Electro-optic crystal, diffraction-based, beam-steering element

Optical: systems and elements – Optical modulator – Having particular chemical composition or structure

Reexamination Certificate

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C359S315000, C359S254000, C359S245000

Reexamination Certificate

active

07411724

ABSTRACT:
A beam-steering element made of a more optically-active material, potassium tantalate niobate, with an improved diffraction efficiency, having a plurality of electrode layers and one electro-optic crystal layer interposed between every two adjacent electrode layers. Each electro-optic crystal layer and the electrode layer adjacent thereto have an aspect ratio of about 1:1. The electrode layers and the electro-optic crystal layers are interposed between two substrates. Preferably, the substrates are transparent to an incoming beam to be modulated by the electro-optic crystal layer.

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Thomas et al. Optimal Cascade Operation of Optical Phased-Array Beam Deflectors, Applied Optics, 1998, pp. 6196-6212, vol. 37, No. 26.
Van Raalte, Linear Electro-Optic Effect in Ferroelectric KTN, Journal of The Optical Society of America, May 1967, pp. 671-674, vol. 57, No. 5.

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