Accurate zero-dispersion wavelength measurements in single-mode fibers: two frequency-domain methods

Accurate determination of the zero-dispersion wavelength (λ ₀) is crucial for high bandwidth performance in single-mode fiber systems. We examine two dispersion measurement systems, based on the frequency-domain phase shift and differential phase shift techniques. Both systems are capable of measuring λ₀, with repeatabilities (precisions) of ±0.1 nm; however, their ultimate accuracies have yet to be determined. By comparing the two systems, we get an estimate of potential systematic errors. The systems are used to determine λ₀ in standard reference fibers