Waveguide type second-harmonic generation element and method of

Coherent light generators – Particular beam control device – Nonlinear device

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372 21, 359328, 385122, H01S 310

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052491919

ABSTRACT:
A waveguide type second-harmonic generation element includes a substrate made of LiTaO.sub.3, approximately parallel domain inversion regions formed on the substrate and extending in a first direction, where the domain inversion regions have a first depth into the substrate, approximately parallel domain non-inversion regions formed on the substrate and extending in the first direction, where the domain inversion region and the domain non-inversion regions alternately occur on the substrate, and an optical waveguide formed on the substrate and traversing the domain inversion regions and the domain non-inversion regions, where the optical waveguide has a second depth and extends in a second direction which is approximately perpendicular to the first direction.

REFERENCES:
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patent: 5052770 (1991-10-01), Papuchon
K. Fujita, "Blue/Green Laser using SHG element, Rapid Development Aiming at Applications to Optical Disks", Nekkei Electronics, Aug. 6, 1990 (No. 506), pp. 143-148.
IEEE Photonics Technology Letters, Oct. 1989, No. 10, Webjorn et al. "Blue Light Generated by . . . in a Lithium Niobate Channel Waveguide".
Applied Physics Letters, vol. 56, No. 15 Apr. 1990, Nakamura et al. "Ferroelectric inversion layers . . . treatment of proton-exchanged LiTaO.sub.3.".
Applied Physics Letters, vol. 58, No. 24 Aug. 1991, Mizuuchi et al., "Second-harmonic generation of blue light in a LiTaO.sub.3 waveguide".
Optics Letters, vol. 58, No. 24, Aug. 1991, Yamamoto et al., "Milliwat-order blue-light generation in a periodically domain-inverted LiTaO.sub.3. waveguide".
IEEE Photonics Technology Letters, vol. 3, No. 7, Jul. 1991, Ahlfeldt et al., "Periodic Domain Inversion . . . in Lithium Tantalate Waveguides".
Patent Abstracts of Japan, vol. 16, No. 117, Mar. 1992, Akimoto et al., "Waveguide Type Wavelength Converting Element".

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