1 High Capacity Optical Fiber Link Design For Telecommunication Backbone Network Imran Khan, M. Jakub Oleszko Abstract:- Telecommunication traffic (voice, data etc.) is increasing day by day. So to meet the capacity demand, in this paper we have designed and verified a high capacity optical fiber communication system through simulation. Bobcad cam v21 keygen musica. We simulated a 40 Gbps single optical fiber link for telecommunication traffic transmission which could be possible to implement in developing countries with few modifications in their existing optical fiber transmission link. We used Rsoft-OptSim commercial software to simulate it. Designed single optical fiber link length was 1000 km and the bit error rate found was 4.29e-10. Next, we used 8 channels WDM system in this link to get higher data transmission capacity which was 320 Gbps and the center channel i.e nm, bit error rate found was e-12. Index Terms:- BER, Capacity, EDFA, Eye Diagram, Gbps, Optical Fiber, WDM. 1 INTRODUCTION Now a day s high speed and high capacity are the two preconditions for telecommunication networks to provide good quality and huge support to the subscribers. Today s telecommunication network is mainly based on the optical fiber (OF). In many developing countries they have the optical fiber telecommunication network. But the speed and capacity both are low. Optical Communications. Fiber optic communication system, Applications. Network Analysis is a basic foundation course for the disciplines EEE. Forms, Text Fields, Inserting objects, Mail Merge in Word. K.Sudha Rani, “Laboratory Manual on Engineering Chemistry”. The users of these telecommunication networks are increasing day by day. Renee undeleter download. So it is necessary to upgrade the existing OF network to a high speedy and high capacity network. To do so we have designed and simulated a 40 Gbps single OF link which is easy and cost effective. For capacity increasing we also designed a WDM system with 8 channels which corresponds the total capacity of 320 Gbps data rate. We analyzed the design from the result of the simulation based on the BER and Eye Diagram. BER is defined as [1]- N E BER N (1) T Where NE is the number of bit errors occurring over a specific time interval and NT is the total number of bits sent during that interval. The Eye Diagram measurement technique is a strong method for assessing the data-handling ability of a digital transmission system. This technique is made in time domain and allows the effects of waveform distortion to be shown immediately on the display screen of standard BER test equipment [1]. Imran Khan is a faculty member in the Dept. Of Electrical and Electronic Engineering (EEE), Jessore Science & Technology University (JSTU), Jessore, Bangladesh, Or M. Скачать драйвера для dvb 7301. 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Jakub Oleszko completed combined masters degree program from Vrije Universiteit Brussel, Belgium & Poland. 2 SINGLE LINK DESIGN The basic elements used in the link are bit generator, Continuous Wave (CW) laser with peak power of 0.95 mw as a source, electrical signal generator, electrical modulator with MachZehnder modulation technique, optical fibers- Corning- SMF & Corning Vascade-S1000, optical amplifier- EDFA with 15.8 db gain and optical receiver with LPbessel type filter and the filter Band Width (BW) was 4*E10. This is shown in Fig. The length of the link was 1000 km nm wave length was used for this single link, as this is the common telecom wavelength. In Fig.1 the PRBS is the digital bit generator for the link, CWLaser is the continuous laser source, ElecGen is the electrical generator, ExtMod is the external modulator for the link. Next the Loop indicates the 1000 km OF within which the combination of fiber is as SMF (Corning-SMF ) and DCF (Corning Vascade-S1000) to compensate the dispersion in the link. Next element is the Edfa the optical amplifier to amplify the signal and finally the Receiver unit. ![]() 2.1 Result & Analysis Here we used 1550 nm wave length to design the link because the loss is less at this wavelength and this is the typical telecommunication wavelength. For this design the CW laser was chosen because this type of laser is much noise free than the pulsed laser. The external modulator was used instead of internal modulator to avoid the jitter noise. The two types of commercial fiber Corning-SMF & Corning Vascade-S1000 were used in a particular combination to compensate the dispersion. The first one is the common telecommunication fiber and the second one is used to compensate the dispersion. As the loss is negligible at 1550 nm wavelength the main concern goes to fiber dispersion.
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