We prepared nonresonant-type homogeneous glasses containing Bi2O3 by the melting method. The third-order optical nonlinear susceptibility χ(3) was found by third-order harmonic generation measurement to be 9.3 × 10−12 esu. We attribute the nonlinearity of these glasses to the large molar refraction of glasses containing Bi2O3. These glasses also exhibited an ultrafast response time below 200 fs by a degenerate four-wave mixing method using a femtosecond laser, indicating that the nonlinearity of these glasses originated mainly from pure electronic polarization.
© 1996 Optical Society of America
Original Manuscript: May 13, 1996
Published: October 15, 1996
Naoki Sugimoto, Kazuyuki Hirao, Hirohisa Kanbara, Seiji Fujiwara, and Koichiro Tanaka, "Ultrafast response of third-order optical nonlinearity in glasses containing Bi2O3," Opt. Lett. 21, 1637-1639 (1996)