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Proton-exchanged Fresnel lenses in Ti:LiNbO3 waveguides

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Abstract

Fresnel lenses were fabricated by the patterned proton-exchange technique in titanium-diffused lithium niobate waveguides. The large change in refractive index available with the proton exchange allows fabrication of a high-efficiency thin Fresnel lens. Lens characteristics of nearly diffraction-limited focus spot size and efficiency up to 70% were obtained. The use of the lens to construct an integrated-optic rf spectrum analyzer of 1-GHz bandwidth and 2-MHz resolution is also demonstrated.

© 1986 Optical Society of America

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Fabrication and characterization of titanium-indiffused proton-exchanged optical waveguides in Y-LiNbO3

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Appl. Opt. 25(9) 1495-1498 (1986)

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