Gs. Pu et al., REDUCTION OF CRITICAL POWER IN ALL-OPTICAL SWITCHING WITH SERIES-TAPERED NONLINEAR DIRECTIONAL COUPLER, IEICE transactions on electronics, E78C(9), 1995, pp. 1315-1318
A novel series-tapered nonlinear directional coupler is proposed to im
prove all-optical switching characteristics. Its switching characteris
tics are analyzed by using a beam propagation method based on the Gale
rkin's finite element technique. It is presented that the critical pow
er of the series-tapered nonlinear directional coupler is smaller than
conventional uniform symmetric and tapered nonlinear directional coup
lers.