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[IEEE 2019 International Conference on Nascent Technologies in Engineering (ICNTE) - Navi Mumbai, India (2019.1.4-2019.1.5)] 2019 International Conference on Nascent Technologies in Engineering (ICNTE) - Development of Optical Communication Framework with Xilinx Gigabit Transceivers
摘要： In recent years, many FPGA vendors have come up with high speed transceiver blocks which handle all the physical layer signaling and Media Access layer operations required to achieve robust high speed communication. Also, optical communication is suitable for high bandwidth applications and gaining popularity over any other wired media which are currently used with FPGA implementations. This proposed research work is to focus on achieving optical fiber link with Xilinx Gigabit transceiver block for data rates of over 3.125 Gbps transmitted serially. The optical digital link will be established between two FPGA boards which are Spartan 6 Series SP605 boards which can be coupled to optical transceiver modules known as SFP. The basic GTP MAC wrapper core from Xilinx is being used as base for data transmission and reception. GTP performance is validated with the help of Xilinx bit error test known as IBERT. The results of the IBERT test are observed and calculated using Chip-Scope-Pro analyzer to obtain the faults in connections, defects in medium, bit error ratio and bit error detection during transmission and reception. Various ports in each GTP tile required for clock, reset, encoding, decoding, serialization, deserialization, error correction, polarity control, pattern checking, etc are used to run a code which will enable the actual transmission and reception of information bits with high data rate with very low bit error rate.
关键词： IBERT,Xilinx GTP,Optical link,FPGA,SFP
更新于2025-09-16 10:30:52
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Free Space Optical Communication (System Design, Modeling, Characterization and Dealing with Turbulence) || 4. Mitigation of beam wandering due to atmospheric turbulence and prediction of control quality using intelligent decision making tools
摘要： In a Free Space Optical Link (FSOL), atmospheric turbulence causes fluctuations in both intensity and phase of the received beam and impairs link performance. Beam motion is one of the main causes for major power loss. This chapter presents an investigation of the performance of two types of controller designed for aiming a laser beam at a particular spot under dynamic disturbances. Multiple experiment observability nonlinear input-output data mapping is used as the principal component for the controllers’ design. The first design is based on the Taguchi method while the second is the Artificial Neural Network (ANN) method. These controllers process the beam location information from a static linear map of a 2D plane: Optoelectronic Position Detector (OPD) as observer, and then generate the necessary outputs to steer the beam with a micro-electromechanical mirror: Fast Steering Mirror (FSM). The beam centroid is computed using a Mono-Pulse Algorithm (MPA). Evidence of suitability and effectiveness of the proposed controllers are comprehensively assessed and quantitatively measured in terms of coefficients of correlation, correction speed, control exactness, centroid displacement and stability of the receiver signal through the experimental results from the FSO link setup established for the horizontal range of 0.5 km at an altitude of 15.25 m. The test field type is open flat terrain, grass and a few isolated obstacles.
关键词： atmospheric turbulence,Artificial Neural Network (ANN),Mono-Pulse Algorithm (MPA),Fast Steering Mirror (FSM),beam wandering,Taguchi method,Free Space Optical Link (FSOL),Optoelectronic Position Detector (OPD)
更新于2025-09-12 10:27:22
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286 nm monolithic multicomponent system
摘要： We present a 286 nm monolithic multicomponent system in which two identical multiple quantum well (MQW) diodes merge with a waveguide together on a single chip. The monolithic multicomponent system allows all existing standard fabrication processes and establishes an optical link between two MQW-diodes because of the simultaneous emission-detection phenomenon. One MQW-diode transcribes electronic information into an optical signal to be coupled into a waveguide. The guided light then propagates along the waveguide to the other MQW-diode that converts the optical signal into an electronic one. A spatial light transmission at 50 Mbps is demonstrated using non-return-to-zero on–off keying modulation.
关键词： monolithic multicomponent system,multiple quantum well diodes,286 nm,spatial light transmission,waveguide,simultaneous emission-detection phenomenon,optical link
更新于2025-09-04 15:30:14