(1) Department of Optoelectronic Engineering, Huazhong University of Science and Technology, Wuhan, 430074, P. R. China
Abstract:
Wavelength conversion between picosecond pulses with the cascaded second-order nonlinearity in LiNbO3 waveguides is simulated numerically using finite difference beam propagation method. The influences of group-velocity mismatching and input pulse parameters on conversion efficiency and generated pulse characteristics are analyzed. The results indicate that increasing the input pump pulse width will enhance conversion efficiency but diminish compression ratio of the generated pulse. The generated pulse is inevitably compressed under pulsed pumping, and introducing the initial time delay can reshape the generated pulse.
