Optical device having domain structure and method for manufactur

Details Optical device having domain structure and method for manufactur Optical device having domain structure and method for manufactur

1991-07-10

1993-09-28

Ullah, Akm E.

Optical waveguides

Having nonlinear property

359328, G02B 600

Patent

active

052492508

ABSTRACT:
An optical device having a periodic inverted domain construction is used for second harmonic generating devices or the like. The optical device comprises a ferroelectric crystal substrate which is provided in this surface with a periodic inverted domain structure consisting of a plurality of parallel inverted domain regions arranged at intervals. The thickness t and width w of the inverted domain regions and the thickness T of the ferroelectric crystal substrate meet the criteria expressed by: t/w.gtoreq.1 and 0.1<t/T.ltoreq.1.

REFERENCES:
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Feng et al, "Enhancement of Second-Harmonic Generation in LiNbO.sub.3 Crystals . . . ", Appl. Phys. Lett. 37(7), Oct. 1980, pp. 607-609.
Publication Journal of Applied Physics 50(7) Jul. 1979 pp. 4599-4603 "Ferroelectric Domain Inversion in Ti-diffused LiNbO.sub.3 Optical Waveguide" by Shintaro Miyazawa.
Electronics Letters 1st Feb. 1990, vol. 26 No. 3 pp. 188-189 "Fabrication Of Domain Reversed Gratings For SHG in LinbO.sub.3 by Electron Beam Bombardment", Keys et al.
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Article Physical Review, vol. 127, No. 6 Sep. 15, 1962 entitled "Interactions between Light Waves in a Nonlinear Dielectric" by Armstrong et al. pp. 1918-1939.
Article Applied Physics Letters vol. 37 (1980) Oct. No. 7, New York, pp. 607-609, Feng et al.

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