Volume 29, Issue 1 January 2015

Improving the Performance of DWDM Free Space Optics System under Worst Weather Conditions [Full Text]

Ibraheem Abdulah and Hayder Ali

Abstract—Multiple transmitters/receivers (TX/RX) with travelling wave Semiconductor Optical Amplifier (SOA) is one of technologies that used to eliminate the effect of weather conditions such as dense fog and heavy dry snow on free space optical communication link. This technology is used to improve the quality of Free Space Optics (FSO) communication system and increase the maximum transmission range.In this paper we used simulation tool Optisystem toimplemente the architecture of multiple TX/RX system with travelling wave Semiconductor Optical Amplifier (SOA) under dense fog atmospheric condition. By evaluating the maximum Q factor and the maximum transmission range of FSO link we can compare between used multiple transmitters/receivers (TX/RX) with travelling wave Semiconductor Optical Amplifier (SOA) and without travelling wave Semiconductor Optical Amplifier (SOA). 

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Learning an Online Control Experiment Platform Using Labview Software [Full Text]

K.S Alli, A.M. Jubril, and B.O Akinwale.

Abstract—This paper illustrates the design of DC control experiments using i-lab interactive architecture. The developed control experiments involved the implementation of virtual instruments to produce digital controllers with Graphical User Interface using LabVIEW software, to ease students in performing position control, speed control and system modeling of the DC servomotor experiments platform. This experiments platform is deployed online using Massachusetts Institute of Technology (M.I.T) interactive laboratory architecture. PID controller was used to control the output response and stabilize the control system. Interactive software is developed to help the students to visualize and analyze the system.