Abstract
AbstractCalculation techniques have been developed for the accurate evaluation of the relative intensity noise due to forward reflection in optical transmission lines. Discrete reflections at connection points and Rayleigh backscattering in fibers are taken into account in the calculations. Formulas for simplified models and a numerical calculation algorithm for practical models are investigated.Numerical results for a typical subscriber loops with a total fiber length of 7 km reveal for the first time that Rayleigh backscattering has a strong influence due to its interactions with discrete reflections. Variations in the total amount of forward reflection caused by variations in the reflectance of connection points, the connection loss, and the connection spacing also are analyzed by computer simulation.
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