installed, but at avery high cost. Thus, a new but simple way of so.lving this problem Isdesirable and Is introduced by UPM. Fiber Duplexer Module (FDM) is atotally passive optical device capable of doubling fiber utllization. It con-verts fiber optics simplex transmission mode (one fiber in each direction)Into full duplex transmission (bl-directional transmission in a fiber). Thususing only a single fiber core per link Instead of two cores In the existingsystems. This is achieved without wavelength conversions, optical-Fiber Duplexer Module (FDM)electrical conversion and without power supplies.FDM installed in the existingnetworksThis device comes with some special features. Totally passive componentsused to develop FDM make this device transparent of bit rate, transmissionformat and network architecture. It is a plug-and-play device that can beinstalled in less than five minutes without requiring any high skill personnel.All the features mentioned make FDM very flexible to support a single fiberbi-directional transmission with no maintenance required. FDM can support.up to 70 km fiber distance. This is a fiber opttcs typical transmission dis-tance without amplifier. The quality of the data is maintained at zero BitError Rate (BER) at up to 2.5 Gbps (STM-16) transmission rate as success-fully tested at Telekom Malaysia Testbed.The main advantage of FDM Is that it could be installed In the existing networks without interfering withthe communication eQuipment. The existing fibers that are used to support simplex transmission couldnow support full duplex transmission without any modification to the equipments involved. This capabilitygives advantage to most system users, especially lease line companies, where maximum fiber utilizationhas become among their main objectives.By doubling the fiber utilization, more bandwidth is suddenly available, thus the service providers couldoffer more applications to the customers. This could benefit the telecommunication companies in thecountry such as Telekom Malaysia, Maxis, Time dot Com, and MIMOS. The bandwidth increment leads tothe increment in the number of customers and the applications. FDM also enables the use of some of thefiber cores as the back-up or protection channels at no additional cost.37Universiti Putra MalaysiaFDM basically could support fiber optics LAN, SONET/SDH System and DWDM System and transparent toprotocols such as ATM, FDDI and IP.The product has won several medals and is patent-pending under Malaysian Patent registration number PI20030426.For further information, kindly contact:Assoc. Prof. Dr. Mohamad Khazani AbdullahPhotonic LaboratoryDepartmenl of Computer and Communication Systems EngineeringFaculty of EngineeringUniversiti Putra Malaysia43400 UPM. Serdang, SeJangorMalaysiarei: +603 89466454, Fax.: +603-86577127E-mail: khazani@eng.upm.edu.my38

Fiber optic duplexer module (FDM)

http://psasir.upm.edu.my/51838/1/Fiber%20optic%20duplexer%20module%20%28FDM%29.pdf

Fiber optic duplexer module (FDM)

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Universiti Putra Malaysia Institutional Repository