It is shown that nonlinear phenomena in quadratic media can be exploited in ultrafast, high-contrast all-optical switching. Two examples of transistor-like action, namely an all-optical switch based on the parametric down-conversion and a device exploiting vectorial cascading are considered in details. Influence of various control parameter including the effect of pulse walk-off on the performance of the envisaged schemes is discussed.
Falk L. Lederer,
Andrey E. Kobyakov,
Vladimir P. Torchigin,
"Prospects of χ(2) photonics", Proc. SPIE 2954, Fiber Integrated Optics, (20 December 1996); doi: 10.1117/12.262440; https://doi.org/10.1117/12.262440