Pulsed optical parametric amplification based on photonic crystal fibres

In this paper, we simulate pulsed one-pump fibre optical parametric amplifiers (1-P FOPAs) based on photonic crystal fibres in telecommunication region. At first, a PCF is designed such that its zero-dispersion wavelength is located at 1535nm in order to fulfil the phase-matching condition for the parametric amplification in the telecommunication region. Then, the dispersion coefficients of the PCF including (2), (3), (4) and (5) as well as the nonlinear parameters are calculated at the pump, signal and idler wavelengths. Finally, the coupled nonlinear Schrodinger equations are numerically solved and the impacts of pump power and the pulse shape on the evolution of each pulse along the 1-P FOPA are investigated. The results show that the peak powers of the pump, signal and idler are periodically varied and each pulse is distorted and broadened as it propagates down the fibre optical parametric amplifiers. Also, the pulse distortion and broadening increase with the increase in both propagation distance and the input peak power.