We report on the fabrication of the 10-mm-long lithium niobate ridge waveguide and its supercontinuum generation at near-visible wavelengths (around 800nm).The waveguides are fabricated by a combination of MeV copper ion implantation followed by wet etching in a proton exchanged lithium niobate planar waveguide.Using a mode-locked Ti:sapphire laser with a central wavelength of 800nm,the generated broadest supercontinuum through the ridge waveguides spans 302 nm (at-30 dB points),from 693 to 995nm.Temporal coherence properties of the supercontinuum are experimentally studied by a Michelson interferometer and the coherence length of the broadest supercontinuum is measured to be 5.2 μm.Our results offer potential for a compact and integrated supercontinuum source for applications including bio-imaging,spectroscopy and optical communication.