Spectra and Phases of Supercontinuum Pulses Generated in Tapered Fiberand Photonic-Crystal-Fiber with Low Dispersion

摘要

Recently, optical pulses propagating through a tapered fiber (TF) immersed in heavy water (D_2O) or photo= crystal fiber (PCF) of a special design were reported to yield a broad and flat supercontinuum (SC) spectrum because the fiber dispersion characteristics are of low dispersion around 1000 nm. This study was undertaken to investigate spectral intensities and phase distributions of SC pulses generated in low-dispersion fibers. Results show that highly nonlinear PCF with group velocity dispersion (GVD) distributions having an extremum value and zero dispersion around 1000 nm is useful at short fiber length for applications in which the phase distribution is a concern.