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Sharma, Vishal
- Modeling and Simulation of EPON Based Symmetric FTTH Access Network
Authors
1 Shaheed Bhagat Singh State Technical Campus, Ferozepur, Punjab, IN
Source
Networking and Communication Engineering, Vol 4, No 15 (2012), Pagination: 944-948Abstract
Longer reach and higher splits along with high speed is the future demands of a next-generation access (NGA) system and such systems can be envisaged as Passive Optical Network (PON) technology. In this paper, the performance of a long-reach EPON based symmetric FTTH system with eight splits has been investigated on the performance metrics viz. eye-diagram, eye-opening Factor, Q Factor, extinction ratio (ER) and SNR. In our demonstrated EPON based FTTH access network, the downstream channel at 622 Mbps-1Gbps is transmitted from OLT to ONUs over a SSMF up to 40 Km at operating wavelength of 1550 nm. The same SSMF fiber is used for upstream transmission of channels at operating wavelength of 1300 nm. Results obtained with acceptable Q Factor, eye opening, SNR and extinction ratio at minimum power transmission without using any amplifier in upstream- and downstream-mode simultaneously confirm the feasibility of proposed long-reach EPON based symmetric FTTH system.Keywords
FTTH, PON, SNR.
- Impact of Fiber Raman Amplifier (FRA) in DCF Based High Speed WDM System
Authors
1 Shaheed Bhagat Singh State Technical Campus (A Punjab Government Establishment), Ferozepur, Punjab, IN
Source
Networking and Communication Engineering, Vol 4, No 14 (2012), Pagination: 863-867Abstract
A presentation appraisal of dispersion compensating fiber (DCF) based 40 Gbps WDM system incorporating FRA is carried out in view of two different cases. In case A, a simulative analysis of high speed WDM system is demonstrated with Raman amplification (Type II) incorporating pumped DSF (act as FRA) fiber and compared its performance with the WDM system not using Raman amplification (Type I). In case B, different DCF compensation techniques such as pre-compensation (Type III) and post-compensation technique (Type IV) are studied incorporating pumped DSF (act as FRA) fiber to weigh up the performance of WDM system. The performance metrics for instance Q factor, eye diagrams, eye opening and eye closure penalty are considered by simulating different WDM systems.Keywords
Dispersion Compensating Fiber (DCF), Dispersion Shifted Fiber (DSF), and Fiber Raman Amplifier (FRA).- Crosstalk Due to XPM under the Impact of Higher Order Dispersion Parameters in SCM-WDM Link
Authors
1 Shaheed Bhagat Singh College of Engineering and Technology, IN
Source
Networking and Communication Engineering, Vol 4, No 4 (2012), Pagination: 183-189Abstract
In this paper, an effort has been made for the comprehensive investigation to ascertain the XPM-induced crosstalk in SCM-WDM communication system under the individual and combined impact of 2OD- and 3OD- coefficients at varied modulation index, walk-off parameter, modulation frequency, average input optical power and optical span. It has been reported that the XPM-induced crosstalk rises exponentially with optical transmission span and modulator frequency under the under the individual and combined impact of 2OD- and 3OD- coefficients. But, the impact of 3OD is very low as compare to 2OD but there will be an impressive influence of 3OD in long-haul SCM-DWDM systems. Furthermore, the XPM-induced crosstalk decreases with decreases walk-off parameter and increases with increases modulation depth of analog signal. This work presents a detailed and improved investigation on the impact of higher dispersion parameters in SCM-WDM link over XPM induced cross talk which is not reported in previous research work.