The ordinary and extraordinary nonlinear refractive indices of SrLaGa<sub>3</sub>O<sub>7</sub>and Ca<sub>2</sub>Ga<sub>2</sub>SiO<sub>7</sub> were determined from the measured spectral changes in intense 800-nm, 150-fs pulses, propagated through these uniaxial crystals. A numerical analysis involving both group-velocity dispersion and self-phase modulation gave <i>n</i><sub>2</sub> = (11 ± 1) × 10<sup>−20</sup> m<sup>2</sup>/W in SrLaGa<sub>3</sub>O<sub>7</sub> and n<sub>2</sub> = (6.5 ± 1) × 10<sup>−20</sup> m<sup>2</sup>/W in Ca<sub>2</sub>Ga<sub>2</sub>SiO<sub>7</sub> for ordinary polarization;results for extraordinary beams agreed with these values to within experimental error. These high values suggest that these crystals are viable host matrices for pulsed solid-state lasers, capable of producing subpicosecond pulses through Kerr-lens mode locking.
© 1997 Optical Society of America
Z. Burshtein, Y. Kostoulas, and H. M. van Driel, "Determination of the nonlinear refractive indices of Ca2Ga2SiO7 and SrLaGa3O7 with intense femtosecond optical pulses," J. Opt. Soc. Am. B 14, 2477-2480 (1997)