Patent attributes
A wavelength conversion device has a supporting substrate, and a wavelength conversion element provided on the supporting substrate, with separate portions provided on both sides of the wavelength conversion element. The separate portions are separated from the wavelength conversion element by an adhesive layer that bonds the supporting substrate and the wavelength conversion element while also bonding the supporting substrate with the separate portions. The element and separate portions are made of ferroelectric materials, respectively. The wavelength conversion element has a ridge optical waveguide, with grooves provided on each or both sides of the ridge optical waveguide and extended portions provided on the outside of each of the grooves.
