We measured the tilting of a femtosecond laser wave packet in a birefringent rutile crystal. The measurements were carried out with a linear interferometric technique that, in contrast to nonlinear correlation techniques, allows measurement at very low power. A 23-fs delay between the left and the right parts of a 30-fs, 800-nm wave packet with 20° divergence was measured for a 1-mm-thick rutile crystal, in agreement with theoretical predictions.
© 1997 Optical Society of America
C. Radzewicz, J. S. Krasinski, M. J. la Grone, M. Trippenbach, and Y. B. Band, "Interferometric measurement of femtosecond wave-packet tilting in rutile crystal," J. Opt. Soc. Am. B 14, 420-424 (1997)