No abstract

We numerically calculate the switching performance of all-optical ultra-fast gate switches employing the cascade of second harmonic generation and difference frequency mixing in periodically poled lithium niobate devices. In the analyses, the device fabrication errors are considered. We show that the domain length error decreases the switching efficiency significantly.

We propose a cascaded quasi-phase matched (QPM) lithium niobate (LN) device. In the device, two QPM-LN crystals with different domain inversion periods are cascaded. We numerically show that the cascaded QPM-LN device has an all-optical decision gate function, thus enabling a compact and stable 3R circuit.

No abstract

No abstract