Abstract

Optical signal processing can be implemented by the nonlinear mixing of optical waveforms in planar integrated optics waveguides. For example, we have previously¹ demonstrated the convolution of optical waveforms of picosecond duration via second-order nonlinearities in LiNbO₃ waveguides. Here we report (1) the application of this effect to a transient digitizer with picosecond resolution, and (2) the application of third-order nonlinearities in distributed feedback gratings to signal processing. The three interaction geometries are illustrated in Figs. 1-3.

© 1982 Optical Society of America