Performance enhancement of ultra-dense WDM over FSO hybrid optical link by incorporating MIMO technique

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Rajneesh Kumar ◽  
Love Kumar
Keyword(s):  
Wavelength Division Multiplexing ◽  
Data Transmission ◽  
Free Space ◽  
Performance Enhancement ◽  
Transmission Rate ◽  
Weather Conditions ◽  
Optical Signal ◽  
Optical Data ◽  
Free Space Optical ◽  
Modulation Formats

AbstractFree-space optical (FSO) communication is a wireless optical data transmission technology with a high data transmission rate. It has received much attention in recent years as it is cost-effective and has license free operation. It is line of sight free-space communication technique where optical signal severely degraded from atmospheric losses especially due to weather conditions; hence it restricts the link range and data carrying capacity. Therefore, a 16-channel ultra-dense wavelength division multiplexing–free space optics (UWDM–FSO) system each having each 10 Gb/s data rate is proposed to enhance the capacity and performance of FSO system. To authenticate the performance of the proposed system, investigation for different modulation formats such as nonreturn to zero (NRZ), return to zero (RZ), carrier suppressed return to zero (CSRZ) and duo binary (DB) are reported. Further, to reduce the atmospheric interference, multiple input multiple output (MIMO) technique is integrated into the proposed system. The outcomes of MIMO–UWDM–FSO link revealed a significant improvement in the bit error rate (BER), eye diagram and Q-factor, under different weather conditions. It is also observed that NRZ modulation formats perform better than RZ, CSRZ and DB formats.

Erbium/Ytterbium-Doped Waveguide Amplifier (EYDWA) for extended reach of Wavelength Division Multiplexing based free space optics system (WDM/FSO)

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Bentahar Attaouia ◽  
Kandouci Malika ◽  
Ghouali Samir
Keyword(s):  
Wavelength Division Multiplexing ◽  
Free Space ◽  
Cost Effective ◽  
Weather Conditions ◽  
Free Space Optical ◽  
Wavelength Division ◽  
Space Optics ◽  
Effective Implementation ◽  
Transmission Distance ◽  
The Cost

AbstractThis work is focused to carry out the investigation of wavelength division multiplexing (WDM) approach on free space optical (FSO) transmission systems using Erbium Ytterbium Doped Waveguide Amplifier (EYDWA) integrated as post-or pre-amplifier for extending the reach to 30 Km for the cost-effective implementation of FSO system considering weather conditions. Furthermore, the performance of proposed FSO-wavelength division multiplexing (WDM) system is also evaluated on the effect of varying the FSO range and results are reported in terms of Q factor, BER, and eye diagrams. It has been found that, under clear rain the post-amplification was performed and was able to reach transmission distance over 27 Km, whereas, the FSO distance has been limited at 19.5 Km by using pre-amplification.

Analog ghost hidden in 2D random binary patterns for free-space optical data transmission

2022 ◽  
Vol 150 ◽  
pp. 106880
Author(s):  
Yin Xiao ◽  
Lina Zhou ◽  
Zilan Pan ◽  
Yonggui Cao ◽  
Mo Yang ◽  
...  
Keyword(s):  
Data Transmission ◽  
Free Space ◽  
Optical Data ◽  
Free Space Optical

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.

Performance Evaluation of System in Free Space Optic Utilizing Gaussian Optical Filter in Different Detection Scheme

2019 ◽  
Vol 41 (1) ◽  
pp. 31-36
Author(s):  
H. Djellab ◽  
A. Bouarfa ◽  
S. Bojanic
Keyword(s):  
Wavelength Division Multiplexing ◽  
Free Space ◽  
Direct Detection ◽  
Optical Filter ◽  
Weather Conditions ◽  
Spectral Amplitude ◽  
Free Space Optical ◽  
Detection Scheme ◽  
High Data ◽  
Code Division Multiple

Abstract In recent years, free space optical communication (FSO) has become a leader for its unique characteristics: large bandwidth, unlicensed spectrum, simple implementation, low power and high data rate. However, we use as a transmission medium for Spectral Amplitude Coding-Optical Code Division Multiple Access SAC OCDMA system. In this paper, we investigate the optimum received power of FSO communication system employing SAC OCDMA, by using different detection technique, such us Spectral Direct Detection SDD and Single Photodiode Detection (SPD) technique under optical Gaussian filter decoder schemes with Modified Double Weight code (MDW). In this work, the adverse effects of atmospheric channel limit the possibility of a large FSO communication, moderate turbulence and hazy weather conditions are considered. The results show that the performance of the proposed system with wavelength-division-multiplexing (WDM) multiplexer (MUX) based on Gaussian optical filter with SDP detection fares better than the system employing SDD technique.

scholarly journals Blue Laser Diode Based Free-space Optical Data Transmission elevated to 18 Gbps over 16 m

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Yu-Fang Huang ◽  
Yu-Chieh Chi ◽  
Hsuan-Yun Kao ◽  
Chen-Ting Tsai ◽  
Huai-Yung Wang ◽  
...  
Keyword(s):  
Laser Diode ◽  
Data Transmission ◽  
Free Space ◽  
Blue Laser ◽  
Optical Data ◽  
Free Space Optical ◽  
Blue Laser Diode

Design of 16 × 40 Gbps hybrid PDM-WDM FSO communication system and its performance comparison with the traditional model under diverse weather conditions of Bangladesh

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
A. K. M. Sharoar Jahan Choyon ◽  
Ruhin Chowdhury
Keyword(s):  
Wavelength Division Multiplexing ◽  
Communication System ◽  
Channel Model ◽  
Optical Power ◽  
Weather Conditions ◽  
Optical Signal ◽  
Performance Comparison ◽  
Traditional Model ◽  
Atmospheric Conditions ◽  
Free Space Optical

Abstract A comprehensive design is proposed for free-space optical (FSO) communication system by hybridizing polarization division multiplexing (PDM) with wavelength division multiplexing (WDM) and its performance is investigated under diverse turbulent weather conditions of Bangladesh. Here we consider gamma–gamma (G–G) distribution for the turbulent FSO channel model. Moreover, a PDM-WDM technique not only maximizes the link capacity of FSO system but also enhances the spectral efficiency (SE) of the system. Besides, the performance of this hybrid PDM-WDM FSO system is compared with the traditional model and the proposed hybrid system exhibits excellent performance under diverse atmospheric conditions of Bangladesh. Performance analysis of the proposed model as well as the comparison with the traditional model is described in terms of optical power spectrum (OPS), optical signal to noise ratio (OSNR), bit error rate (BER), Q factor, constellation diagrams, and eye diagrams.

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