Patent ID: 6972894

Claim:
An optical wavelength conversion device comprising: a micro-structured optical waveguide including sections that have a non-linear material with an index of refraction which changes as a non-linear function of light intensity, said waveguide including a light guiding core region, and said waveguide being dimensioned for providing spatial overlap between the sections filled with the non-linear material and light propagating within the waveguide; a first optical light source for introducing light into said waveguide in a mode guided along the core; a second intensity modulated light source for introducing encoding light into said waveguide in such a manner that it illuminates the sections filled with a non-linear material, said second light source having an intensity modulation sufficient to change the refractive index of the non-linear material by an amount sufficient to encode or modulate the light from the first optical light source accordingly, said encoding taking place through the effect of leaking light from the first light source from the inside of the guiding core to the outside of the guiding core.