Effective quadratic nonlinearities as high as 0.2 pm/V are reported for the first time to our knowledge in poled germanosilicate fibers. This value is ~200 times higher than previously achieved in these fibers. The presence of Ge is found to enhance the efficacy of both thermal (in combination with OH doping) and electron-beam poling in silica.
© 1994 Optical Society of America
Original Manuscript: December 20, 1993
Published: May 15, 1994
P. G. Kazansky, L. Dong, and P. St. J. Russell, "High second-order nonlinearities in poled silicate fibers," Opt. Lett. 19, 701-703 (1994)