Patent ID: 7483609

Claim:
An image wavelength conversion device, wherein one end and the other end of each of a multitude of quasi-phase-matching sum frequency generating optical waveguides are aligned in a two-dimensional plane to form an optical waveguide array, wherein one plane of the optical waveguide array forms an incident plane which includes respective waveguides as elements thereof, and the other plane of the optical waveguide array forms an exit plane which includes waveguides corresponding to the waveguides of the incident plane as elements thereof, and wherein, from an incident light (λ 1 ) and an excitation light (λ 2 ) incident to an arbitrary element of the incident plane, an output light (λ 3 ) is generated in the corresponding waveguide element, the output light (λ 3 ) having the relationship of (λ 1 ) −1 +(λ 2 ) −1 =(λ 3 ) −1 in which λ 1 ,λ 2 , and λ 3 represent the wavelength of the incident light, the wavelength of the excitation light, and the wavelength of the output light, respectively, wherein the incident light is an invisible light ranging from the infrared light to the millimeter wave and the excitation light has a wavelength for making the output light a visible light, and wherein the incident light is most preferably an infrared light of 3.5 μm and the excitation light and the output light are 0.8 μm and 0.65 μm, respectively.