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 ci with the constraint the EO tapping gratings must have efficiency ηi: where 0 ≤ ηi ≤ 1. The above relation is derived with the condition that ηn−1 = 1. Therefore any non-negative coefficient set can be represented within a normalization constant.
© 1989 Optical Society of America
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