title: Time-resolved nonlinear refraction in femtosecond laser gain media.
abstract: We present time-resolved measurements of the electronic and the nuclear contributions to the third-order nonlinearities of Ti:sapphire and Cr:LiSGaF. The results suggest that nonlinear refraction in Ti:sapphire is resonantly enhanced relative to that of undoped sapphire. The implications of the nonlinear responses for short-pulse formation are discussed.
authors: S
authors: S
authors: Smolorz
authors: F
authors: F
authors: Wise