Wavelength converting optical device

Details Wavelength converting optical device Wavelength converting optical device

1989-12-15

1994-12-27

Lee, John D.

Optical waveguides

Having nonlinear property

359332, 385 37, G02F 137

Patent

active

053772911

ABSTRACT:
A wavelength converting optical device includes an optical waveguide which has a waveguide portion and a cladding portion, at least one of which is formed of a nonlinear optical material. A fundamental wave, incident on the waveguide portion from an input end face of the waveguide, is converted into an optical second harmonic wave by Cerenkov radiation and is radiated into the cladding portion. The radiated second harmonic wave is output from an output end face of the waveguide. A reflecting film is provided on the emerging end face of the waveguide. The reflecting film includes a high reflectivity with respect to the fundamental wave of a guide mode and a low reflectivity with respect to the optical second harmonic wave. A wave front converting element is arranged to oppose the reflecting film. The converting element has a diffraction grating for converting the second harmonic wave, emerging from the output end face of the waveguide, into a plane wave.

REFERENCES:
patent: 4830447 (1989-05-01), Kamiyama et al.
patent: 4838638 (1989-06-01), Kamiyama et al.
patent: 4874221 (1989-10-01), Ohsawa
patent: 4892375 (1990-01-01), Chikuma et al.
patent: 4909587 (1990-03-01), Okamoto et al.
Article in the IEEE Journal of Quantum Electronics, vol. 24, No. 6, Jun. 1988, pp. 913-919; entitled "Efficient Second Harmonic Generation of a Diode-Laser . . . ".
Article in the Journal of the Optical Society of America, vol. 44, No. 8, pp. 592-597; entitled "The Axicon: A New Type of Optical Element", Aug. 1954.
"Optical Integrated Circuits", Publication Date: Feb. 25, 1985, pp. 99-100 (Japanese).
Patent Abstract of Japan, vol. 9, No. 262(P-398)[1985], Oct. 19, 1985; JP-A-60 112 023 (Matsushita Denki Sangyo K.K.).
Patent Abstract of Japan, vol. 12, No. 370(P-767)[3217], Oct. 5, 1988; JP-A-63 121 829 (Matsushita Electric Ind. Co., Ltd.).

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