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Title Nonlinear impairments in raman amplifiers
Author Wang, Wenfeng (Glass, COM, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Supervisor Rottwitt, Karsten (Fibers & Nonlinear Optics, COM•DTU Department of Communications, Optics & Materials, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Povlsen, Jørn Hedegaard (Fibers & Nonlinear Optics, COM•DTU Department of Communications, Optics & Materials, Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark)
Institution Technical University of Denmark, DTU, DK-2800 Kgs. Lyngby, Denmark
Thesis level Master's thesis
Year 2003
Abstract This thesis investigated the impacts of Raman Amplifier (RA) architectures and pumping schemes to the RA performance, and optimized the design to distributed RAs and discrete dispersion compensation raman amplifiers (DCRA). The Raman Amplifier performance in the system is strongly dependent on the ASE noise, DRB noise and Fiber nonlinearity. The three factors are all related to the Raman architectures and pumping schemes. The optimum Raman amplifier design should compromise between the three factors. A simulation program is designed to optimize RAs. Distributed Raman Amplifiers is simulated in Raman/EDFA hybrid amplified systems; the discrete RA will be in a dispersion compensation module. The ratio of the signal SNR, Rsnr, at the end of the contrasting passive and active systems is the final measurement of system benefit of adopting Raman amplification. The performances of dual-stage and single-stage DCRA designs are compared. Approximated pulse propagation in Raman amplified transmission line is also investigated.
Pages 82
Admin Creation date: 2006-06-22    Update date: 2007-02-24    Source: dtu    ID: 184764    Original MXD