Performance Analysis of a Full - Duplex WDM-EPON based System with Fiber to Wireless Optical Network
Wireless technique is speedily becoming more essential during last four decade. Optical wireless channel is a type of communication in which unguided visible, IR, UV light wave is used to carry message signal. Based on transmission range optical wireless channel is used to send message at ultra-short, short, medium, high and ultra-high range. In this paper message signal is send through IR light wave at long range OWC from optical line terminal (OLT), having frequency lying in the range of 750nm-1600nm.On the other hand single mode optical fiber is used at receiver end to carry signal to the optical network unit (ONU).In this paper it is demonstrated that WDM-EPON technology has been successfully deployed in fiber to home which makes system more advanced, cost effective and having very high bandwidth and very high data rate. The proposed bidirectional simulation is made on Optisystem software and analyzed considering Qfactor, BER and power received.
Performance Evaluation of Intersatellite Free Space Optical Communication System with Varied Parameters and Transceiver Diversity
Free space optical communication provides a very important method for the satellites orbiting around the earth to communication with each other. In this paper , optical intersatellite link is modelled using optisystem software and then the effect of varying the transmitter power and aperture diameter of transmitter and receiver telescopes is analysed. The results shows that large transmitter power and aperture diameters are needed for communication at high data rates (Gbps) over large distances(5000km) which is in case of leo-leo communication.so, the multiple TX/RX are used to improve the quality of intersatellite optical wireless communication (IsOWC) link. The IsOWC with multiple TX/RX system performance is analysed in terms of received power, eye diagram and Q-factor. The model is designed and simulated using the optisystem 7.0 software. The results of IsOWC with and without multiple TX/RX are also taken into account. The proposed system shows that the introduction of 4 TX/RX makes the communication possible for leo-leo communication over 5000km at the data rate of 5.6Gbps.
Photonic Ultra-Wideband 781.25-Mb/s Signal Generation and Transmission Incorporating Digital Signal Processing Detection
The generation of photonic ultra-wideband (UWB) impulse signals using an uncooled distributed-feedback laser is proposed. For the first time, we experimentally demonstrate bit-for-bit digital signal processing (DSP) bit-error-rate measurements for transmission of a 781.25-Mb/s photonic UWB signal over fiber links. The DSP algorithm is described, the generated UWB signal is shown to comply with the U.S. Federal Communications Commission requirements, and transmission of 1.71times105 UWB bits over fiber is demonstrated without error.