Bidirectional Hybrid Optical Communication System Based on Wavelength Division Multiplexing for Outdoor Applications

2021 ◽  
Author(s):  
Sinan M. Abdulsatar ◽  
Mohammed A. Saleh ◽  
Abadulla Abass ◽  
M. H. Ali ◽  
Mohammed Ali Yaseen
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
Data Transmission ◽  
Communication System ◽  
Optical Switch ◽  
Heavy Rain ◽  
Free Space Optical ◽  
Wavelength Division ◽  
Backup System ◽  
All Optical

Abstract The simulation and investigation of a 32×10 Gb/s WDM all–optical bidirectional hybrid communication system for outdoor applications is presented in this article via multidisciplinary softwares. In order to track the system condition, a strain sensor based on fiber Bragg grating (FBG) is integrated in–line with the fiber optic link (FO–link). Then, a free space optical link (FSO–link) with 4–channel is simulated to act backup or rescue to the FO–link in the event of disaster or bombing. The FO–link is working well until the strain reach to 180 µε, after that the FO–link has degraded. Therefore, an optical switch is incorporated in between these systems (FO–link & FSO–link) to turn–on the FSO–link which act as a backup system to FO–link and maintains the continuity of the data transmission. According to the hybrid link results, there is an efficient enhancement in the Q–factor as compared with the FO–link even when there is heavy rain.

scholarly journals Comparison of the Optical Amplifiers EDFA and SOA Based on the BER and Q-Factor in C-Band

2017 ◽  
Vol 2017 ◽  
pp. 1-9 ◽  
Author(s):  
Tomáš Ivaniga ◽  
Petr Ivaniga
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
Communication System ◽  
Optical Amplifiers ◽  
Software Tool ◽  
Optical Amplifier ◽  
Communication Line ◽  
Optical Communication System ◽  
Wavelength Division ◽  
Fibre Amplifier

Currently it is not possible to create a fully optical communication system without a software tool which simulates an optical communication line in real conditions prior to its construction. The aim of this article is to establish a comparison between the EDFA (erbium doped fibre amplifier) and SOA (semiconductor optical amplifier) optical amplifiers in the WDM (wavelength division multiplexing) system. The system contains a four-channel WDM with speed of 10 Gbps and optical fibre with length of 80 km. Simulations are conducted in the programme environment “OptSim.” The quality of the optical communication system is evaluated by the BER (bit error rate) and Q-factor for individual wavelengths, namely, of 1558 nm and 1562 nm, which are within the C-band.

Application scheme and performance analysis of free space optical communication technology in INMARSAT

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Zhongli Yi ◽  
Fuzhai Wang ◽  
Lianjie Jin ◽  
Yueying Zhan
Keyword(s):  
Communication Technology ◽  
Wavelength Division Multiplexing ◽  
Optical Communication ◽  
Communication System ◽  
Free Space ◽  
Transmission Rate ◽  
Free Space Optical Communication ◽  
Free Space Optical ◽  
Error Vector Magnitude ◽  
Space Optical Communication

Abstract In this study, we propose an application scheme of free space optical communication technology in INMARSAT, and propose a 1.12 Tbit/s coherent free-space optical (FSO) communication system based on wavelength division multiplexing (WDM) and polarization-multiplexing quadrature phase shift keying (PM-QPSK) modulation technology. Based on optisystem software platform, the spectrum, bit error rate (BER), received power, error vector magnitude (EVM), and receiver sensitivity of the edge and middle channels of the system are analyzed. The simulation results show that the transmission rate and channel capacity of INMARSAT communication system are greatly improved by selecting the channel spacing and transmission environment reasonably.

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.

scholarly journals FSO Communication: Benefits, Challenges and Its Analysis in DWDM Communication System

2020 ◽  
Vol 9 (02) ◽  
Author(s):  
Muhammad Faisal Nadeem Khan ◽  
Haleema Khalil ◽  
Farhan Qamar ◽  
Mudassar Ali ◽  
Romana Shahzadi ◽  
...  
Keyword(s):  
Wavelength Division Multiplexing ◽  
Communication System ◽  
Research Work ◽  
Weather Conditions ◽  
Free Space Optical ◽  
Wavelength Division ◽  
Transmitter Power ◽  
Evolving Networks ◽  
Link Performance ◽  
Amplifier Gain

 Free-space optical (FSO) communication is one of the choice of researchers for most of the bandwidth hungry applications in evolving networks where the deployment of optical fiber is not directly possible as a transmission medium. In this research article, benefits, challenges, applications and role of FSO is discussed in detail for evolving networks. Further, performance of FSO communication system is tested using four channels of dense wavelength division multiplexing (DWDM). Various simulations are performed on FSO including different weather conditions, that directly affect the link performance. Many important parameters such as distance, data rate, bit error rate, amplifier gain, transmitter power, and attenuation under different weather conditions are tested in this research work. The operation of FSO communication system is carried out in the range 760-850 nm where equal channel spacing is considered for the working of DWDM communication system. Moreover, a fair comparison of proposed system is also presented for its operation in two more bands i.e. C and L-band, to show which one offers better performance. Simulation are performed in licensed version of Optisystem 14.0 and MATLAB. For the analysis of proposed system, results are presented in the form of BER and Q-factor plots.

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