The Influence of Zero-dispersion Point of Photonic Crystal Fiber on Supercontinuum Generation

The supercontinuum spectrums generated in photonic crystal fibers of normal and anomalous dispersions are calculated by nonlinear Schrodinger equation.The solution shows that the spectrum width of the supercontinuum generated in normal dispersion photonic crystal fiber is much larger than that in anomalous dispersion photonic crystal fiber.In experiment,the Supercontinuum spectrums are generated in different zero-dispersion photonic crystal fibers with 130 fs ultrafast laser pulses.The photonic crystal fibers of zero-dispersion point at 800 nm,1 060 nm and 2 um are engaged.The Supercontinuum spectrums with different pulse energies and different central wavelengths are obtained and the difference between them are discussed.