Wavelength conversion between picosecond pulses in periodically poled LiNbO3 waveguides using pulsed pumping

With pulsed pumping, wavelength conversion between picosecond pulses is demonstrated based on cascaded 2nd-order nonlinear processes in periodically poled LiNbO3 waveguides. Optical pulses with the repetition rate of 40 GHz and temporal width of 7.5 ps are converted from pump to idler wavelength. The experimental results imply that tunable-wavelength conversion and converted-pulse reshaping can be simultaneously achieved through the proposed approach.