Amplified ultrafast all-optical switching using fully-phasematched eascaded second-order nonlinearities and a polarization-gate geometry

摘要

We demonstrate amplified all-optical switching of ultrashort laser pulses using two different types of cascaded second-order nonlinear optical processes simultaneously in a polarization-gate geometry. The first process rotates the input-pulse polarization, thus achieving optical gating. At high intensities, this signal pulse is then amplified by a differnet process involvign parametric amplification, yielding switching efficiencies up to 320