Time-Resolved Measurement of Electronic and Vibrational Nonlinear Refraction in Ti:sapphire and Cr:LiSGaF
We observe electronic and vibrational contributions in the femtosecond nonlinear response of Ti:sapphire and Cr:LiSGaF. The results suggest that nonlinear refraction is resonantly enhanced in Ti:sapphire relative to that of undoped sapphire. Cr:LiSGaF shows a substantial vibrational component and finite two-photon absorption. The implications of the nonlinear responses for short-pulse formation are discussed.
KeywordsSapphire Laser Vibrational Signal Nonlinear Refraction Nonlinear Index Nonlinear Phase Shift
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