Femtosecond transient absorption pump–probe spectroscopy has been used to study the third- and fifth-order nonlinear susceptibility of UV-grade fused silica. Theoretical simulations support the experimental evidence of interference between the third- and fifth-order contributions to the signal. Approximate values of the second-order nonlinear refractive index n4 and of the three-photon absorption coefficient γ are obtained.
© 2001 Optical Society of America
(320.2250) Ultrafast optics : Femtosecond phenomena
(320.7130) Ultrafast optics : Ultrafast processes in condensed matter, including semiconductors
(320.7150) Ultrafast optics : Ultrafast spectroscopy
Katrin Ekvall, Cecilia Lundevall, and Peter van der Meulen, "Studies of the fifth-order nonlinear susceptibility of ultraviolet-grade fused silica," Opt. Lett. 26, 896-898 (2001)