Device for doubling the frequency of a light wave

Optical waveguides – Having nonlinear property

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359332, H03F 700

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active

052186610

ABSTRACT:
A device for doubling the frequency of a light wave and having a satisfactory waveguide action is obtained in a simple manner by providing, in a nonlinear optical material 11, periodic domains 12 having a reduced second-order susceptibility and an increased refractive index relative to the nonlinear optical material by means of proton exchange or proton implantation. By means of a heat treatment, the refractive index of the material in the periodic domains is reduced to a value which is less than 0.10 higher than that of the nonlinear optical material, thus obtaining a low degree of light scattering.

REFERENCES:
patent: 5011250 (1991-04-01), Okada et al.
patent: 5036220 (1991-07-01), Byer et al.
patent: 5052770 (1991-10-01), Papuchon
patent: 5121250 (1992-06-01), Shinozaki et al.
Vohra et al., Journal of Applied Physics, vol. 66, No. 11, Dec. 1, 1989 pp. 5161-5174 "Diffusion Characteristics and Waveguide Properties of Proton-Exchanged and Annealed LiNbO3 Channel Waveguides".

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