Pg. Kazansky et al., HIGH 2ND-ORDER NONLINEARITIES INDUCED IN LEAD SILICATE GLASS BY ELECTRON-BEAM IRRADIATION, Optics letters, 18(9), 1993, pp. 693-695
A new technique for inducing a large permanent second-order susceptibi
lity in lead silicate glass is reported. The procedure involves implan
ting electrons by irradiating the glass with an electron beam. Second-
order nonlinearities chi(2) as high as 0.7 pm/V are obtained.