Power-dependent coupling and fast switching in distributed coupling to ZnO waveguides
R. M. Fortenberry, R. Moshrefzadeh, G. Assanto, Xu Mai, E. M. Wright, C. T. Seaton, G. I. Stegeman
Appl. Phys. Lett. 49, 687-689 (1986)
Abstract:A 20-fold decrease in the efficiency of prism coupling into low-loss ZnO waveguides was found with increasing incident power at 0.532 Ám. All-optical switching in the temporal envelope of 10 ns laser pulses was interpreted theoretically in terms of an absorptive nonlinearity with a relaxation time much slower than the pulse width.