Guided wave spatial transients under a limited grating coupler in a silicon-on-sapphire waveguide

H. Gualous (1) , A. Koster (1) , D. Pascal (1) , S. Laval (1)

1 IEF - Institut d'électronique fondamentale

The limited size of a grating coupler on a waveguide is responsible for the nonuniform guided wave intensity. Spatial transients have been recorded and a characteristic length of the order of 30 μm has been determined by fitting a simple model to the experimental results. This value is consistent with spatial transient measurements performed under nonlinear operation conditions which reveal a 100 μm long dead zone in which switching contrast is very low.

Domaines: Sciences de l'ingénieur [physics]; Sciences de l'environnement; Physique [physics]; Matériaux; Milieux fluides et réactifs

H. Gualous, A. Koster, D. Pascal, S. Laval. Guided wave spatial transients under a limited grating coupler in a silicon-on-sapphire waveguide. Optics Communications, 1996, 123 (1-3), pp.83-88. ⟨10.1016/0030-4018(95)00492-0⟩. ⟨hal-02157834⟩