Nonlinear optical coupling to planar GaAs/AlGaAs waveguides

Abstract
Nonlinear optical coupling to planar GaAs/AlGaAs waveguides has been observed at 1.06 μm using a grating coupling technique. At an input intensity of 100 MW/cm2, intensity dependent nonlinear switching to the waveguide mode occurs. The results indicate a fast nonlinear response time.