Abstract

Modern communication systems ask for fast signal processing devices, and IO delay line architectures promise to fulfill these needs. These architectures are implemented on LiNbO₃ plate and are comprised of electrooptic (EO) tapping gratings to tap light from the optical delay line, and holographic gratings to direct tapped light to the output integrating lens. The distance between each tapping grating corresponds to the period of the input pulse amplitude modulated (PAM) signal. For the delay line to realize N positive coefficients c_i with the constraint the EO tapping gratings must have efficiency η_i: where 0 ≤ η_i ≤ 1. The above relation is derived with the condition that η_n−1 = 1. Therefore any non-negative coefficient set can be represented within a normalization constant.

© 1989 Optical Society of America