This paper successfully demonstrated simulated analysis and investigation of 100 multichannel DWDM-based FSO system having each channel data rate 10 GB/s separated by 100 GHz frequency spacing under adverse weather conditions such as haze, heavy rain and heavy dust fog. Apart from this, a comparison of two modulation formats RZ and NRZ has been performed to optimize the system performance under different climate conditions at diverse visibility ranges. The performances of the proposed work have been compared in terms of BER, Q-Factor, SNR, eye diagrams and received signal power on 193.1 THz. It has been observed that NRZ modulated system showed robust performance as compared to the RZ modulated system for transmitting 1 TB/s data rate over free space with acceptable values of BER ≥ e−22 & Q-Factor ≤ 9.6 dB.
This paper is successfully demonstrating simulating comparison and investigation of 48 channels of dense wavelength division multiplexing free space optical (DWDM−FSO) network with a 10 GB/s data rate on each channel separated by 100 GHz frequency spacing under a clear sky, haze and light rain climate conditions. Apart from this, comparison of a series of modulation formats such as non−return to zero (NRZ), return to zero (RZ), carrier suppressed return to zero (CSRZ), Soliton pulse, and offset quadrature phase shift keying (OQPSK) have been performed and optimized the performance of the designed system with best suited modulated system. The performance of the proposed work has been evaluated in terms of bit error rate (BER), quality factor (Q), signal−to−noise ratio (SNR), received signal power and eye diagrams. It has been observed that OQPSK modulated system has shown more robust performance as compared to other line encoding techniques. The minimum simulation work reports for OQPSK modulated system have been recorded with the acceptable performance BER ≤ 10−10, Q ≥ 6 dB at the 2000 meters FSO link range.
This paper is demonstrating the simulative comparisons and investigation of free-space optical fiber optic (FSO/FO) hybrid link under the effects of clear sky, haze and light rain weather conditions by using phase shift keying (PSK) modulation format with a data rate 40 GB/s at 1550 nm wavelength. An optical amplifier with 40 dB gain is placed before the FSO transmitter to boost the amplitude of a weak signal. A combination of multiple FSO transmitters, erbium-doped fiber (EDF) 3 m and bidirectional dispersion compensating fiber (DCF) 3.2 km are employed to overcome the effect of attenuation in the propagating channel. The performance of the system is evaluated in terms of BER, SNR, Q factor and eye diagrams. It has been observed that the performance of dual-channel hybrid FSO/FO is very robust as compared to conventional FSO/FO systems. While the communication distance with the hybrid link is escalated up to 54 km, 11 km and 5.5 km in a clear sky, haze and light rain climate conditions correspondingly. The satisfying values of BER have been observed as 10−14, 10−11, and 10−13 for clear, haze and light rain weather conditions, respectively.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.