Creation of second-order nonlinearity and quasi-phase-matched second-harmonic generation in Ge-implanted fused silica planar waveguide

Huai-Yi Chen, Chun-Lin Lin, Yu-Hsien Yang, Shiuh Chao, Huan Niu, Chih T'sung Shih
2005 Applied Physics Letters  
A planar waveguide was formed in fused silica plate by implantation of 5-MeV Ge 2+ ions to a dose of 10 15 ions/ cm 2 . Thermal poling created larger second-order nonlinearity in the waveguide than in blank fused silica plate. The nonlinearity could be erased by 266 nm ultraviolet exposure. Periodical nonlinearity distribution in the waveguide was implemented by periodical UV exposure. The first-order quasi-phase-matched second-harmonic generation from 1064 nm fundamental mode to 532 nm
more » ... tal mode was achieved in the waveguide. The d 33 : d 31 ratio was found to be 3.2: 1, in favor of the built-in electric field model for Ge-implanted silica waveguide.
doi:10.1063/1.1871343 fatcat:hneqmmtxgjbnlga4chsrn7577y