Pulse delay measurements in the zero-material-dispersion region for germanium- and phosphorus-doped silica fibres

Abstract

Wavelength-dependent pulse dispersion in germanium- and phosphorus-doped silica fibres of different concentrations was measured using mode-locked subnanosecond pulses in the 1.064–1.55 μm wavelength range. Zero dispersion for GeO2-SiO2 fibres was observed in the 1.3–1.33 μm region depending on the concentration. P2O5-doped silica fibres showed zero dispersion near 1.28 μm, independent of doping concentration. Wavelength-dependent pulse dispersion in germanium- and phosphorus-doped silica fibres of different concentrations was measured using mode-locked subnanosecond pulses in the 1.064–1.55 μm wavelength range. Zero dispersion for GeO₂-SiO₂ fibres was observed in the 1.3–1.33 μm region depending on the concentration. P₂O₅-doped silica fibres showed zero dispersion near 1.28 μm, independent of doping concentration.