Silica fiber poling technology is used to induce a second-order nonlinearit
y or linens electro-optic coefficient into silica fiber, an amorphous centr
osymmetric material without intrinsic second-order nonlinearity. This paper
reports on three poling techniques used for silica fiber thermal poling, C
O2 laser-assisted poling, and ultraviolet (UV) poling. The characteristics,
mechanisms, and latest research results for each poling technique are addr
essed.