Abstract: Disclosed is an optical device for the processing of an optical wave by non-linear effects, comprising, on the surface, a guide and doping zones arranged transversally to the direction of the guide. The distribution pitch of these zones is equal to an even multiple of the length of coherence for the interaction envisaged. The length of each zone along the direction of the guide is equal to an odd multiple of the length of coherence.

Abstract: An optical wavelength converter system includes a light source for emitting a fundamental wave, a fiber or optical waveguide type optical wavelength converter device for converting the wavelength of the fundamental wave and emitting a wavelength-converted wave, and an optical system for introducing said fundamental wave into the optical wavelength converter device. The optical wavelength converter device includes an element made of an organic nonlinear optical material and covered with a cladding layer which has a smaller refractive index than the refractive index of said element. The optical wavelength converter device is housed in a closed container which is filled with an inert medium such as perfluorocarbon oil to keep the element out of contact with an atmosphere such as air.

Abstract: A light wavelength converter comprising a substrate that is made of a material with a non-linear optical effect, and a loop-shaped optical waveguide that is formed on the substrate, whereby a second harmonic wave or a sum wave emanates from a fundamental wave that has been propagated in a specific area of the optical waveguide and part of the fundamental wave that has not been converted to the second harmonic wave or the sum wave is returned to the specific area of the optical waveguide, so that a fundamental wave with a relatively low output can be efficiently converted to a second harmonic wave and a high-output second harmonic wave can be obtained.

Abstract: This invention provides process embodiments for the production of second order nonlinear optical media and waveguiding devices. An important aspect of an invention waveguiding device is the use of a novel electrode design which permits the application of a high voltage electric field for molecular orientation of a dipolar organic waveguiding medium.