Abstract
Second-harmonic generation in germanosilicate glasses was encoded by coherent superposition of the 810-nm fundamental and the 405-nm second-harmonic light of a femtosecond laser. The difference spectra between the absorption spectra of the glasses before and after preparation were measured. An evident correlation between the induced second-order nonlinearity and the creation of a Ge electron center was observed, suggesting that a band-to-band transition by multiphoton absorption is probably responsible for the photoinduced second-harmonic generation.
© 1999 Optical Society of America
Full Article | PDF ArticleMore Like This
Jianrong Qiu, Jinahi Si, and K. Hirao
Opt. Lett. 26(12) 914-916 (2001)
Jinhai Si, Shingo Kanehira, Kiyotaka Miura, and Kazuyuki Hirao
Opt. Express 14(10) 4433-4438 (2006)
N. M. Lawandy and R. L. MacDonald
J. Opt. Soc. Am. B 8(6) 1307-1314 (1991)