Measurements. Pulse Dispersion Measurements on Concatenated Cabled Optical Fibers at 1.3 μm

Abstract

SummaryTime domain measurements of the bandwidth of concatenated cabled optical fibers at 1.3 μm has been carried out on two different cable constructions. Both time domain and frequency domain analysis are presented.For one cable type containing fibers exhibiting smooth frequency characteristics a concatenation exponent γ = 0.66 was found for a 9.5 km length of concatenated fibers. For the other cable type containing some fibers with irregular frequency characteristics such a fit was not possible for a 24 km length of concatenated fibers but an exponent γ = 0.65 could be fit to the last 14 km. Two splicing procedures were employed on the latter cable type, but no appreciable difference in the results was observed. When the frequency characteristic was regular the 3 dB optical bandwidth of the spliced fiber sections was found to be inversely proportional to therms pulse width broadening.The bandwidth-pulsewidth product agreed with results obtained for Gaussian pulse shapes for one cable type and hyperbolic secant pulse shapes for the other cable type.