Abstract
Difference frequency generation in a three‐dimensional LiNbO3 optical waveguide is experimentally shown using a cw Rhodamine 6G dye laser and a Nd:YAG laser at 1.318 μm. The generated difference frequency wavelength was tuned from 1.035 to 1.19 μm. The output power of the difference frequency wave was 2.4 μW at 1.035 μm, with a pumping dye laser power and an idler Nd:YAG laser power of 70 and 1.7 mW, respectively.