Dense wavelength-division multiplexing networks waves system for high data rate communication

2010 ◽  
Author(s):  
N. J. Ansari ◽  
S. Nema ◽  
R. Singh ◽  
A. Goel
Keyword(s):  
Wavelength Division Multiplexing ◽  
Data Rate ◽  
High Data Rate ◽  
Dense Wavelength Division Multiplexing ◽  
Wavelength Division ◽  
High Data ◽  
Wavelength Division Multiplexing Networks

scholarly journals HIGH DATA RATE WDM SYSTEMS-BASED GRAPHENE CARRIERS

2020 ◽  
Vol 15 (11) ◽  
Author(s):  
Saib Thiab Alwan
Keyword(s):  
Wavelength Division Multiplexing ◽  
Data Rate ◽  
High Data Rate ◽  
Optical Channel ◽  
Phase Shift Keying ◽  
Error Vector Magnitude ◽  
Wavelength Division ◽  
High Data ◽  
Shift Keying ◽  
Vector Magnitude

In this paper, carrier’s generation-based graphene with applicability for wavelength division multiplexing (WDM) systems have been produced via an illumination of graphene by 980 nm. This technique allowed for servicing of a greater number of channels in a WDM system, and the carriers were able to travel in an optical channel with high data rate. Eight carriers, having a frequency spacing (FS) of 25 GHz and full-width at half-maximum (FWHM) of 500 MHz, were created. These generated carriers were separately modulated with eight optical quadrature phase shift keying (QPSK) signals and subsequently optically multiplexed and transmitted to an optical fiber channel. At the receiver side, the received signal was demultiplexed, and the performance of the system was analyzed via calculating the error vector magnitude and constellation diagram of the entire system. Opti System version 17.1 and Matlab software are used for demonstration of WDM system and carrier generation.

scholarly journals Performance Investigation of 40 GB/s DWDM over Free Space Optical Communication System Using RZ Modulation Format

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Sooraj Parkash ◽  
Anurag Sharma ◽  
Harsukhpreet Singh ◽  
Harjit Pal Singh
Keyword(s):  
Wavelength Division Multiplexing ◽  
Communication System ◽  
Free Space ◽  
Data Rate ◽  
Free Space Optical ◽  
Filter Bandwidth ◽  
Wavelength Division ◽  
High Data ◽  
Modulation Format ◽  
Space Optical Communication

We successfully demonstrate 40 GB/s 8 channels’ Dense Wavelength Division Multiplexing (DWDM) over free space optical (FSO) communication system. Each channel is transmitting 5 GB/s data rate in downstream separated by 0.8 nm (100 GHz) channel spacing with 1.8 GHz filter bandwidth. DWDM over FSO communication system is very effective in providing high data rate transmission with very low bit error rate (BER). The maximum reach of designed system is 4000 m without any compensation scheme. The simulation work reports minimum BER for Return-to-Zero (RZ) modulation format at different channels 1, 4, and 8 are found to be 2.32e-17, 1.70e-16, and 9.51e-15 at 4000 m distance, respectively. Sharp increase in BER occurs if data rate and distance increase up to 10 GB/s and 5000 m.

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