Spatial control of second-order optical susceptibility induced in thermally poled glasses

Summary form only given.Second-order susceptibility /spl chi//sub ind//sup (2)/ has been induced in different thermally poled glasses. It is mainly due to coupling of the third-order glass susceptibility /spl chi//sup (3)/ with a built in electric field E/sub int/ (/spl chi//sub ind//sup (2)//spl sim//spl chi//sup (3)/E/sub int/). We have recently shown that electron-hole pairs produced by one or two-photon absorption screen E/sub int/ and explain the decay of the /spl chi//sub ind//sup (2)/ thermally induced in borophosphate glasses. Here we demonstrate that this general phenomena allows to tailor the spatial profile of second order susceptibility induced in thermally poled fused silica and borophosphate glasses.