High-power effects in nonlinear optical waveguides

Abstract
ZnO optical waveguides have been found to withstand power fluxes up to 1011 W/cm2 in pico‐second pulses before damage occurred. Under the high power, a TE0 mode at 1.06 μm generated a TM1 mode at 0.53 μm. A ray theory of second‐harmonic generation in waveguides has been developed and the experimental results are compared with it.